SPN 4364 (ACM)(EPA10); SPN 4364 (ACM)(GHG14) January Publication Number / Title Platform Section Title Change SPN 4364/FMI 18 - EPA10

Transcription

1 SUBJECT DATE SPN 4364 (ACM)(EPA10); SPN 4364 (ACM)(GHG14) January 2018 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 DD Platform SPN 4364/FMI 18 - EPA10 SPN 4364/FMI 18 - GHG14 Diagnostics have been updated. 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. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION

2 2 SPN 4364/FMI 18 - EPA10 2 SPN 4364/FMI 18 - EPA10 Selective Catalyst Reduction NOx Conversion Low Table 1. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps SPN 4364/FMI 18 This Fault Code Sets When the Aftertreatment Control Module (ACM) Detects that the NOx Conversion is Lower than a Calibrated Threshold Selective Catalyst Reduction (SCR) Inlet NOx Sensor, SCR Outlet NOx Sensor Diesel Exhaust Fluid (DEF) Dosing Enabled, 1000 to 1500 rpm, 15 to 100% load, SCR Inlet Temperature Sensor less than 650 C (1200 F), Ambient Temperature Greater Than 0 C (32 F), Coolant Temperature Greater Than 70 C (158 F), Non-regeneration Conditions Present None Continuous When Enabling Conditions Met 30 Minutes Engine Reaction Derate 25% Verification Check as follows: MIL Parked Regeneration 1. Connect DiagnosticLink. 2. Turn the ignition ON (key ON, engine OFF). 3. Was another emission component-related fault code repaired prior to this step? 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. WARNING: PERSONAL INJURY 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. a. Yes; perform a parked regeneration and recheck for the fault code. If the fault code returns, Go to step 4. b. No; Go to step Check for other fault codes. Are there any air management system fault codes present for the Intake Throttle Valve (ITV), Intake Manifold Pressure (IMP), Intake Air Temperature (IAT), turbocharger, etc.? a. Yes; diagnose the other fault codes first. b. No; Go to step Are there any Exhaust Gas Recirculation (EGR) system fault codes present? 4 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

3 a. Yes; diagnose the other fault codes first. b. No; Go to step Are there any other NOx sensor fault codes present? a. Yes; diagnose the other fault codes first. b. No; Go to step Are there any fault codes for the DEF metering unit, DEF pump, or DEF air valve present? a. Yes; diagnose the other fault codes first. b. No; Go to step Are there any ACM temperature or pressure fault codes present? a. Yes; diagnose those fault codes 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 13 TS-17 ( 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 a refractometer from the DEF Test Kit W , measure the DEF percentage. Refer to section "Checking Diesel Exhaust Fluid Quality". Is DEF percentage between 31% and 34%? a. Yes; Go to step 12. b. No; flush the DEF system. Refer to section "Flushing of the Diesel Exhaust Fluid System". Verify repair. 12. Turn the ignition ON (key ON, engine OFF). 13. Obtain the barometric pressure reading for your area, compare your barometric pressure reading to the barometric pressure reading in DiagnosticLink. Are the pressures within 1 psi of each other? a. Yes; Go to step 14. b. No; replace the MCM. Refer to section "Removal of the Motor Control Module". Go to step Compare the DEF pressure sensor reading to the barometric pressure sensor reading. Are the readings within 4.3 psi of each other? a. Yes; Go to step 15. b. No; replace the DEF pressure sensor. Refer to section "Removal of the Diesel Exhaust Fluid Pressure Sensor". Verify repair. NOTE: The bladder pressure should never be checked, just filled. By checking the bladder pressure only once, you can deplete as much as 50% of the stored pressure. 15. Verify the DEF pump air bladder is inflated to 40 to 46 psi by using an air chuck with a built-in gauge. Go to step Perform the DEF quantity service routine. Refer to section "Diesel Exhaust Fluid Quantity Test - EPA10". Go to step Monitor the amount of DEF dispensed into the DEF-safe container included in DEF test kit W Is the amount of DEF dispensed between 102 and 138 ml? a. Yes; Go to step 18. b. No; flush the DEF metering unit. Verify repair. NOTE: SPN 3361/FMI 5 will set when the DEF dosing valve electrical connector is disconnected. The fault code can be cleared using DiagnosticLink after the DEF dosing valve electrical connector is reconnected. 18. Disconnect the DEF dosing valve 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. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION

