SPN 4364/FMI 17 - GHG17 SPN /FMI 16 - GHG17 SPN /FMI 14 - GHG17 SPN 3216/FMI 16 - GHG17 SPN 3216/FMI 18 - GHG17 SPN 3217/FMI 2 - GHG17

Transcription

1 SUBJECT SPN 4364 (ACM) (GHG17) SPN (ACM) (GHG17) SPN (ACM) (GHG17) SPN 3216 (ACM) (GHG17) SPN 3217 (ACM) (GHG17) SPN 3226 (ACM) (GHG17) SPN 3227 (ACM) (GHG17) Diagnostic Tests DATE November 2016 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change SPN 4364/FMI 17 - GHG17 SPN /FMI 16 - GHG17 SPN /FMI 14 - GHG17 SPN 3216/FMI 16 - GHG17 SPN 3216/FMI 18 - DDC-SVC-MAN-0191 GHG17 DD Platform GHG17 SPN 3217/FMI 2 - GHG17 Numerous changes. SPN 3217/FMI 7 - GHG17 SPN 3226/FMI 20 - GHG17 SPN 3227/FMI 2 - GHG17 GHG17 Perform Performance Check - Low Temperature ATD All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

2 DiagnosticLink users: Please update the troubleshooting guides in DiagnosticLink with this newest version. To update the tool troubleshooting guide, open DiagnosticLink and from the Help Troubleshooting Guides menu, select the appropriate troubleshooting manual, then click Update. 4 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

3 SPN 4364/FMI 17 - GHG17 SCR NOx Conversion Efficiency Table 1. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 4364/FMI 17 This Code Sets When the Aftertreatment Control Module (ACM) Detects Poor Selective Catalyst Reduction (SCR) NOx Conversion Efficiency SCR Inlet NOx Sensor and SCR Outlet NOx Sensor Diesel Exhaust Fluid (DEF) Dosing Enabled, 1000 to 2100 rpm, 15 to 100% Load Continuous When Enabling Conditions Met 30 Minutes MIL Parked SCR Efficiency Test Possible causes: Contaminated DEF Incorrect concentration of urea in the DEF Biased NOx sensor Excessive DEF build-up in the exhaust Improper DPF maintenance Over temp aftertreatment NOTICE: DEF crystallization inside the SCR mixing chamber or around the dosing unit does not indicate a failed/ leaking DEF doser. Do not replace the DEF dosing unit unless directed. NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed to within the troubleshooting. Check as follows: 1. Connect DiagnosticLink. 2. Turn the ignition ON (key ON, engine OFF). 3. Check for other fault codes. Are there any air management system fault codes present, such as Intake Throttle Valve (ITV), Intake Manifold Pressure (IMP), Intake Air Temperature (IAT), or turbocharger? a. Yes; diagnose the air management system fault codes first. b. No; Go to step Are there any Exhaust Gas Recirculation (EGR) system fault codes present? a. Yes; repair the EGR system fault codes first. b. No; Go to step Are there any fuel system fault codes present? a. Yes; diagnose the fuel system fault codes first. b. No; Go to step Are there any other NOx sensor fault codes present? a. Yes; diagnose the other NOx sensor fault codes first. b. No; Go to step 7. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

4 2 SPN 4364/FMI 17 - GHG17 WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. 7. Was another emission component-related fault code repaired prior to this step? a. Yes; warm up the engine and perform a Parked SCR Efficiency Test to verify repairs and clear fault codes. Refer to section "GHG17 Perform Parked SCR Efficiency Test". b. No; Go to step Are there any ACM temperature or pressure fault codes present? a. Yes; diagnose the fault first. b. No; Go to step Turn the ignition OFF. 10. Use DEF test strip A to check for diesel fuel or oil contamination of the DEF fluid. Refer to section "Checking Diesel Exhaust Fluid Quality". Do the test strips or visual inspection indicate that the DEF is contaminated? a. Yes; for diesel fuel or oil contamination, refer to the following table for a list of parts that must be replaced. Refill the new DEF tank with new DEF. Verify repair; perform a Parked SCR Efficiency Test to clear the regulatory fault. Refer to section "GHG17 Perform Parked SCR Efficiency Test". b. No; Go to step 11. Table 2. Parts to be replaced for diesel fuel or oil in the DEF system. Refer to the GHG17 DD Platform Workshop Manual (DDC-SVC-MAN-0190) for proper repair procedures. Part Description DEF Tank DEF Tank Header DEF Supply Line From DEF Tank To DEF Pump DEF Line From DEF Pump To DEF Dosing Unit DEF Return Line From DEF Dosing Unit To Tank DEF Pump DEF Dosing Unit Comment Chassis OEM Part Chassis OEM Part Chassis OEM Part Chassis OEM Part Chassis OEM Part Detroit Diesel Part Detroit Diesel Part 11. Using the refractometer from DEF Test Kit W , measure the DEF urea percentage. Is DEF urea percentage between 31 and 34 percent? a. Yes; Go to step 12. b. No; drain and flush the DEF tank and the DEF system with water. Refill the DEF tank with new DEF. Verify repair; perform a Parked SCR Efficiency Test to clear the regulatory fault. Refer to section "GHG17 Perform Parked SCR Efficiency Test". 12. Turn the ignition ON (key ON, engine OFF). 6 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

