Additions, Revisions, or Updates

Transcription

1 SUBJECT DATE SPN 1761/FMI 2, 9 - MY13 March 2012 Additions, Revisions, or Updates Publication Number / Title Platform Section Title Change DDC-SVC-MAN-0084 MY13 DD Platform SPN 1761/FMI 2 - MY13 SPN 1761/FMI 9 - MY13 These are new sections. All information subject to change without notice. 3

2 2 SPN 1761/FMI 2 MY13 2 SPN 1761/FMI 2 MY13 This diagnostic is typically Diesel Exhaust Fluid (DEF) Tank Level Sensor Circuit Data Erratic, Intermittent or Incorrect. 1. Check for multiple codes. a. If SPN 1761/3 and 3031/3 are present, Go to step 2. b. If SPN 1761/3 is present, Go to step Disconnect the DEF tank temperature/level sensor. 3. Inspect the DEF tank temperature/level sensor connector for bent, spread or corroded pins. a. If bent, spread or corroded pins are found, repair as necessary. b. If no connector issues are found, Go to step Turn the ignition ON (key ON, engine OFF). 5. Measure the voltage between pin 2 on the harness side of the DEF tank temperature/level sensor and ground. a. If voltage is present, repair short to power between pin 2 on the harness side of the DEF tank temperature/level sensor and pin 102 of the Aftertreatment Control Module (ACM2.1). b. If no voltage is present Go to step Turn the ignition OFF (key OFF, engine OFF). 7. Disconnect the ACM pin connector. 8. Measure the resistance between pin 2 on the harness side of the DEF tank temperature/level sensor and pin 102 of the ACM2.1. a. If the resistance is greater than 5 ohms, repair wire between pin 2 on the harness side of the DEF tank temperature/ level sensor and pin 102 of the ACM2.1. b. If the resistance is less than 5 ohms, refer to OEM literature for DEF tank temperature/level sensor replacement. 9. Disconnect the DEF tank temperature/level sensor. 10. Inspect the DEF tank temperature/level sender connector for bent, spread or corroded pins. a. If bent, spread or corroded pins are found, repair as necessary. b. If no connector issues are found, Go to step Turn the ignition ON (key ON, engine OFF). 12. Measure the voltage between pin 1 on the harness side of the DEF tank temperature/level sensor and ground. a. If voltage is greater than 3.00 volts, repair short to power between pin 1 on the harness side of the DEF tank temperature/level sensor and pin 109 of the ACM2.1. b. If voltage is between 2.0 and 2.95, refer to OEM literature for DEF temperature/level sensor replacement. c. If voltage is less than 2.5 volts, repair wire between pin 1 on the harness side of the DEF temperature/level sensor and pin 109 of the ACM All information subject to change without notice. Copyright 2012 DETROIT DIESEL CORPORATION

3 3 SPN 1761/FMI 9 MY13 This diagnostic is typically Aftertreatment Control Module (ACM2.1) PT-CAN Message Abnormal Update Rate. 1. Are there any battery voltage faults (SPN 168/FMI ANY)? a. Yes, troubleshoot battery voltage faults first. b. No, Go to step Has the ACM2.1/MCM2.1/or CPC4 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 3. NOTICE: Main battery power must be left ON. NOTICE: The five minute time frame allows the ACM2.1 to go completely offline. 3. Turn ignition OFF (key OFF, engine OFF) and wait five minutes before proceeding. 4. Disconnect the MCM pin connector. 5. Measure and record the resistance across pins 13 and 19 of the MCM pin connector. a. If the resistance is greater than 80 ohms, Go to step 6. b. If the resistance is 60 +/- 20 ohms, reconnect the MCM pin connector, Go to step 16. c. If the resistance is less than 5 ohms, replace the PT-CAN harness. 6. Disconnect the ACM pin connector. 7. Check ACM2.1 internal terminating resistor by measuring and recording the resistance across pins 10 and 20 of the ACM pin connector. All information subject to change without notice. 5

4 3 SPN 1761/FMI 9 MY13 a. If the resistance is 120 +/- 10 ohms, Go to step 8. b. If the resistance is not 120 +/- 10 ohms, replace the ACM Disconnect the CPC4 connector #3. 9. Check CPC4 internal terminating resistor by measuring and recording the resistance across pins 19 and 21 of the CPC4 connector cavity #3. a. If the resistance is 120 +/- 10 ohms, Go to step 10. b. If the resistance is not 120 +/- 10 ohms, replace the CPC Check for continuity between CPC4 connector #3 pin 19 and ACM pin connector pin 20. a. If there is continuity, Go to step 11. b. If there is no continuity, repair the wire between CPC4 connector #3 pin 19 and the ACM pin connector pin Measure and record the resistance between CPC4 connector #3 pin 21 and ACM pin connector pin 10. a. If there is continuity, Go to step 12. b. If there is no continuity, repair the wire between CPC4 connector #3 pin 21 and ACM pin connector pin Measure and record the resistance between CPC4 connector #3 pin 19 and MCM pin connector pin 19. a. If there is continuity, Go to step 13. b. If there is no continuity, repair the wire between CPC4 connector #3 pin 19 and MCM pin connector pin Measure and record the resistance between CPC4 connector #3 pin 21 and MCM pin connector pin 13. a. If there is continuity, Go to step 14. b. If there is no continuity, repair the wire between CPC4 connector #3 pin 21 and MCM pin connector pin Measure and record the resistance between of the MCM pin connector pin 19 and of the ACM pin connector pin 20. a. If there is continuity, Go to step 15. b. If there is no continuity, repair the wire between MCM pin connector pin 19 and of the ACM pin connector pin Measure and record the resistance between the MCM pin connector pin 13 and of the ACM pin connector pin 10. a. If there is continuity, contact the Detroit Customer Support Center at b. If there is no continuity, repair the wire between MCM pin connector pin 13 and of the ACM pin connector pin Disconnect the ACM pin connector. 17. Turn the ignition ON (key ON, engine OFF). 18. Measure the voltage between ACM pin connector pins 11, 12, 14, 15 and 18 (battery voltage) and ground. 6 All information subject to change without notice. Copyright 2012 DETROIT DIESEL CORPORATION

5 a. If the voltage is less than 11.5 volts, restore voltage to ACM pin connector pins 11, 12, 14, 15 and 18. b. If voltage is greater than 11.5, restore ground connection to ACM pin connector pins 3, 5, 6 and 9. All information subject to change without notice. 7