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SUBJECT DATESPN 625/FMI 9 (CPC) (EPA07) November 2013

Additions, Revisions, or Updates

Publication Number / Title Platform Section Title Change

DDC-SVC-MAN-0084 DD Platform SPN 625/FMI 9 (CPC)(EPA07) NEW diagnostics for CPC.

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All information subject to change without notice. 311 20-13Copyright 2013 DETROIT DIESEL CORPORATION

2 SPN 625/FMI 9 - EPA07This diagnostic is typically ECAN ID_1629 Diagnostic Message Not Received.

Check as follows:

Table 1.SPN 625/FMI 9

Description ECAN ID_1629 Diagnostic Message Not Received.Monitored Parameter CAN CommunicationTypical Enabling Conditions Always EnabledMonitor Sequence NoneExecution Frequency Always EnabledTypical Duration 2 SecondsDash Lamps NoneEngine Reaction NoneVerification Ignition On Cycle

NOTE: This fault code may be caused by erratic data or the Controller Area Network (CAN) propriety data linkhas failed between the Motor Control Module (MCM) and the Common Powertrain Controller (CPC).

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.

2. Has the Motor Control Module (MCM) or Common Powertrain Controller (CPC) been recently programmed?

2 SPN 625/FMI 9 - EPA07

4 All information subject to change without notice.Copyright 2013 DETROIT DIESEL CORPORATION11 20-13

a. Yes; clear the fault codes. If faults do not become active, release the vehicle. If faults become active, Go to step3.

b. No; Go to step 3.NOTE: MCM and CPC communicate on the same CAN line. If water penetrates any connector, it can short theCAN line and prevent communications.

3. Turn ignition OFF.4. Disconnect the CPC electrical harness connector #4.5. Inspect the CPC connector for corroded, unseated (pushed out) or damaged pins, bent or spread pins; inspect the

connector seal for damage (signs of water or oil intrusion).a. If contamination is found, repair as necessary. Go to step 14.b. If no contamination is found, Go to step 6.

6. Check CPC internal terminating resistor by measuring and recording the resistance across pins 1 and 3 of the CPCelectrical connector cavity #4.

a. If the resistance is 110 to 130 ohms, Go to step 7.b. If the resistance is not between 110 to 130 ohms, replace the CPC. Go to step 14.

7. Measure the resistance between pins 1 and 3 of the CPC harness connector #4.a. If the resistance is greater than 10K ohms, Go to step 8.b. If the resistance is less than 10K ohms, repair the shorted harness wires between pin 1 and pin 3 of the CPC

connector #4. Refer to Original Equipment Manufacturer (OEM) literature for schematic information. Go to step14.

8. Disconnect MCM 21-pin connector.9. Inspect the Motor Control Module (MCM) 21-pin connector for corroded, unseated (pushed out) or damaged pins, bent

or spread pins; inspect the connector seal for damage (signs of water or oil intrusion).a. If contamination is found, repair as necessary. Go to step 14.b. If no contamination is found, Go to step 10.

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All information subject to change without notice. 511 20-13Copyright 2013 DETROIT DIESEL CORPORATION

10. Measure the resistance between pin 19 of the MCM 21-pin harness connector and battery ground.a. If the resistance is greater than 10K ohms, Go to step 11.b. If the resistance is less than 10K ohms, repair the wire short to ground between pin 19 of the MCM 21-pin

connector. Refer to Original Equipment Manufacturer (OEM) literature for schematic information. Go to step 14.11. Measure the resistance between pin 13 of the MCM 21-pin harness connector and battery ground.

a. If the resistance is greater than 10K ohms, Go to step 12.b. If the resistance is less than 10K ohms , repair the wire short to ground between pin 13 of the MCM 21-pin

connector. Refer to Original Equipment Manufacturer (OEM) literature for schematic information. Go to step 14.12. Measure the resistance between pin 1 of the CPC harness connector #4 and pin 19 of the MCM 21-pin harness

connector.a. If the resistance is less than 5 ohms, Go to step 13.b. If the resistance is greater than 5 ohms, repair the wire between pin 1 of the CPC harness connector #4 and pin 19

of the MCM 21-pin harness connector. Refer to Original Equipment Manufacturer (OEM) literature forschematic information. Go to step 14.

13. Measure the resistance between pin 3 of the CPC harness connector #4 and pin 13 of the MCM 21-pin harnessconnector.

a. If the resistance is less than 5 ohms, Go to step 14.b. If the resistance is greater than 5 ohms, repair the wire between pin 3 of the CPC harness connector #4 and pin 13

of the MCM 21-pin harness connector. Refer to Original Equipment Manufacturer (OEM) literature forschematic information. Go to step 14.

14. Restore all connections. Cycle ignition. Clear fault codes. Does SPN 625/FMI 9 fault code become active?a. Yes; replace the CPC. Refer to OEM literature for Removal of the Common Powertrain Controller. Verify

repairs.b. No; release the vehicle.

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6 All information subject to change without notice.Copyright 2013 DETROIT DIESEL CORPORATION11 20-13

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