5 Inspect the area around the DEF dosing unit gasket for DEF crystallization. Is there any DEF crystallization build-up present? a. Yes; this indicates the gasket has failed, NOT the DEF dosing unit. Replace the gasket after completing the DEF quantity test in the next step. Go to step 14. b. No; Go to step Unbolt the DEF doser from the aftertreatment; do not disconnect the DEF lines or electrical connector. Figure 1. Normal DEF Crystallization in the DEF Doser Port Hole 15. Find the graduated cylinder provided in DEF test kit W , which is used in DEF quantity tests; Refer to section "Diesel Exhaust Fluid Quantity Test - GHG17". 16. Perform a DEF Quantity Test service routine. 17. Monitor the amount of DEF dispensed. Is the amount of DEF dispensed between 108 and 132 ml? a. Yes; reinstall the DEF dosing unit. Use a new gasket and bolts, as they are one-time use. Refer to section "Installation of the Diesel Exhaust Fluid Dosing Unit ". Go to step 18. b. No; replace the DEF dosing unit. Use a new gasket and bolts, as they are one-time use. Refer to section "Installation of the Diesel Exhaust Fluid Dosing Unit ". Verify repair; perform a Parked SCR Efficiency Test to clear the regulatory fault. Refer to section "GHG17 Perform Parked SCR Efficiency Test". 18. Disconnect the DEF dosing unit electrical connector. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

6 2 SPN 4364/FMI 17 - GHG17 To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. NOTE: SPN 3361/FMI 5 will set when the DEF dosing unit electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing unit electrical connector is reconnected. 19. Start the engine and perform a complete parked regeneration. Refer to section "Performing a Parked Regeneration - GHG17". The regen will burn off any DEF deposits in the aftertreatment before checking the NOx sensors. NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed by the troubleshooting. 20. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensor readings within 50 parts per million (ppm) of each other? a. Yes; Go to step 22. b. No; replace the inlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Go to step Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17". Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; Go to step 22. b. No; replace the outlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Outlet NOx Sensor". Go to step Reconnect the DEF dosing unit electrical connector. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. 23. Start the engine and perform a parked regeneration. Monitor the NOx conversion efficiency. Is the NOx conversion efficiency above 85%? a. Yes; this fault was likely caused by the DEF build-up in the exhaust which was cleared by the parked regeneration procedures. Perform a Parked SCR Efficiency Test to clear the regulatory fault. Refer to section "GHG17 Perform Parked SCR Efficiency Test". NOTE: Excessive DEF build-up in the exhaust can be caused by a vehicle with a high speed, high average drive load. b. No; Go to step All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

7 Review the last seven minutes of the parked regeneration log data from step 23. The illustration below identifies the last seven minutes of the parked regen. 25. Is the Selective Catalyst Reduction (SCR) inlet temperature lower than SCR outlet temperature by more than 38 C (68.4 F)? Example: SCR outlet temperature is 588 C (1090 F) - SCR Inlet Temp 398 C (748 F) = 171 C (340 F). Difference between inlet and outlet is 171 C (341 F), which is greater than 38 C (68.4 F)? All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

8 2 SPN 4364/FMI 17 - GHG17 a. Yes; Go to step 27. b. No; for a 1-Box system, replace the DOC/SCR module. For a Two-Box system, replace the SCR module. Complete the ATD checklist to identify cause of failure. Go to step Perform a Parked SCR Efficiency Test to clear the regulatory fault. Refer to section "GHG17 Perform Parked SCR Efficiency Test". 27. Review the data from the "Perform the GHG17 Perform Performance Check - Low Temperature ATD" check in step 20. Are the calculated SCR inlet temperature and SCR outlet temperatures sensor readings within 25 C (45 F) at the end of the low temp regen? a. Yes; this indicates internal structural damage for a One-Box. Replace the DOC/SCR module. The ATD checklist is NOT required since the ATD is the primary failed part. This image below illustrates the possible internal damage to the aftertreatment. Go to step 28. b. No; replace the drifted temperature sensor and verify repair. Go to step Perform a Parked SCR Efficiency Test to clear the fault. Refer to section "GHG17 Perform Parked SCR Efficiency Test". 10 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