4 2 SPN 4364/FMI 18 - EPA10 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: PERSONAL INJURY 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. 19. Start the engine. 20. Run the EPA10 Perform Performance Check - Low Temperature ATD procedure to check the NOx sensors. Refer to section "EPA10 Perform Performance Check - Low Temperature ATD". Are the inlet NOx sensor and the outlet NOx sensor readings within 50 Parts Per Million (PPM) of each other? a. Yes; Go to step 22. b. No; replace the outlet NOx sensor. Go to step Run the EPA10 Perform Performance Check - Low Temperature ATD procedure to validate the NOx sensors are reading correctly. Refer to section "EPA10 Perform Performance Check - Low Temperature ATD". Are the inlet NOx sensor and outlet NOx sensor readings within 50 Parts Per Million (PPM) of each other? a. Yes; Go to step 22. b. No; replace the inlet NOx sensor. Go to step Reconnect the DEF dosing valve 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. WARNING: PERSONAL INJURY 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 while monitoring the NOx efficiency. Is the NOx efficiency above 70%? a. Yes; clear codes and release the vehicle. b. No; Go to step Review the last seven minutes of the parked regeneration log data; the illustration below identifies the last seven minutes of the parked regen. Is the Selective Catalyst Reduction (SCR) inlet temperature lower than SCR outlet temperature? a. Yes; Go to step 25. b. No, replace the ATD. For a 1-Box configuration, replace the DOC/SCR module. For a Two-Box option, replace the SCR module. Complete the ATD checklist to identify cause of failure. Refer to section "ATD Checklist - EPA10". 6 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

5 Is the temperature difference greater than 38 C (68.4 F)? Example: SCR Outlet temp C (1090 F) minus SCR Inlet Temp C (749 F) = 133 C (241 F). The difference between inlet and outlet temperature is 133 C 241 F), which is greater than 38 C (68.4 F). a. Yes; Go to step 26. b. No, replace the ATD. For a 1-Box configuration, replace the DOC/SCR module. For a Two-Box option, replace the SCR module. Complete the ATD checklist to identify cause of failure. Refer to section "ATD Checklist - EPA10". 26. Perform a low temperature Aftertreatment Device (ATD) check using DiagnosticLink to check for a drifted temperature sensor. Refer to section "EPA10 Perform Performance Check - Low Temperature ATD". Are the SCR inlet and SCR outlet temperatures within 25 C (45 F) during the last five minutes of this test? a. Yes; for a 1-Box configuration, replace the DOC/SCR module. This indicates internal structural damage, see image below. The ATD checklist is NOT required since the ATD is the primary failed part. b. No; replace the drifted SCR temperature sensor and verify repair. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION

6 2 SPN 4364/FMI 18 - EPA10 8 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

7 SPN 4364/FMI 18 - GHG14 SCR NOx Conversion Efficiency Low Table 2. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN 4364/FMI 18 This Code Sets When the Aftertreatment Control Module (ACM) detects That the Selective Catalyst Reduction (SCR) NOx Conversion Efficiency is Low SCR Inlet NOx Sensor and SCR Outlet NOx Sensor Diesel Exhaust Fluid (DEF) Dosing Enabled, 1000 to 2100 rpm, 15 to 100% Load None Continuous When Enabling Conditions Met 30 Minutes MIL None Parked Regeneration Possible causes: Contaminated DEF Incorrect concentration of urea in the DEF Biased NOx sensor Excessive DEF build-up inside the SCR mixing chamber Overtemp aftertreatment Improper DPF maintenance Internal structure failure of 1-Box NOTE: You may also refer to the video on DDCSN Support/Multimedia/EPA10/GHG14 Code SPN: 4364, FMI: 18 Troubleshooting for further information. Refer to ( 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. 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 2018 DETROIT DIESEL CORPORATION

8 3 SPN 4364/FMI 18 - GHG14 7. Was another emission component-related fault code repaired prior to this step? 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. WARNING: PERSONAL INJURY 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. a. Yes; perform a parked regeneration to verify repairs and clear fault codes. b. No; Go to step Are there any ACM temperature or pressure fault codes present? a. Yes; diagnose those faults 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 13 TS-17 ( 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. Refer to section "Flushing of the Diesel Exhaust Fluid System". Is DEF urea percentage between 31 and 34 percent? a. Yes; Go to step 12. 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. 12. Turn the ignition ON (key ON, engine OFF). 13. 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. 10 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

9 Figure 1. Normal DEF Crystallization In The DEF Doser Port Hole 15. Use the graduated cylinder provided in DEF test kit W and perform a DEF quantity test service routine; Refer to section "Diesel Exhaust Fluid Quantity Test - GHG14". 16. Monitor the amount of DEF dispensed into the DEF-safe container. Is the amount of DEF dispensed between 108 to 132 ml (3.7 to 4.5 oz.)? a. Yes; Go to step 17. b. No; replace the DEF dosing unit, using a new gasket and bolts, as these parts are one-time-use components. Refer to section "Removal of the GHG14 Dosing System Doser". Verify repair. 17. DEF crystallization buildup inside the SCR mixing chamber will cause poor NOx conversion efficiency. Use a scope to see inside the DEF port for excessive DEF accumulation within the mixing chamber. Below are examples of normal and excessive amounts of DEF in the mixing chamber. Is there an excessive amount of DEF present in the mixing chamber? a. Yes; Go to step 22. b. No; reinstall the DEF dosing unit, using a new gasket and bolts, as these parts are one-time-use components. Refer to section "Installation of the GHG14 Dosing System Doser. Go to step 18. Below are examples of normal DEF crystallization inside the SCR mixing chamber. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION

