No Response From TCM (Powertrain Control Module) - NGC

NO RESPONSE FROM TCM (POWERTRAIN CONTROL MODULE) - NGC

Special Tools:










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






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

2. CHECK FOR LOSS OF COMMUNICATION WITH PCM
1. With the scan tool, read the active DTCs.

Does the scan tool display U0100-LOST COMMUNICATION WITH ECM/PCM?

Yes

- and perform the NO RESPONSE FROM PCM diagnostic procedure No Response From PCM (Powertrain Control Module) - NGC.

No

- Go To 3

3. CHECK THE (Z903) GROUND CIRCUITS FOR AN OPEN




1. Turn the ignition off.
2. Disconnect the PCM C4 harness connector.

CAUTION: Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the PCM Pinout Box to perform diagnosis.

3. Using a 12-volt test light connected to 12-volts, check the (Z903) Ground circuits.

Does the test light illuminate brightly for each circuit?

Yes

- Replace the Powertrain Control Module. Powertrain Control Module - Removal.
- Perform the appropriate TRANSMISSION VERIFICATION TEST. Verification Tests.

No

- Repair the open in the (Z903) Ground circuit.
- Perform the appropriate TRANSMISSION VERIFICATION TEST. Verification Tests.