Totally Integrated Power Module (TIPM)

U0164-LOST COMMUNICATION WITH HVAC CONTROL MODULE

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

- When Monitored:
With the ignition on.

Battery voltage between 10 and 16 volts.

Ignition Off Draw (IOD) fused installed.

Totally Integrated Power Module (TIPM) is configured correctly.

- Set Condition:
Bus messages not received from the A/C Heater Control (HVAC) for approximately two to five seconds.





Diagnostic Test

1. VERIFY 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 and perform the Stored Lost Communication DTCs diagnostic procedure.

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

NOTE: Check for TIPM configuration, CAN B 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 THE HVAC IS ACTIVE ON THE BUS
1. Turn the ignition on.
2. With the scan tool, view all the modules.
3. Verify the HVAC is active on the bus.

Is the HVAC active on the bus?

Yes
- Go To 4

No
- No Response From HVAC (A/C Heater Control Module) and perform the No Response from HVAC diagnostic procedure.

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS
1. With the scan tool, view all the modules.

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

Yes
- Replace/update the A/C Heater Control.
- Perform the HVAC VERIFICATION TEST. HVAC Verification Test.

No
- Replace/update the module that set the DTC.
- Perform the appropriate verification test.