No Response From PLGM (Power Liftgate Module)

*NO RESPONSE FROM POWER LIFTGATE MODULE (PLGM)





For a complete wiring diagram Consult Diagrams/Electrical.





Diagnostic Test

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.

NOTE: If the BCM is not functioning there will be no response from any CAN B or CAN C modules. Perform the No Response from BCM diagnostic procedure before continuing with individual module diagnostics. No Response From BCM (Body Control Module)

Turn the ignition on.

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10.0 and 16.0 volts.

With the scan tool, select ECU View.

NOTE: If the BCM is not configured properly individual modules may not show up on the scan tool diagnostic screens. If an individual module known to be on the vehicle does not show up on the scan tool, check BCM configuration before continuing with the diagnostic procedures.

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.

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. (Z125) GROUND CIRCUIT OPEN




Disconnect the Power Liftgate Module C3 harness connector.
Using a 12-volt test light connected to 12-volts, check the (Z125) ground circuit.
Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the (Z125) ground circuit for an open.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

3. (A115) FUSED B+ CIRCUIT OPEN OR SHORTED




Using a 12-volt test light connected to ground, check the (A115) Fused B+ circuit.
Does the test light illuminate brightly?

Yes

- Go To 4

No

- Repair the (A115) Fused B+ circuit for an open or short.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

4. (D55) AND (D54) CAN B BUS CIRCUITS OPEN




NOTE: One open circuit will not cause this condition.

Disconnect the Power Liftgate Module C2 harness connector.
Measure the voltage between the (D54) CAN B Bus (-) circuit and ground.
Measure the voltage between the (D55) CAN B Bus (+) circuit and ground.
Is there any voltage present on either circuit?

Yes

- Replace the Power Liftgate Module.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.

No

- Repair the (D55) and (D54) CAN B Bus circuits for an open. Inspect the connector for damage.
- Perform the BODY VERIFICATION TEST - VER 1. Body Verification Test.