9 SPN /FMI 16 - GHG17 Selective Catalyst Reduction Closed Loop Control at Maximum Limit (Multiples Sources) Table 3. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN /FMI 16 The Fault Indicates High Diesel Exhaust Fluid (DEF) Delivery NOx Conversion Efficiency Closed Loop DEF Dosing Always Enabled Two Seconds Parked SCR Efficiency Test Check as follows: 1. Connect DiagnosticLink. 2. Using a refractometer from the DEF Test Kit W , measure the DEF percentage. Is DEF percentage between 31 and 34%? a. Yes; Go to step 3. b. No; clean/flush the DEF tank. Go to step 4. Refer to section "Flushing of the Diesel Exhaust Fluid System". 3. Unbolt DEF dosing unit from aftertreatment. Do not disconnect DEF hoses or electrical connector. Refer to section "Removal of the Diesel Exhaust Fluid Dosing Unit". 4. Perform DEF Quantity Test service routine and record the amount of DEF dispensed. Is the dispensed DEF fluid level between 108 and 132 ml? a. Yes; Go to step 5. b. No; replace the DEF dosing unit. To verify repairs, Go to step 8. Refer to section "Installation of the Diesel Exhaust Fluid Dosing Unit ". 5. Reinstall the DEF dosing unit to the aftertreatment, using a new gasket and bolts. 6. Disconnect the DEF dosing unit electrical connector. NOTE: SPN 3361/FMI 5 will set when the DEF dosing unit electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing unit electrical connector is reconnected. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. 7. Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17". NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed by the troubleshooting. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

10 3 SPN /FMI 16 - GHG17 8. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; Go to step 9. b. No; replace the Inlet NOx sensor. For 1-Box, Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". For Two-Box, Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". 9. Reconnect the DEF dosing unit electrical connector. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. 10. Start the engine and perform a Parked SCR Efficiency test to clear the fault code. Refer to section "GHG17 Perform Parked SCR Efficiency Test". 12 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

11 SPN /FMI 14 - GHG17 Selective Catalyst Reduction Closed Loop Control at Maximum Limit (Timeout) Table 4. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN /FMI 14 The Fault Indicates Low Diesel Exhaust Fluid (DEF) Delivery NOx Conversion Efficiency Closed Loop DEF Dosing Always Enabled Two Seconds Parked SCR Efficiency Test Check as follows: 1. Connect DiagnosticLink. 2. Using a refractometer from the DEF Test Kit W , measure the DEF percentage. Is DEF percentage between 31 and 34%? a. Yes; Go to step 3. b. No; clean/flush the DEF tank. Go to step 4. Refer to section "Flushing of the Diesel Exhaust Fluid System". Verify repair. 3. Remove the DEF dosing unit. Do not disconnect the DEF lines or electrical connector. Refer to section "Removal of the Diesel Exhaust Fluid Dosing Unit". 4. Perform DEF Quantity Test service routine and record the amount of DEF dispensed. Is the dispensed DEF fluid level between 108 and 132 ml? a. Yes; Go to step 5. b. No; replace the DEF dosing unit. To verify repairs, Refer to section "Removal of the Diesel Exhaust Fluid Dosing Unit". Go to step Install the DEF dosing unit. Refer to section "Installation of the Diesel Exhaust Fluid Dosing Unit ". 6. Disconnect the DEF dosing unit electrical connector. NOTE: SPN 3361/FMI 5 will set when the DEF dosing unit electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing unit electrical connector is reconnected. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. 7. Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17" All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

12 4 SPN /FMI 14 - GHG17 NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed by the troubleshooting. 8. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; Go to step 11. b. No; replace the inlet NOx sensor. For 1-Box, Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Go to step 9. For Two-Box, Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Go to step Run a parked regen to verify both sensors are reading within 50 ppm of each other. NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. 10. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; Go to step 11. b. No; replace the outlet NOx sensor. For 1-Box, Refer to section "Removal of the Selective Catalytic Reduction Outlet NOx Sensor". Go to step 11. For Two-Box, Refer to section "Removal of the Selective Catalytic Reduction Outlet NOx Sensor". Go to step Reconnect the DEF dosing unit electrical connector. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. 12. Start the engine and perform a Parked SCR Efficiency test to clear fault and verify repairs. 14 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

13 SPN 3216/FMI 16 GHG17 Selective Catalyst Reduction Inlet NOx Sensor - Drift Low Table 5. Description Monitored Parameter Typical Enabling Conditions (Common Subset for all Engines) Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification NOx Sensor Plausibility Check Aftertreatment Inlet NOx Sensor SPN 3216/FMI 16 General Enabling Condition: Engine is not in regeneration and operating at high speed and loads Specific Enabling Conditions: (see below): Engine Parameter Min Max Engine Speed (rpm) Torque (N m) Battery Voltage (Volts) Engine Coolant Outlet Temperature Ambient Temperature Barometric Pressure (mbar) Time Since DPF regen (min.) 15 Beginning of Injection (BOI) - Degrees of Crankshaft Rotation EGR Mass (Kg/min) 5 70 C (158 F) -8 C (17.6 F) 755 mbar (11 psi) 10 Continuous When Enabling Conditions Met 150 seconds (Two-Cycle) MIL Parked SCR Efficiency Test Check as follows: 1. Connect DiagnosticLink. 2. Are any other faults also present? a. Yes; repair those fault codes first. b. No; Go to step Monitor (chart) the following parameters: ASL102 engine speed AS018 Selective Catalyst Reduction (SCR) inlet temperature AS019 SCR outlet temperature AS035 SCR inlet NOx sensor AS036 SCR outlet NOx sensor AS101 NOx conversion efficiency NOTICE: Do not attempt to operate engine with the DEF lines disconnected. DEF pump runs and circulates DEF through the system at a limited rate (default) to aid in system cooling. 4. Disconnect the Diesel Exhaust Fluid (DEF) Dosing Unit electrical connector only. Leave Dosing Unit bolted to Aftertreatment and DEF lines connected. 5. Inspect the DEF dosing unit harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Are any signs of damage present? a. Yes; repair as necessary. Go to step 27. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

