Chrysler Pacifica. Manual — part 101
TEST
ACTION
APPLICABILITY
8
Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII
t from the DLC.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the SCI Transmit (PCM) circuit from the Data Link
harness connector (cav 7) to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 9
No
→ Repair the SCI Transmit (PCM) circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
9
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
401
COMMUNICATION
*NO RESPONSE FROM PCM (PCM SCI ONLY) —
Continued
Symptom:
*NO RESPONSE FROM POWER LIFTGATE MODULE
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE BCM
FUSED B(+) CIRCUIT OPEN
GROUND CIRCUIT OPEN
LIFTGATE OPTICAL SENSOR SHORT TO GROUND
LIFTGATE OPTICAL SENSOR SUPPLY SHORT TO GROUND
BODY CONTROL MODULE - LIFTGATE WAKE UP GROUND OPEN
LIFTGATE MODULE WAKE UP SIGNAL WIRE OPEN
LIFTGATE MODULE WAKE UP SIGNAL WIRE SHORT TO VOLTAGE
PCI BUS CIRCUIT OPEN
POWER LIFTGATE MODULE - OPEN
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?
All
Yes
→ Go To 2
No
→ Refer to the symptom list for problems related to no communica-
tion with the BCM.
Perform BODY VERIFICATION TEST - VER 1.
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?
All
Yes
→ Go To 3
No
→ Repair the Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
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?
All
Yes
→ Go To 4
No
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
402
COMMUNICATION
TEST
ACTION
APPLICABILITY
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
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. 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 5
No
→ Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
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?
All
No
→ Go To 6
Yes
→ Repair the Liftgate Hall Effect Supply circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
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?
All
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.
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?
All
Yes
→ Go To 8
No
→ Go To 9
403
COMMUNICATION
*NO RESPONSE FROM POWER LIFTGATE MODULE —
Continued
TEST
ACTION
APPLICABILITY
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?
All
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.
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?
All
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.
404
COMMUNICATION
*NO RESPONSE FROM POWER LIFTGATE MODULE —
Continued
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