Powertrain Control Module (PCM)

U0293- LOST COMMUNICATION WITH HYBRID CONTROL MODULE - HEV





For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams.

- When Monitored:
Ignition run time is greater than one second. Battery voltage between 9 and 16 Volts. Engine run time greater than 10 seconds.

- Set Condition:
The Powertrain Control Module (PCM) Lost Communication with HCP through HGM Gateway. The circuit is continuously monitored. One trip fault.





WARNING: On vehicles equipped with the high voltage system, you must thoroughly read and follow all High Voltage Safety procedures. In addition, before performing any diagnostic or service procedure near a high voltage component, you must perform the High Voltage Power Down. Failure to follow these instructions may result in possible serious or fatal injury

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Pre-Diagnostic Troubleshooting Procedure.

1. VERIFY THE DIAGNOSTIC TROUBLE CODE (DTC) IS ACTIVE

NOTE: Make sure the IOD fuse is installed and battery voltage is between 10 and 16 Volts before proceeding.

1. With the scan tool, read active DTCs.

Is this DTC active?

Yes

- Go To 2

No

- Stored Lost Communication DTCs Perform the Stored Lost Communication diagnostic procedure.

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS
1. With the scan tool, read all active DTCs from all modules.

NOTE: Check for HCP configuration, CAN B, D or C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs to the conditions listed above?

Yes

- Perform the appropriate diagnostic procedure.

No

- Go To 3

3. VERIFY THAT THE HCP IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, select Network Diagnostics.
3. Verify that the HCP is active on the bus.

Is the HCP active on the bus?

Yes

- Go To 4

No

- Perform the No Response HCP diagnostic procedure.

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. With the scan tool, select Network Diagnostics.

Is there more than one module with active DTCs "Logged Against" the HCP?

Yes

- Replace/update the Hybrid Control Processor (HCP).
- Perform the BODY VERIFICATION TEST. Body Verification Test.

No

- Replace/update the Powertrain Control Module
- Perform the POWERTRAIN VERIFICATION TEST. Powertrain Verification Test.