14 5 SPN 3216/FMI 16 GHG17 b. No; Go to step 6. NOTE: SPN 3361/FMI 5 will set when the DEF dosing unit electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing unit electrical connector is reconnected. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. 6. Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17". NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed by the troubleshooting. 7. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; Go to step 8. b. No; replace the Selective Catalyst Reduction Inlet NOx Sensor. Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Verify repairs. 8. Turn the ignition OFF. 9. Perform Charge Air Cooler (CAC) inspection and leak test. Refer to OEM literature for procedure. Is there any damage found? a. Yes; Go to step 27. b. No; Go to step Visually inspect the entire Exhaust Gas Recirculation (EGR) and exhaust system (turbine housing, exhaust manifold, etc.) for evidence of external leakage (e.g. soot, coolant deposits at joints). Is there evidence of external leakage? a. Yes; repair as necessary. Go to step 27. b. No; Go to step Remove the delta P sensor from the mounting pad; leave the electrical harness connected. 12. Inspect the delta P sensor for moisture inside the ports. Shake moisture out if necessary; do not replace the sensor. 13. Inspect the delta P venturi ports for clogging and blockage. A layer of soot on the delta P sensor is OK. Is there any blockage found? a. Yes; clean venturi ports. Do not replace delta P sensor. Go to step 27. b. No; Go to step Turn the ignition ON (key ON, engine OFF). 15. Using DiagnosticLink, monitor delta P voltage (pin 109). 16. Is the delta P voltage between 0.55 and 0.83 volts? a. Yes; Go to step 20. b. No; Go to step Turn the ignition OFF. 18. Disconnect the delta P sensor harness connector. 19. Inspect the delta P sensor harness connector for loose, bent, spread, or corroded pins. Is there any pin damage found? 16 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

15 a. Yes; repair as necessary. Go to step 27. b. No; replace delta P sensor. Refer to section "Removal of the Delta P Sensor". Go to step Compare Inlet Manifold Pressure (IMP) value with the barometric pressure value. Are the values within 10.3 kpa (1.5 psi) of each other? a. Yes; Go to step 23. b. No; Go to step Disconnect the intake pressure/temperature sensor. 22. Inspect the intake pressure/temperature sensor and wiring connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Is there any sign of damage present? a. Yes; repair as necessary. Go to step 27. b. No; replace intake pressure/temperature sensor. Refer to section "Removal of the Intake Pressure/Temperature Sensor". Go to step Remove EGR cooler hot pipe, EGR crossover pipe and delivery pipe and inspect for excessive build-up or blockage. Is there excessive build-up or blockage? a. Yes; clean piping and replace EGR cooler. Refer to section "Removal of the DD13 Exhaust Gas Recirculation Cooler Water Manifold Assembly". Go to step 26. b. No; Go to step Inspect the EGR valve for physical damage (broken butterfly, etc.). Is the EGR valve damaged? a. Yes; replace the center section of the exhaust manifold. Go to step 27. Refer to section "Removal of the DD13 and DD15 Exhaust Manifold" Refer to section "Removal of the DD16 Exhaust Manifold" b. No; Go to step Disconnect the inlet NOx sensor harness connector. 26. Inspect the inlet NOx sensor and wiring connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Is any pin damage found? a. Yes; repair as necessary. Go to step 27. b. No; replace the SCR inlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Go to step Verify repairs by performing a Parked SCR Efficiency Test. Refer to section "GHG17 Perform Parked SCR Efficiency Test". All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

