Chrysler Pacifica. Manual — part 190
Symptom:
PCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
PCM MESSAGES NOT RECEIVED
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the OHC does not receive PCI bus messages from the
PCM for 5 seconds.
POSSIBLE CAUSES
COMMUNICATION DTC PRESENT
OVERHEAD CONSOLE
TEST
ACTION
APPLICABILITY
1
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
→ With the DRBIIIt, erase DTCs. Turn the ignition off, wait 10
seconds, then turn the ignition on. With the DRBIII
t, read DTCs.
If this code resets, replace the Overhead Console in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to COMMUNICATION for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
757
OVERHEAD CONSOLE
Symptom:
TCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
TCM MESSAGES NOT RECEIVED
When Monitored:
With the ignition on.
Set Condition:
This DTC will set if the OHC does not receive PCI bus messages from the
TCM for 5 seconds. The OHC receives Reverse message from the TCM to provide the
Back-Up Lamp Signal to the EC Mirror.
POSSIBLE CAUSES
PARK/NEUTRAL SWITCH FAULT OR TCM DTC PRESENT
OVERHEAD CONSOLE
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure the TCM communicates on the PCI bus.
NOTE: Diagnose and repair any TCM DTCs before proceeding with this test.
Turn the ignition on, engine not running.
With the DRBIII
t, monitor the Park/Neutral Position Switch input state.
Move the gear selector through all gear positions.
Does the DRBIII
t display Park/Neutral and Drive/Reverse in the correct gear
positions?
All
Yes
→ With the DRBIIIt, erase DTCs. Turn the ignition off, wait 10
seconds, then turn the ignition on. With the DRBIII
t, read DTCs.
If this code resets, replace the Overhead Console in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to symptom 9*CHECKING PARK/NUETRAL SWITCH OP-
ERATION in the TRANSMISSION - NGC category.
Perform BODY VERIFICATION TEST - VER 1.
758
OVERHEAD CONSOLE
Symptom List:
TEMP SENSOR CIRCUIT OPEN
TEMP SENSOR CIRCUIT SHORT
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be TEMP SENSOR CIRCUIT OPEN.
When Monitored and Set Condition:
TEMP SENSOR CIRCUIT OPEN
When Monitored:
With the ignition on.
Set Condition:
The OHC receives a PCI bus message from the PCM indicating an
ambient temperature sensor fault. The outside temperature will display -40.
TEMP SENSOR CIRCUIT SHORT
When Monitored:
With the ignition on.
Set Condition:
The OHC receives a PCI bus message from the PCM indicating an
ambient temperature sensor fault. The outside temperature will display 130.
POSSIBLE CAUSES
PCM DTC PRESENT
TEST
ACTION
APPLICABILITY
1
NOTE: The ambient temperature sensor is hardwired to the PCM. This code
sets in response to a PCI bus message from the PCM.
When this code is set, view repair.
All
Repair
Refer to DRIVEABILITY for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
759
OVERHEAD CONSOLE
Symptom:
DISPLAY VOLTAGE SUPPLY SHORT TO GROUND
When Monitored and Set Condition:
DISPLAY VOLTAGE SUPPLY SHORT TO GROUND
When Monitored:
With the ignition on.
Set Condition:
A Park Assist Display Supply circuit short to ground is detected.
POSSIBLE CAUSES
INTERMITTENT CONDITION
DISPLAY SUPPLY CIRCUIT SHORT TO GROUND
PARK ASSIST MODULE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, Erase DTCs.
Cycle the ignition off for at least 1 minute.
Turn the ignition on.
With the DRBIII
t under System Tests, perform the Self Test.
With the DRBIII
t read DTCs.
Does this DTC reset?
All
Yes
→ Go To 2
No
→ Go To 4
2
Turn the ignition off.
Disconnect the Park Assist Module harness connector.
Disconnect the Park Assist Display harness connector.
Measure the resistance between ground and the Park Assist Display Supply circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Park Assist Display Supply circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Replace the Park Assist Display in accordance with the Service Information.
Turn the ignition on.
With the DRBIII
t under System Tests, perform the Self Test.
With the DRBIII
t, Erase DTCs.
With the DRBIII
t read DTCs.
Does this DTC reset?
All
Yes
→ Replace the Park Assist Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
760
PARK ASSIST SYSTEM
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