Chrysler Pacifica. Manual — part 188
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure there is communication with the Body Control Module,
Instrument Cluster and other modules before proceeding.
NOTE: For this code to be active, the DRBIII
t will not be able to communi-
cate with any modules on the vehicle, except the PCM.
With the DRBIII
t, erase DTCs.
Cycle the ignition switch from on to off and then back to on..
With the DRBIII
t, read DTCs.
Does the DRBIII
t display PCI BUS SHORTED TO GROUND?
All
No
→ The condition is not present at this time. Monitor DRBIIIt
parameters while wiggling the related wire harness. Refer to any
Technical Service bulletins (TSB) that may apply. Visually inspect
the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
Yes
→ Replace the Navigation Unit in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
749
NAVIGATION
NO PCI BUS TRANSMISSION —
Continued
Symptom:
PCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
PCM MESSAGES NOT RECEIVED
When Monitored:
When the Navigation Unit is powered up.
Set Condition:
If the Vehicle Speed message is not received, the NAV system will have the
vehicle icon remain stationary. If no vehicle speed message is received for 2 seconds and the
vehicle is in Drive, full programming will be disabled.
POSSIBLE CAUSES
DTC INTERMITTENT CONDITION
PCM DTC PRESENT
NAVIGATION UNIT
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, erase DTCs.
Cycle the ignition switch from on to off and then back to on..
Turn the Navigation System on and try to select a location.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display PCM MESSAGES NOT RECEIVED?
All
No
→ The condition is not present at this time. Monitor DRBIIIt
parameters while wiggling the related wire harness. Refer to any
Technical Service bulletins (TSB) that may apply. Visually inspect
the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
Yes
→ Go To 2
2
NOTE: Diagnose and repair any PCM DTCs present before proceeding with
this test.
Turn the ignition on.
With the DRBIII
t monitor the Vehicle Speed while moving the vehicle.
Does the DRBIII
t display Vehicle Speed correctly?
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 Navigation Unit in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to DRIVEABILITY for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
750
NAVIGATION
Symptom:
TCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
TCM MESSAGES NOT RECEIVED
When Monitored:
At all times.
Set Condition:
If no PCI Reverse message is received for 5 consecutive messages, the NAV
system will assume forward motion and be reflected with movement of the vehicle icon.
POSSIBLE CAUSES
DTC INTERMITTENT CONDITION
PARK/NEUTRAL SWITCH FAULT OR TCM DTC PRESENT
NAVIGATION UNIT
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, erase DTCs.
Cycle the ignition switch from on to off and then back to on..
Turn the Navigation System on and try to select a location.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display TCM MESSAGES NOT RECEIVED?
All
No
→ The condition is not present at this time. Monitor DRBIIIt
parameters while wiggling the related wire harness. Refer to any
Technical Service bulletins (TSB) that may apply. Visually inspect
the related wiring harness and connector terminals.
Perform BODY VERIFICATION TEST - VER 1.
Yes
→ Go To 2
2
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
→ Replace the Navigation Unit in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to symptom 9*CHECKING PARK/NEUTRAL SWITCH OP-
ERATION in the TRANSMISSION - NGC category.
Perform BODY VERIFICATION TEST - VER 1.
751
NAVIGATION
Symptom:
BCM MESSAGES NOT RECEIVED
When Monitored and Set Condition:
BCM 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
BCM for 5 seconds. The OHC receives raw fuel and distance data from the BCM to compute
the fuel and distance values displayed by the EVIC.
POSSIBLE CAUSES
COMM FAULT PRESENT
OVERHEAD CONSOLE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, attempt to communicate with the BCM.
Was the DRBIII
t able to communicate with the BCM?
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.
752
OVERHEAD CONSOLE
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