16 6 SPN 3216/FMI 18 GHG17 6 SPN 3216/FMI 18 GHG17 Selective Catalyst Reduction Inlet NOx Sensor - Drift Low Table 6. Description Monitored Parameter Typical Enabling Conditions (Common Subset for all Engines) Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 3216/FMI 18 NOx Sensor Plausibility Check Aftertreatment Inlet NOx Sensor General Enabling Condition:Engine is not in regen and operating at high speed and loads Specific Enabling Conditions: Engine Parameter Min Max Engine Speed (rpm) Torque (Nm) Battery Voltage (Volts) Engine Coolant Outlet Temperature Ambient Temperature Barometric Pressure (mbar) 755 Time Since DPF regen (min.) 15 Beginning of Injection (BOI) - Degrees of Crankshaft Rotation EGR Mass (Kg/min) 5 Continuous When Enabling Conditions Met 150 Seconds (2 Cycle) MIL 70 C (158 F) -8 C (17.6 F) Warm Up Engine and Ensure Engine is Not in Regen Mode. Drive a Fully-Loaded Trailer on Highway and Maintain Above Enabling Conditions for 150 Seconds 10 Check as follows: 1. Connect DiagnosticLink. 2. Are any other faults also present? a. Yes; repair those fault codes first. b. No; Go to step Monitor (chart) the following parameters: ASL102 engine speed AS018 Selective Catalyst Reduction (SCR) inlet temperature AS019 SCR outlet temperature AS035 SCR inlet NOx sensor AS036 SCR outlet NOx sensor AS101 NOx conversion efficiency NOTICE: Do not attempt to operate engine with the DEF lines disconnected. DEF pump runs and circulates DEF through the system at a limited rate (default) to aid in system cooling. 4. Disconnect the Diesel Exhaust Fluid (DEF) dosing unit electrical connector only. Leave dosing unit bolted to aftertreatment and DEF lines intact. 18 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

17 NOTE: SPN 3361/FMI 5 will set when the DEF dosing unit electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing unit electrical connector is reconnected. 5. Inspect the DEF dosing unit harness connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Are there any signs of damage present? a. Yes; repair as necessary. Go to step 34. b. No; Go to step 6. NOTE: Running the engine with a disconnected DEF dosing unit will induce a fault code. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. 6. Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17". NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed by the troubleshooting. 7. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; check for turbocharger type. If Asymmetrical Turbocharger (AT), Go to step 8. If Turbo Compound (TC), Go to step 16. b. No; replace the inlet NOx sensor. For 1-Box, Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor" For 2-Box, Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Verify repair. 8. Turn the ignition OFF. 9. Ensure the vehicle air supply is at least 6.0 bar (87 psi). Inspect the air line connection to the wastegate solenoid. Are there any leaks or kinks in the air line connection? a. Yes; repair or replace as necessary. Go to step 35. b. No; Go to step Inspect the wastegate actuator and the plumbing to and from the actuator. Verify wastegate opens and closes. Is there any binding or damage found? a. Yes; repair as necessary. Go to step 35. b. No; Go to step Turn the ignition ON (key ON, engine OFF). NOTE: Wastegate control does not respond at 50 percent. To cycle wastegate, use either 0 percent or 95 percent. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

18 6 SPN 3216/FMI 18 GHG Using DiagnosticLink, activate wastegate control from Service Routines Activate Outputs Panel. Run slide control up to 95% - (Click Set). Wastegate will open with air psi available. Observe wastegate linkage movement. Does wastegate open when commanded? a. Yes; Go to step 13. b. No; Go to step Move slide control down to 0. Observe wastegate linkage movement. Does wastegate close when commanded? a. Yes; Go to step 16. b. No; Go to step Disconnect the wastegate solenoid harness connector. 15. Inspect the wastegate solenoid and harness connector for signs of damaged, bent, spread, corroded, or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Is there any damage present? a. Yes; repair as necessary. Go to step 35. b. No; replace the wastegate solenoid. Refer to section "Removal of the DD13 Wastegate Solenoid." Go to step 35. Refer to section "Removal of the GHG17 DD15 Asymmetrical Turbocharger Wastegate Solenoid." Go to step Turn the ignition OFF. 17. Perform Charge Air Cooler (CAC) inspection and leak test. Refer to OEM literature for procedure. Is there any damage found? a. Yes; repair as necessary. Go to step 35. b. No; Go to step Visually inspect the entire Exhaust Gas Recirculation (EGR) and exhaust system (turbine housing, exhaust manifold, etc.) for evidence of external leakage (e.g. soot, coolant deposits at joints). Is there any external leakage found? a. Yes; repair as necessary. Go to step 35. b. No; Go to step Remove the delta P sensor from the mounting pad; leave the electrical harness connected. 20. Inspect the delta P sensor for moisture inside the ports. Shake moisture out if necessary; do not replace the sensor. 21. Inspect the delta P venturi ports for clogging and blockage. A layer of soot on the delta P sensor is OK. Is there any blockage found? a. Yes; clean venturi ports. Do not replace delta P sensor. Go to step 35. b. No; Go to step Turn the ignition ON (key ON, engine OFF). 23. Using DiagnosticLink, monitor delta P voltage (pin 109). 24. Is the delta P voltage between 0.55 and 0.83 volts? a. Yes; Go to step 28. b. No; Go to step Turn the ignition OFF. 26. Disconnect the delta P sensor harness connector. 27. Inspect the delta P sensor harness connector for loose, bent, spread, or corroded pins. Is there any pin damage found? a. Yes; repair as necessary. Go to step 35. b. No; replace delta P sensor. Refer to section "Removal of the Delta P Sensor". Go to step Compare Intake Manifold Pressure (IMP) value with the barometric pressure value. Are the values within 10.3 kpa (1.5 psi) of each other? a. Yes; Go to step 31. b. No; Go to step Disconnect the intake pressure/temperature sensor. 30. Inspect the intake pressure/temperature sensor and wiring connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Are there any signs of damage present? a. Yes; repair as necessary. Go to step 35. b. No; replace IMP sensor. Refer to section "Removal of the Intake Pressure/Temperature Sensor". Go to step Remove EGR cooler hot pipe, EGR crossover pipe and delivery pipe; inspect for excessive build-up or blockage of soot. Is there any excessive build-up or blockage of soot? 20 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

