SPN (ACM) (GHG17) and SPN (ACM) (GHG17) February Publication Number / Title Platform Section Title Change

Transcription

1 SUBJECT DATE SPN (ACM) (GHG17) and SPN (ACM) (GHG17) February 2017 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0193 GHG17 Medium Duty SPN /FMI 16 - GHG17 SPN /FMI 14 - GHG17 Procedures 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. 3

2 2 SPN /FMI 16 - GHG17 2 SPN /FMI 16 - GHG17 Selective Catalyst Reduction Closed Loop Control at Maximum Limit (Multiples Sources) Table 1. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction Verification SPN /FMI 16 The Fault Indicates High DEF Delivery NOx Conversion Efficiency Closed Loop DEF Dosing Always Enabled Two Seconds Parked SCR Efficiency Test Check as follows: 1. Connect DiagnosticLink. 2. Check the DEF quality by using the refractometer from the DEF Test Kit W to 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 3. Refer to section "Flushing of the Diesel Exhaust Fluid System". 3. Unbolt the DEF dosing unit from the aftertreatment. Do not disconnect the DEF lines or electrical connector. Refer to section "Removal of the Diesel Exhaust Fluid Dosing Unit". 4. Perform a 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 9. Refer to section "Removal 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. 4 All information subject to change without notice. Copyright 2017 DETROIT DIESEL CORPORATION

3 7. Start the engine. 8. Using Diagnosticslink, start a parked Regen. 9. Let the regen run for 40 to 45 minutes, then start monitoring the SCR inlet NOx sensor and SCR outlet NOx sensor ppm values. Are the NOx sensors reading within 50 ppm of each other? a. Yes; Go to step 10. b. No; replace the inlet NOx sensor. Refer to section "Removal of the Selective Catalytic Reduction Inlet NOx Sensor". 10. Reconnect the DEF dosing unit electrical connector. Go to step Start the engine and perform a Parked SCR Efficiency test to clear the fault. Refer to *section "Perform Parked SCR Efficiency Test". All information subject to change without notice. 5

4 3 SPN /FMI 14 - GHG17 3 SPN /FMI 14 - GHG17 Selective Catalyst Reduction Closed Loop Control at Maximum Limit (Timeout) Table 2. 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. 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 (3.65 and 4.46 oz.)? 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. 6 All information subject to change without notice. Copyright 2017 DETROIT DIESEL CORPORATION

5 7. Using Diagnosticslink, start a parked Regen. NOTICE: It may take 30 minutes or longer for the SCR Outlet NOx sensor to turn on. 8. Let the regen run for 40 to 45 minutes, then start monitoring the SCR inlet NOx sensor and SCR outlet NOx sensor ppm values. 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 Start another parked regen. 10. Let the regen run for minutes, then start monitoring the SCR inlet NOx sensor and SCR outlet NOx sensor ppm values. 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". Verify repair. 11. Reconnect the DEF dosing unit electrical connector. 12. Start the engine and perform a Parked SCR Efficiency test to verify repair. All information subject to change without notice. 7