NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (DIESEL)
NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (DIESEL)
 |
For a complete wiring diagram, refer to the Wiring Information.
Possible Causes |
|---|
| POWERTRAIN CONTROL MODULE POWER AND GROUND CIRCUITS |
| (D65) CAN C BUS (+) CIRCUIT OPEN |
| (D64) CAN C BUS (-) CIRCUIT OPEN |
| POWERTRAIN CONTROL MODULE (PCM) |
1. TEST FOR INTERMITTENT CONDITION
| NOTE: | Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing. |
| 1. | Turn the ignition on. |
| NOTE: | Make sure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts. |
| 2. | With the scan tool, read the module status. |
| NOTE: | Check the TIPM for any active CAN hardware DTCs, perform DTC before proceeding. |
Does the scan tool indicate that the module is active on the bus?
Yes
- The no response condition is not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
No
- Go To 2
| 1. | Check the PCM power and ground circuits. (Refer to 29 - Non-DTC Diagnostics/Drivability - Diesel - Diagnosis and Testing) and perform the Checking the PCM Power and Ground Circuits diagnostic procedure. |
Were any problems found?
Yes
- Repair as necessary.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Go To 3
3. CHECK THE (D65) CAN C BUS (+) CIRCUIT FOR AN OPEN
 |
| 1. | Turn the ignition off. |
| 2. | Disconnect the TIPM C1 harness connector. |
| 3. | Disconnect the PCM C2 harness connector. |
| 4. | Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the PCM C2 harness connector. |
Is resistance below 5.0 Ohms?
Yes
- Go To 4
No
- Repair the open in the (D65) CAN C Bus (+) circuit.
-
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard Procedure).
4. CHECK THE (D64) CAN C BUS (-) CIRCUIT FOR AN OPEN
 |
| 1. | Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the PCM C2 harness connector. |
Is resistance below 5.0 Ohms?
Yes
- Replace and program the Powertrain Control Module in accordance with the Service Information.
- Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure).
No
- Repair the open in the (D64) CAN C Bus (-) circuit.
-
Perform the PCM VERIFICATION TEST. (Refer to 28 - DTC-Based Diagnostics/MODULE, Powertrain Control (PCM)
- Standard Procedure).