19 a. Yes; clean piping and replace EGR cooler. Refer to section "Removal of the DD13 Exhaust Gas Recirculation Cooler Water Manifold Assembly". Go to step 34. b. No; Go to step Inspect the EGR valve for physical damage (broken butterfly, etc.). Is the EGR valve damaged? a. Yes; replace the center section of the exhaust manifold. Refer to section "Removal of the DD13 and DD15 Exhaust Manifold". Go to step 34. Refer to section "Removal of the DD16 Exhaust Manifold". Go to step 35. b. No; Go to step Disconnect the NOx inlet sensor harness connector. 34. Inspect the inlet NOx sensor and wiring connector for signs of damaged, bent, spread, corroded or unseated (pushed out) pins and signs of moisture in the connector or wire damage near the connector. Is any pin damage found? a. Yes; repair as necessary. Go to step 35. b. No; refer to 15 TS-17 ( for additional MCM programming. 35. Verify repairs by warming up engine and ensure engine is not in regeneration mode. Drive with a fully loaded trailer on highway and maintain a steady speed and load for ten minutes. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

20 7 SPN 3217/ FMI 2 - GHG17 7 SPN 3217/ FMI 2 - GHG17 Lambda Reading Rationality Check Table 7. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 3217/FMI 2 Goal of this Diagnostic is to Detect the Engine Out Lambda Signal Lower Than Expected in Engine No-Fueling Mode Inlet NOx Sensor Engine at 1200 to 2400 rpm Above 40% load In DEF Dosing Mode Coolant Temp Above 65 C (149 F) Ambient Air Temp Above -18 C (0 F) Ambient Pressure Above 752 mbar (10.9 psi) Average SCR temp greater than 240 C (464 F) Not in EGR Mode Not in Regen Mode Inlet NOx Sensor Continuous When Enabling Conditions Met 10 Seconds MIL Road Test at Operating Temperature with Engine Above 1200 rpm, Above 40% Load, in DEF Dosing Mode. Not in Regen or EGR Mode. Check as follows: To avoid injury, never remove any engine component while the engine is running. To avoid injury from hot surfaces, wear protective gloves, or allow engine to cool before removing any component. 1. Connect DiagnosticLink. Are there any other fault codes? a. Yes; repair other fault codes first. b. No; Go to step Check the ACM software level and fuel maps. The ACM software should be with fuel map ZGS002 or higher. Is the software and fuel map up to date? a. Yes; Go to step 3. b. No, connect to the server and update the ACM software and fuel map. Verify the repair and release the vehicle. 3. Since no other active faults are present and the software is up to date, replace the Inlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". Verify repair. 22 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

21 SPN 3217/ FMI 7 - GHG17 Inlet NOx Sensor Circuit Range/Performance Bank 1 Sensor 1 Table 8. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 3217/FMI 7 Goal of This Diagnostic is to Detect The Engine Out Lambda Signal Lower Than Expected in Engine No-Fueling Mode Inlet NOx Sensor Engine at 1200 to 1800 rpm Above 40% Load In DEF Dosing Mode Coolant Temp Above 65 C (149 F) Ambient Air Temp Above -18 C (0 F) Ambient Pressure Above 752 mbar (10.9 psi) Not in EGR Mode Not in Regen Mode Inlet NOx Sensor vs. Outlet NOx Sensor Continuous When Enabling Conditions Met 1.2 Seconds MIL Road Test at Operating Temperature With Engine Above 1200 rpm, Above 40% Load, in DEF Dosing Mode. Not in Regen or EGR Mode Check as follows: To avoid injury, never remove any engine component while the engine is running. To avoid injury from hot surfaces, wear protective gloves, or allow engine to cool before removing any component. 1. Connect DiagnosticLink. Are there any other fault codes? a. Yes; repair other fault codes first. b. No; Go to step Was another emission component-related fault code repaired prior to this step? a. Yes; perform a parked regeneration to verify repairs and clear fault codes. b. No; Go to step Are any Exhaust Gas Recirculation (EGR) system faults also present? a. Yes; repair the EGR system faults first. b. No; Go to step Visually inspect the entire air inlet, Charge Air Cooler (CAC), and EGR piping and hose for visible signs of leaks or damage. Was any damage or leaks found? a. Yes; repair as necessary. b. No; Go to step Check Aftertreatment System (ATS) for visible exhaust leaks or damage. Is there any damage found? All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

