Chrysler RG Voyager. Manual — part 138
Symptom:
*NO RESPONSE FROM PARK ASSIST MODULE
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE BCM
GROUND CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
OPEN PCI BUS CIRCUIT
PARK ASSIST MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the BCM.
Was the DRBIII
t 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.
Disconnect the Park Assist Module harness connector.
Using a 12-volt test light connected to 12-volts, probe each ground circuit.
Is the test light illuminated for each circuit?
All
Yes
→ Go To 3
No
→ Repair the ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Park Assist Module harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output circuit.
Is the test light illuminated?
All
Yes
→ Go To 4
No
→ Repair the Fused Ignition Switch Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
521
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 Park Assist Module 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 Park Assist Module 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
→ Replace the Park Assist Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
522
COMMUNICATION
*NO RESPONSE FROM PARK ASSIST MODULE —
Continued
Symptom:
*NO RESPONSE FROM PCM (PCI BUS) - NGC
POSSIBLE CAUSES
PCM PCI NO RESPONSE
POWERTRAIN CONTROL MODULE
PCI BUS CIRCUIT OPEN
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: As soon as one or more module communicates with the DRB, answer
the question.
With the DRB, enter Body then Body Computer
With the DRB, enter Body then Electro/Mechanical Cluster (MIC).
With the DRB, enter Passive Restraints then Airbag.
Were you able to establish communications with any of the modules?
All
Yes
→ Go To 2
No
→ Refer to symptom PCI Bus Communication Failure in the Com-
munications category.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
2
With the DRB read the Powertrain DTC’s. This is to ensure power and grounds to the
PCM are operational.
NOTE: If the DRB will not read PCM DTC’s, follow the NO RESPONSE TO
PCM (PCM SCI only) symptom path.
Turn the ignition off.
Disconnect the PCM harness connectors.
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.
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 appropriate terminal of special tool #8815.
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
→ Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
No
→ Repair the PCI Bus circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
523
COMMUNICATION
Symptom:
*NO RESPONSE FROM PCM (PCM SCI ONLY) - NGC
POSSIBLE CAUSES
CHECK PCM POWERS AND GROUNDS
PCM SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE
PCM SCI RECEIVE CIRCUIT SHORTED TO VOLTAGE
PCM SCI CIRCUITS SHORTED TOGETHER
PCM SCI TRANSMIT CIRCUIT SHORTED TO GROUND
PCM SCI RECEIVE CIRCUIT SHORTED TO GROUND
PCM SCI RECEIVE CIRCUIT OPEN
PCM SCI TRANSMIT CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Perform the symptom Checking PCM Power and Ground Circuits in the Driveability
category.
NOTE: With the DRBIII
t in the generic scan tool mode, attempt to commu-
nicate with the PCM.
NOTE: If the DRBIII
t can communicate with the PCM in the generic scan
tool mode, it may not be necessary to perform this step.
Did the vehicle pass this test?
All
Yes
→ Go To 2
No
→ Repair as necessary.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
2
Turn the ignition off.
Disconnect the DRBIII
t from the DLC.
Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the PCM SCI Transmit circuit at the Data Link harness
connector (cav 7).
Is the voltage above 1.0 volt?
All
Yes
→ Repair the PCM SCI Transmit circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the DRBIII
t from the DLC.
Disconnect the PCM harness connectors.
Turn the ignition on.
Measure the voltage of the PCM SCI Receive circuit at the Data Link harness
connector (cav 12).
Is the voltage above 1.0 volt?
All
Yes
→ Repair the PCM SCI Receive circuit for a short to voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 1 - NGC.
No
→ Go To 4
524
COMMUNICATION
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