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Home >> Chrysler >> 2005 >> Pacifica Limited >> Repair and Diagnosis >> Accessories & Equipment >> Seats >> Body Diagnostic Procedures - Diagnostic Information And Procedures - Chime, Communication, Door Ajar, Electrically Heated Systems, Exterior Lighting >> Communication >> Symptom: *NO RESPONSE FROM POWER LIFTGATE MODULE >> Diagnostic Procedure

Diagnostic Procedure

NO RESPONSE FROM POWER LIFTGATE MODULE SYMPTOM CHART

TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIII, enter Body then Body Computer.
NOTE: If communications can be established, check for any liftgate wake up circuit related. DTCs. If any are set, perform those related DTCs before proceeding.

Was the DRBIII able to I/D or communicate with the BCM?
Yes --> Go To 2.
No --> Refer to the appropriate test for problems related to no communication with the BCM.
Perform BODY VERIFICATION TEST - VER 1 .		 All
2 Turn the ignition off.
Remove the liftgate trim panel to gain access to the Power Liftgate Module but do not disconnect.
While back probing, measure the voltage of the Fused B(+) circuit.
Is the voltage above 11.0 volts?
Yes --> Go To 3.
No --> Repair the Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1 .		 All
3 Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit.
Does the test light illuminate brightly?
Yes --> Go To 4.
No --> Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1 .		 All
4
NOTE: Ensure there is PCI Bus communication with other modules on the vehicle before proceeding. If not, refer to the appropriate test 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 5No --> Repair the PCI Bus circuit for an open.Perform BODY VERIFICATION TEST - VER 1 .		 All
5 Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance between Ground and the Optical Sensor Supply circuit.
Is the resistance below 1000.0 ohms?
No --> Go To 6
Yes --> Repair the Liftgate Hall Effect Supply circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1 .		 All
6 Turn the ignition off.
Disconnect the Power Liftgate Module C2 harness connector.
Measure the resistance between the Ground and the Optical Sensor Supply circuit in the C2 connector.
Is the resistance below 1000.0 ohms?
No --> Go To 7
Yes --> Disconnect the Power Liftgate Motor connector and re-measure the resistance for a shorted harness from the Liftgate Optical Sensor Supply circuit to the Ground circuit in the connector. If the harness is okay, replace the Power Liftgate Drive Unit.
Perform BODY VERIFICATION TEST - VER 1 .		 All
7 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?
Yes --> Go To 8
No --> Go To 9		 All
8 Turn the ignition off.
Disconnect the Body Control Module C3 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?
Yes --> Repair the Liftgate Module Wake Up Signal wire for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Replace the Power Liftgate Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1 .		 All
9 Turn the ignition off.
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 --> Replace the Body Control Module in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1 .
No --> Repair the Liftgate Module Wake Up Signal wire for an open.
Perform BODY VERIFICATION TEST - VER 1 .		 All
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