22 8 SPN 3217/ FMI 7 - GHG17 a. Yes; repair as necessary. b. No; Go to step Use DEF test strip A to check for diesel fuel or oil contamination of the DEF fluid; Refer to section "Checking Diesel Exhaust Fluid Quality". Do the test strips or visual inspection indicate that the DEF is contaminated? a. Yes; for diesel fuel or oil contamination, refer to 13 TS-17 ( ddcsn/13ts17.pdf) and refer to appropriate Original Equipment Manufacturer (OEM) literature for DEF tank cleaning/flushing procedures. Refill the DEF tank with new DEF. Verify repair. b. No; Go to step Using the refractometer from DEF Test Kit W , measure the DEF urea percentage. Is DEF urea percentage between 31 and 34 percent? a. Yes; Go to step 8. b. No; clean/flush the DEF tank and the DEF system. Refer to section "Flushing of the Diesel Exhaust Fluid System". Refill the DEF tank with new DEF. Verify repair. 8. Unbolt the DEF doser from the aftertreatment; do not disconnect the DEF lines or electrical connector. 9. Use the graduated cylinder provided in DEF test kit W , perform a DEF quantity test. Refer to section "Diesel Exhaust Fluid Quantity Test - GHG17". 10. Monitor the amount of DEF dispensed. Is the amount of DEF dispensed between 108 and 132 ml (3.7 and 4.5 oz.)? a. Yes; Go to step 11. b. No; replace the DEF dosing unit. Refer to section "Installation of the Diesel Exhaust Fluid Dosing Unit ". Verify repair. 11. Reinstall the DEF doser. Go to step Disconnect the DEF doser electrical connector. Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. NOTE: SPN 3361/FMI 5 will set when the DEF dosing unit electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing unit electrical connector is reconnected. 13. Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17". 14. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the NOx sensors reading within 50 ppm of each other? a. Yes; Go to step 15. b. No; replace the SCR inlet NOx sensor and connect the DEF doser electrical connector. Verify repair. 15. Disconnect the DEF dosing unit electrical connector. Go to step All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

23 Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. 16. Start the engine and perform a parked regeneration and monitor the NOx efficiency. Is the NOx efficiency above 80%? a. Yes; this fault was likely caused by the DEF build-up in the exhaust which was cleared by the parked regeneration procedures. Release the vehicle. NOTE: Excessive DEF build-up in the exhaust can be caused by a vehicle with a high speed, high average drive load. b. No; Go to step Perform a low temperature Aftertreatment Device (ATD) check using DiagnosticLink to check for a drifted temperature sensor. Refer to section "GHG17 Perform Performance Check - Low Temperature ATD". Monitor the SCR inlet and SCR outlet temperatures; they should be within 25 C (45 F) during the last five minutes of this test. Replace the drifted SCR temperature sensor and verify repair. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

24 9 SPN 3226/FMI 20 - GHG17 9 SPN 3226/FMI 20 - GHG17 Selective Catalyst Reduction Outlet NOx Sensor - Drift Low Table 9. Description Monitored Parameter SPN 3226/FMI 20 Selective Catalyst Reduction (SCR) Outlet NOx Sensor Drift Low Engine Out NOx Typical Enabling Conditions The Following Must Be True for greater than 30s: Fuel Mass is 0, Diesel Particulate Filter (DPF) Outlet Temperature greater than 200 C (392 F), Battery Voltage greater than 10V DC, Engine Speed 500 to 2100 rpm Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification Always Enabled Five Seconds MIL Parked Regeneration Check as follows: 1. Connect DiagnosticLink. 2. Turn the ignition ON (key ON, engine OFF). 3. Check for multiple fault codes. Are there any other fault codes present for the SCR outlet NOx sensor? a. Yes; diagnose the other fault codes first. b. No; Go to step Inspect the Aftertreatment System (ATS) for exhaust leaks. Are there any leaks present? a. Yes; repair the exhaust leaks. Verify repair. b. No; Go to step Inspect the ATS for damage. Is there any damage present? a. Yes; repair as necessary. b. No; Go to step Turn the ignition OFF. 7. Disconnect the DEF doser electrical connector. Diesel engine exhaust and some of its constituents are known to the State of California to cause cancer, birth defects, and other reproductive harm. Always start and operate an engine in a well ventilated area. If operating an engine in an enclosed area, vent the exhaust to the outside. Do not modify or tamper with the exhaust system or emission control system. To avoid injury before starting and running the engine, ensure the vehicle is parked on a level surface, parking brake is set, and the wheels are blocked. 26 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

