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Home >> Chrysler >> 2004 >> Pacifica AWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Body Diagnostic Procedures - 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 - DIAGNOSTIC PROCEDURE

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?
  1. Yes: Go To 2
  2. No: SYMPTOM LIST for problems related to no communication with the BCM.

    Perform BODY VERIFICATION TEST VER-1 .

 All
2 Turn the ignition off.
Disconnect the Power Liftgate Module C1 harness connector.
Measure the voltage of the Fused B(+) circuit.
Is the voltage above 10.0 volts?
  1. Yes: Go To 3
  2. 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?
  1. Yes: Go To 4
  2. 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, 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 DRBIII® Lab Scope.Does the voltage pulse from 0 to approximately 7.5 volts?
  1. Yes: Go To 5
  2. No: Repair the PCI Bus circuit for an open.

    Perform BODY VERIFICATION TEST VER-1 .

 All
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?
  1. Yes: Replace the Body Control Module in accordance with the service information.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 6
 All
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?
  1. Yes: Go To 7
  2. No: Repair the Liftgate Module Wake Up Signal circuit for an open.

    Perform BODY VERIFICATION TEST VER-1 .

 All
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?
  1. Yes: Repair the Liftgate Module Wake Up Signal circuit for a short to ground.

    Perform BODY VERIFICATION TEST VER-1 .

  2. No: Go To 8
 All
8 If there are no possible causes remaining, view repair.
  1. Repair: Replace the Power Liftgate Module in accordance with the service information.

    Perform BODY VERIFICATION TEST VER-1 .

 All
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