Dodge Ram Truck 1500-2500-3500. Manual — part 1109

P0629-HIGH VOLTAGE DETECTED AT THE FUEL LIFT PUMP (CONTINUED)

6.

ECM

Reconnect the ECM connectors.

Turn the ignition on, engine off.

Connect one end of an incandescent test light to battery negative.

Connect the other end of the test light to the relay driver pin in the PDC.

Using the scan tool, actuate the lift pump.

Does the test light illuminate brightly?

Yes

>> Repair complete.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Replace the ECM.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

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ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0630-VIN NOT ENTERED ERROR

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
While the key is on.

•

Set Condition:
The VIN was not calibrated into the ECM.

Possible Causes

VIN NOT CALIBRATED INTO ECM

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

1.

VIN NOT CALIBRATED INTO ECM

Using the scan tool, recalibrate the ECM with the proper VIN.

Did the DTC P0630 reset?

Yes

>> Replace the ECM.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Test Complete.

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

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P0633-SKIM SECRET KEY NOT ENTERED

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
While the key is on.

•

Set Condition:
The SKIM secret key was not calibrated into the ECM.

Possible Causes

IMPROPER IGNITION KEY IS BEING USED

SKIM DTC’S

SKIM NOT CALIBRATED PROPERLY

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

1.

SKIM DTC’S

With the scan tool, read SKIM DTCs.

Are any SKIM DTC’s present?

Yes

>> Repair all SKIM DTC’s first.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

No

>> Go To 2

2.

IMPROPER IGNITION KEY IS BEING USED

Verify that the proper ignition key is in the ignition lock on the steering column.

Are the proper keys being used?

Yes

>> Go To 3

No

>> Use the proper key for the vehicle.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

3.

SKIM NOT CALIBRATED PROPERLY

Using the scan tool, recalibrate the ECM with the proper SKIM secret key.

With the scan tool, erase DTCs.

Cycle the ignition switch from on to off to on.

With the scan tool, read DTCs.

Did the DTC reset?

No

>> Test Complete.

Yes

>> Verify information is correct and replace ECM.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

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ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0642-LOW VOLTAGE AT THE #2 SENSOR SUPPLY CIRCUIT

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

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