10 3 SPN 4364/FMI 18 - GHG14 1. Looking inside SCR Mixing Chamber with DPF removed. Note: Doser Port Location 1. Doser Port 12 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

11 Below are examples of excess DEF crystallization inside the SCR mixing chamber. Table 3. NOTICE: This can be seen by looking inside the mixing chamber through the DEF doser mounting port. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION 13

12 3 SPN 4364/FMI 18 - GHG14 1. Doser Port, restricted by solid mass of crystalized DEF. 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. WARNING: PERSONAL INJURY 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. 18. Start and run a complete Parked Regeneration. Chart the following sensors; Inlet NOx Sensor, Outlet NOx Sensor and NOx Conversion Efficiency. 19. Review the whole parked regen from start to finish. Compare the regen data results to the graphic below. Go to step All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

13 Above is an example of DEF accumulation inside the SCR mixing chamber. This failure is identified by a small spike in the outlet NOx reading. As the regeneration progresses and the excess amount of DEF burns off inside the SCR mixing chamber, the NOx conversion improves. Do the results from the parked regen look similar to the graphic above? a. Yes; Go to step 22. b. No; Go to step 21. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION

14 3 SPN 4364/FMI 18 - GHG Above is also an example of DEF accumulation inside the SCR mixing chamber. Once again, there is a spike in the outlet NOx reading and NOx conversion efficiency drops. The only difference: there was good NOx conversion until the high temperature inside the aftertreatment started to burn off the built-up DEF, causing the sudden drop in NOx conversion efficiency. Do the results from the parked regen look similar to the graphic above? a. Yes; Go to step 22. b. No; Go to step Vehicles with high load duty cycles are more prone to DEF buildup inside the SCR mixing chamber. Install a DEF awning to help eliminate this failure. Refer to section "GHG14 1-BOX Diesel Exhaust Fluid (DEF) Awning". Verify repair. 23. Disconnect the DEF dosing unit electrical connector. NOTE: Running the engine with DEF doser unit electronically disconnected will induce a DEF doser circuit fault code. This code can be erased using DiagnosticLink once the DEF doser electrical connector is reconnected. 24. Run the "GHG14 Perform Performance Check - Low Temp ATD". Let the routine run for 20 minutes. Refer to section "GHG14 Perform Performance Check - Low Temperature ATD". Are the NOx sensor readings within 50 Parts Per Million (PPM) of each other? a. Yes; Go to step 26. b. No; replace the outlet NOx sensor. Refer to section "Removal of the GHG14 Selective Catalyst Reduction Outlet Temperature Sensor". Go to step Run the "GHG14 Perform Performance Check - Low Temperature ATD". Refer to section "GHG14 Perform Performance Check - Low Temperature ATD". Are the inlet and outlet NOx sensor readings within 50 Parts Per Million (PPM) of each other? a. Yes; Go to step 26. b. No; replace the inlet NOx sensor. Refer to section "Removal of the GHG14 Selective Catalytic Reduction Inlet 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. WARNING: PERSONAL INJURY 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. 27. Start the engine and perform a parked regeneration and monitor the NOx efficiency. Is the NOx efficiency above 85%? a. Yes; vehicles with high load duty cycles are more prone to DEF buildup inside the SCR mixing chamber. Install a DEF awning to help eliminate this failure. Refer to section "GHG14 1-BOX Diesel Exhaust Fluid (DEF) Awning". Verify repair. b. No; Go to step Review the last seven minutes of the parked regeneration log data. The illustration below identifies the last seven minutes of the parked regen. 16 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION

15 Is the Selective Catalyst Reduction (SCR) inlet temperature lower than SCR outlet temperature? a. Yes; Go to step 30. 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. Refer to section "ATD Checklist - GHG14". 30. Is the temperature difference greater than 38 C (68.4 F)? Example: SCR Outlet temp C (1090 F) minus SCR Inlet Temp C (749 F) = 133 C (241 F). The difference between inlet and outlet temperature is 133 C (241 F), which is greater than 38 C (68.4 F). a. Yes; Go to step 31. 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. Refer to section "ATD Checklist - GHG14". 31. Review the data from the low temperature Aftertreatment Device (ATD) check in step 24 to check for a drifted temperature sensor. 32. Are the SCR inlet and SCR outlet temperatures within 25 C (45 F) after the 25 minutes? a. Yes; for a 1-Box, replace the DOC/SCR module. This indicates internal structural damage; see image below. The ATD checklist is NOT required since the ATD is the primary failed part. Verify repair. All information subject to change without notice Copyright 2018 DETROIT DIESEL CORPORATION

16 3 SPN 4364/FMI 18 - GHG14 b. No; replace the drifted SCR temperature sensor and verify repair. 18 All information subject to change without notice. Copyright 2018 DETROIT DIESEL CORPORATION