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*NO RESPONSE FROM POWER LIFTGATE MODULE —
TEST
4
Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the Power Liftgate Module C2 harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the Power Liftgate Module C2 connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
Yes → Go To 5
→ Repair the PCI Bus circuit for an open.
No
5
Disconnect the BCM C3 harness connector.
Measure the voltage between the Liftgate Module Wake Up Signal circuit and
ground.
Is the voltage above 10.0 volts?
Yes → Replace the Body Control Module in accordance with the service
→ Go To 6
No
6
Disconnect the Body Control Module C3 harness connector.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance of the Liftgate Module Wake Up Signal circuit between the
BCM C3 connector and the Power Liftgate Module C2 connector.
Is the resistance below 5.0 ohms?
Yes → Go To 7
→ Repair the Liftgate Module Wake Up Signal circuit for an open.
No
7
Disconnect the Body Control Module C3 harness connector.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance between the Liftgate Module Wake Up Signal circuit and
ground.
Is the resistance below 100.0 ohms?
Yes → Repair the Liftgate Module Wake Up Signal circuit for a short to
→ Go To 8
No
ACTION
Perform BODY VERIFICATION TEST - VER 1.
information.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
ground.
Perform BODY VERIFICATION TEST - VER 1.
361
COMMUNICATION
Continued
APPLICABILITY
All
All
All
All
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