25 WARNING: ENGINE EXHAUST To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area. Engine exhaust is toxic. WARNING: HOT EXHAUST During parked regeneration the exhaust gases will be extremely HOT and could cause a fire if directed at combustible materials. The vehicle must be parked outside. NOTE: Fault code SPN 3361/FMI 5 will become present when the Diesel Exhaust Fluid (DEF) doser electrical connector is disconnected. This code can be cleared using DiagnosticLink once the DEF doser electrical connector is reconnected. 8. Start the engine and perform a complete parked regen. Refer to section "Performing a Parked Regeneration - GHG17". NOTICE: It may require 30 minutes or longer for the outlet NOx sensor to turn on. Do not replace either sensor unless directed by the troubleshooting. 9. Monitor the inlet NOx sensor and outlet NOx sensor. During the last five minutes of the parked regen, are the sensors reading within 50 ppm of each other? a. Yes; for 1-BOX, replace the DOC/SCR module. Refer to section "Removal of the 1-BOX from the Vehicle". Verify repair. For a Two-Box option, replace the SCR. Refer to section "Removal of the 2-BOX (2V2) Selective Catalytic Reduction (SCR) Catalyst From the Stanchion". Verify repair. b. No; replace the SCR outlet NOx sensor. For 1-Box, Refer to section "Removal of the Selective Catalytic Reduction Outlet NOx Sensor".Verify repair. For 2-Box, Refer to section "Removal of the Selective Catalytic Reduction Outlet NOx Sensor".Verify repair. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

26 10 SPN 3227/FMI 2 - GHG17 10 SPN 3227/FMI 2 - GHG17 Lambda Reading Rationality Check Table 10. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamp Engine Reaction Verification SPN 3227/FMI 2 Goal of this Diagnostic is to Detect the Tail Pipe Out Lambda Signal Lower Than Expected in Engine No Fueling Mode Outlet NOx Sensor Engine at 1200 to 2400 rpm Averaged SCR temperature greater than 240 C (464 F) In DEF Dosing Mode Coolant Temp Above 65 C (149 F) Ambient Air Temp Above -18 C (0 F) Ambient Pressure Above 752 mbar (10.9 psi) Not in EGR Mode Not in Regen Mode Outlet NOx Sensor Continuous When Enabling Conditions Met 10 Seconds MIL Road Test at Operating Temperature with Engine Above 1200 rpm, Above 40% Load, in DEF Dosing Mode. Not in Regen or EGR Mode Check as follows: To avoid injury from hot surfaces, wear protective gloves, or allow engine to cool before removing any component. 1. Connect DiagnosticLink. Are there any other fault codes? a. Yes; repair other fault codes first. b. No; Go to step Check the ACM software level and fuel maps. The ACM software should be with fuel map ZGS002 or higher. Is the software and fuel map up to date? a. Yes; Go to step 3. b. No, connect to the server and update the ACM software and fuel map. Verify the repair and release the vehicle. 3. Since no other active faults are present and the software is up to date, replace the Outlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Outlet NOx Sensor". 28 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

27 GHG17 Perform Performance Check - Low Temperature ATD The Low Temperature ATD service routine was developed to help diagnose Aftertreatment issues. The routine will help diagnose temperature sensor drift issues. The service routine is not a Parked Regeneration. The routine will look similar to a Parked Regeneration but there will be NO HC dosing during this routine. The routine needs to be manually started, and will automatically stop after 30 minutes. DiagnosticLink will automatically turn off HC dosing during this routine. To run the routine: 1. Navigate to the DPF System Panel, under Service Routines. Open the drop-down window and select the Perform Performance Check - Low Temp ATD. 2. Start the service routine. The engine speed will increase to 1250 rpm for this routine. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION

28 11 GHG17 Perform Performance Check - Low Temperature ATD 3. Once the engine coolant temperature reaches 50 C (126 F), the engine brake will activate (100% PWM). 4. The system will continue to warm up. Once the DOC inlet temperature reaches 270 C (518 F), the HC dosing system will turn on. The HC dosing system will perform its safety check with no HC dosing. The Fuel Doser Injection Status (in yellow) will go to 100%, then back to 0% for the remainder of the routine. 30 All information subject to change without notice. Copyright 2016 DETROIT DIESEL CORPORATION

29 Navigate to the SCR Service Routines Panel. The DOC Inlet, DOC Outlet, DPF Outlet, SCR Inlet (calculated value based on DPF outlet and SCR outlet on the 1-BOX) and SCR Outlet temperatures should stabilize in the mid-to-upper 375 C (700 F) range. 6. Once the temperatures stabilize (should occur within 25 to 30 minutes into the service routine), compare all temperature sensor values. They should read within 27 C (45 F) of each other. If the values are outside the 27 C (45 F) range, the temperature sensor has possibly drifted high or low. 7. The service routine will automatically stop after 30 minutes. All information subject to change without notice Copyright 2016 DETROIT DIESEL CORPORATION 31