TEST
ACTION
APPLICABILITY
3
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
t 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. Set Probe to x10.
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?
All
Yes
→ Go To 4
No
→ Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Turn the ignition on.
Measure the resistance between ground and the Liftgate Module Wake Up Signal
circuit.
Is the resistance below 50.0 ohms?
All
Yes
→ Go To 5
No
→ Go To 8
5
Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Disconnect the Power Liftgate Module C2 harness connector.
Turn the ignition on.
Measure the voltage of the Liftgate Module Wake Up Signal circuit.
Is there any voltage present?
All
Yes
→ Repair the Liftgate Module Wake Up Signal wire for a short to
voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 6
400
COMMUNICATION
*NO RESPONSE FROM POWER LIFTGATE MODULE —
Continued