No Response From PCM (Powertrain Control Module)
NO RESPONSE FROM PCM (POWERTRAIN CONTROL MODULE) (NGC)
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. Using the scan tool, select ECU View.
NOTE: A red "X" will be next to the module that is not communicating, indicating that the module is not active on the Bus network. A green check indicates that the module is active on the Bus network.
NOTE: Check the TIPM for any active CAN C hardware DTCs, perform DTC before proceeding.
Does the scan tool display a red "X" next to the module?
Yes
- Go To 2
No
- The no response condition is not present at this time. Using the wiring diagram/schematic as a guide, inspect the wiring for chafed, pierced, pinched, and partially broken wires and the wiring harness connectors for broken, bent, pushed out, and corroded terminals.
2. (A209) FUSED B(+) CIRCUITS OPEN OR SHORTED
1. Turn the ignition off.
2. Disconnect the PCM C1 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 PCM Pinout Box 8815 to perform diagnosis.
3. Using a 12-volt test light connected to ground, check the (A209) Fused B(+) circuit.
Does the test light illuminate brightly?
Yes
- Go To 3
No
- Repair the (A209) Fused B(+) circuit for an open or short.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
3. (Z902) GROUND CIRCUITS OPEN
1. Using a 12-volt test light connected to 12-volts, check each (Z902) ground circuits.
Does the test light illuminate brightly for each circuit?
Yes
- Go To 4
No
- Repair the (Z902) ground circuit for an open.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
4. (F202) FUSED IGNITION SWITCH OUTPUT (RUN/START) CIRCUIT OPEN OR SHORTED
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F202) Fused Ignition Switch Output (Run/Start) circuit.
Does the test light illuminate brightly?
Yes
- Go To 5
No
- Repair the (F202) Fused Ignition Switch Output (Run/Start) circuit for an open or short.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
5. (F1) FUSED IGNITION SWITCH OUTPUT (OFF/RUN/START) CIRCUIT OPEN OR SHORTED
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F1) Fused Ignition Switch Output (Off/Run/Start) circuit.
Does the test light illuminate brightly?
Yes
- Go To 6
No
- Repair the (F1) Fused Ignition Switch Output (Off/Run/Start) circuit for an open or short.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
6. (F342) FUSED ASD RELAY OUTPUT CIRCUIT OPEN OR SHORTED
1. Turn the ignition on.
2. Using a 12-volt test light connected to ground, check the (F342) Fused ASD Relay Output circuit.
Does the test light illuminate brightly?
Yes
- Go To 7
No
- Repair the (F342) Fused ASD Relay Output circuit for an open or short.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
7. (D65) CAN C BUS (+) CIRCUIT OPEN
1. Turn the ignition off.
2. Disconnect the TIPM C1 harness connector.
3. Measure the resistance of the (D65) CAN C Bus (+) circuit between the TIPM C1 harness connector and the PCM C1 connector.
Is resistance below 5.0 Ohms?
Yes
- Go To 8
No
- Repair the (D65) CAN C Bus (+) circuit for an open.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
8. (D64) CAN C BUS (-) CIRCUIT OPEN
1. Measure the resistance of the (D64) CAN C Bus (-) circuit between the TIPM C1 harness connector and the PCM C1 connector.
Is resistance below 5.0 Ohms?
Yes
- Replace the Powertrain Control Module.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.
No
- Repair the (D64) CAN C Bus (-) circuit for an open.
- Perform the POWERTRAIN VERIFICATION TEST. PCM Verification Test.