Chrysler Pacifica. Manual — part 90
Symptom List:
PCI BUS SHORTED TO BATTERY
PCI BUS SHORTED TO GROUND
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be PCI BUS SHORTED TO BAT-
TERY.
When Monitored and Set Condition:
PCI BUS SHORTED TO BATTERY
When Monitored:
Continuously.
Set Condition:
Anytime the module detects a short to battery on the PCI Bus circuit. DTC
will mature immediately.
PCI BUS SHORTED TO GROUND
When Monitored:
Continuously.
Set Condition:
Anytime the module detects a short to ground on the PCI Bus circuit. DTC
will mature immediately.
POSSIBLE CAUSES
INTERMITTENT CONDITION
TEST
ACTION
APPLICABILITY
1
NOTE: For this code to be active, the DRB will not be able to communicate
with any modules on the vehicle (except the PCM).
NOTE: Clear the code. If this code continues to set and the DRB can still
communicate with the module, it will be necessary to replace the module.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, wiggle the wiring
harnesses. This is to try and duplicate the complete bus failure condition.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
357
COMMUNICATION
Symptom:
PCI INTERNAL FAULT
When Monitored and Set Condition:
PCI INTERNAL FAULT
When Monitored:
Continuously.
Set Condition:
The same PCI Bus message can not be transmitted within 90ms. DTC will
mature immediately.
POSSIBLE CAUSES
PCI INTERNAL FAULT
TEST
ACTION
APPLICABILITY
1
Connect the DRB to the Data Link Connector.
Turn the ignition on.
With the DRB, erase DTC’s.
Turn the ignition off then turn the ignition on.
With the DRB, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the module which set the DTC in accordance with the
service information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
358
COMMUNICATION
Symptom:
PCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
PCM MESSAGES NOT RECEIVED
When Monitored:
With the ignition in run.
Set Condition:
The module does not receive any messages from the PCM. Time to mature
for the BCM, DDM and PDM is 5 seconds. Time to mature for the IPM is 2 seconds.
POSSIBLE CAUSES
PCM MESSAGES NOT RECEIVED
ATTEMPT TO COMMUNICATE WITH THE PCM
PCI BUS CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, enter Instrument Cluster, System Tests then PCM Monitor.
Does the DRBIII
t display: PCM is active on BUS?
All
Yes
→ Erase the DTC, if DTC resets, replace the module which set the
DTC in accordance with the service information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the PCM.
Was the DRBIII
t able to communicate with the PCM?
All
Yes
→ Go To 3
No
→ Refer to the communication category and perform the appropriate
symptom.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the PCM harness connector.
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 PCI Bus circuit between the DLC and the PCM
connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace and program the Powertrain Control Module in accor-
dance 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.
359
COMMUNICATION
Symptom:
PDM MESSAGE RESPONSE FAULT
When Monitored and Set Condition:
PDM MESSAGE RESPONSE FAULT
When Monitored:
Continuously.
Set Condition:
The door module does not receive a memory message from the passenger
door module. Time to mature for the DDM is 10 seconds.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE PASSENGER DOOR MODULE
CLEAR DTC
PASSENGER DOOR MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, attempt to communicate with the passenger door module.
Was the DRB able to I/D or communicate with the passenger door module?
All
Yes
→ Go To 2
No
→ Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2
With the DRB, erase DTC’s.
Cycle the ignition switch from off to on.
Reset the memory positions.
Operate the memory system.
With the DRB, read DTC’s.
Did this DTC reset?
All
Yes
→ Replace the Passenger Door Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ No problem found at this time. Refer to the wiring diagrams
located in the service information for any possible intermittent
wiring problems.
Perform BODY VERIFICATION TEST - VER 1.
360
COMMUNICATION
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