Additions, Revisions, or Updates

Transcription

1 SUBJECT DATE SPN 625/FMI 9 EPA10 - GHG14 June 2013 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 EPA10/ GHG14 DD Platform SPN 625/FMI 9 EPA10 - GHG14 ACM, MCM, and CPC are referred to generically because this procedure now covers more than one year. All information subject to change without notice. 3

2 2 SPN 625/FMI 9 - EPA10 - GHG14 2 SPN 625/FMI 9 - EPA10 - GHG14 This diagnostic is typically Motor Control Module (MCM) Message Not Received or Has Stopped Arriving. Table 1. Description Monitored Parameter Typical Enabling Conditions Monitor Sequence Execution Frequency Typical Duration Dash Lamps Engine Reaction SPN 625/FMI 9 MCM Message Not Received or Has Stopped Arriving. CAN Communication Always Enabled None Always Enabled 2 Seconds MIL, CEL None Check as follows: 1. Are there any battery voltage faults (any SPN 168 FMI faults)? a. Yes; troubleshoot battery voltage faults first. b. No; Go to step 2. NOTE: Main battery power must be left ON. NOTE: The five minute time-frame allows the ACM to go completely offline. 2. Has the Aftertreatment Control Module (ACM), Motor Control Module (MCM), or Common Powertrain Controller (CPC) been recently programmed? a. Yes; clear the fault codes. If faults do not become active, release the vehicle. If faults become active, Go to step 3. b. No; clear the fault codes. If faults do not become active, release the vehicle. If faults become active, Go to step Turn ignition OFF and wait five minutes before proceeding. 4. Disconnect the MCM 120-pin connector and inspect connector for corrosion, or oil, fuel or water intrusion. b. If no contamination is found, Go to step Measure the resistance across pins 13 and 19 of the MCM 21-pin electrical harness connector. 4 All information subject to change without notice. Copyright 2013 DETROIT DIESEL CORPORATION

3 a. If the resistance is greater than 80 ohms, Go to step 6. b. If the resistance is between 70 to 50 ohms, reconnect the MCM 21-pin connector and clear codes. Verify repairs. If fault returns, Go to step 6. c. If the resistance is less than 50 ohms, replace the Powertrain Controller Area Network (PTCAN) harness. Refer to OEM procedures. 6. Measure the resistance between the MCM 21-pin connector pin 19 and ground. a. If the resistance is greater than 10K ohms, Go to step 7. b. If the resistance is less than 10K ohms, repair the wire short to ground between MCM 21-pin connector pin 19 and of the ACM 21-pin connector pin Measure the resistance between of the MCM 21-pin connector pin 13 and ground. a. If the resistance is greater than 10K ohms, Go to step 8. b. If the resistance is less than 10K ohms, repair the wire short to ground between MCM 21-pin connector pin 19 and of the ACM 21-pin connector pin 10. Verify repairs. 8. Disconnect ACM 120-pin connector and inspect connector for corrosion, or oil, fuel or water intrusion. b. If no contamination is found, Go to step Check ACM internal terminating resistor by measuring and recording the resistance across pins 10 and 20 of the ACM 21-pin connector. All information subject to change without notice. 5

4 2 SPN 625/FMI 9 - EPA10 - GHG14 a. If the resistance is 110 to 130 ohms, go to Go to step 10. b. If the resistance is not between 110 to 130 ohms, replace the ACM. 10. Measure the resistance between of the MCM 21-pin connector pin 19 and of the ACM 21-pin connector pin 20. a. If the resistance is less than 5 ohms, Go to step 11. b. If the resistance is greater than 5 ohms, repair the wire between MCM 21-pin connector pin 19 and of the ACM 21-pin connector pin Measure the resistance between the MCM 21-pin connector pin 13 and of the ACM 21-pin connector pin 10. a. If the resistance is less than 5 ohms, Go to step 12. b. If the resistance is greater than 5 ohms, repair the wire between MCM 21-pin connector pin 13 and of the ACM 21-pin connector pin 10. Verify repairs. 12. Disconnect the CPC electrical harness connector #3. Inspect connector for corrosion, rust or water intrusion. b. If no contamination is found, Go to step Check CPC internal terminating resistor by measuring and recording the resistance across pins 19 and 21 of the CPC electrical harness connector cavity #3. a. If the resistance is 110 to 130 ohms, Go to step All information subject to change without notice. Copyright 2013 DETROIT DIESEL CORPORATION

5 b. If the resistance is not between 110 to 130 ohms, replace the CPC. 14. Check the resistance between CPC connector #3 pin 19 and ACM 21-pin connector pin 20. a. If the resistance is less than 5 ohms, Go to step 15. b. If the resistance is greater than 5 ohms, repair the wire between CPC connector #3 pin 19 and the ACM 21-pin connector pin Measure the resistance between CPC connector #3 pin 21 and ACM 21-pin connector pin 10. a. If the resistance is less than 5 ohms, Go to step 16. b. If the resistance is greater than 5 ohms, repair the wire between CPC connector #3 pin 21 and ACM 21-pin connector pin Measure the resistance between CPC connector #3 pin 19 and MCM 21-pin connector pin 19. a. If the resistance is less than 5 ohms, Go to step 17. b. If the resistance is greater than 5 ohms, repair the wire between CPC connector #3 pin 19 and MCM 21-pin connector pin Measure the resistance between CPC connector #3 pin 21 and MCM 21-pin connector pin 13. a. If the resistance is less than 5 ohms, install a test MCM and retest. If code does not return, replace MCM. Verify repairs. b. If the resistance is greater than 5 ohms, repair the wire between CPC connector #3 pin 21 and MCM 21-pin connector pin 13. All information subject to change without notice. 7