Chrysler Pacifica. Manual — part 40
Symptom:
NO OCM MESSAGE
When Monitored and Set Condition:
NO OCM MESSAGE
When Monitored:
At ignition on, the ACM monitors the PCI Bus for a PCI Bus message
from the Occupant Classification Module.
Set Condition:
The DTC will set if the ACM does not receive a valid OCM bus message,
if expected by vehicle configuration.
POSSIBLE CAUSES
ACTIVE LOSS OF IGN RUN-START DTC
OCM, COMMUNICATION FAILURE
ACM, NO OCCUPANT CLASSIFICATION MODULE MESSAGES
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
SELECT ACTIVE or STORED DTC:
All
ACM - ACTIVE DTC
ACM - STORED DTC
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
With the DRBIII
t, read the active ACM DTCs..
Is the Run-Start trouble code active?
All
Yes
→ Refer to symptom list for problems related to the Airbag Control
Module. Then perform the symptom LOSS OF IGNITION RUN-
START trouble code.
No
→ Go To 3
157
AIRBAG
TEST
ACTION
APPLICABILITY
3
Turn the ignition on.
With the DRBIII
t, ensure PCI Bus communications with the Occupant Classification
Module.
Is the Occupant Classification Module communicating on the PCI Bus?
All
Yes
→ Go To 4
No
→ Refer to symptom list and select the related symptom NO RE-
SPONSE FROM OCM or OCM BUS +/- SIGNAL OPEN.
Perform OCS VERIFICATION TEST - VER 1.
4
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND PERSONAL INJURY OR DEATH.
If there are no possible causes remaining, view repair.
All
Repair
Replace the Airbag Control Module in accordance with Service
Instructions.
Perform __AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
5
With the DRBIII
t, record and erase all DTC’s from all Airbag modules.
If equipped with Passenger Airbag On - Off switch, read the DTC’s in all switch
positions.
If any ACTIVE codes are present they must be resolved before diagnosing any stored
codes.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed
out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent
problem.
Reconnect any disconnected components and harness connector.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION ON, THEN RECONNECT THE BATTERY.
With the DRBIII
t monitor active codes as you work through the following steps.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
IF only stored codes return continue the test until the problem area has been isolated
In the previous steps you have attempted to recreate the conditions responsible for
setting active DTC in question.
Are any ACTIVE DTCs present?
All
Yes
→ Select appropriate symptom from Symptom List.
No
→ No problem found at this time. Erase all codes before returning
vehicle to customer.
158
AIRBAG
NO OCM MESSAGE —
Continued
Symptom:
NO ODOMETER MESSAGE
When Monitored and Set Condition:
NO ODOMETER MESSAGE
When Monitored:
With ignition on, the ACM monitors the PCI Bus for the Odometer
message from the Body Control Module. The PCM transmits the odometer message at 1
second intervals.
Set Condition:
The code will set, if the ACM does not see the odometer message for 10
seconds.
POSSIBLE CAUSES
PCM, PCI COMMUNICATION FAILURE
NO ODOMETER MESSAGE
STORED CODE OR INTERMITTENT CONDITION
ACM, NO ODOMETER MESSAGE
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
NOTE: Ensure that the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
Turn the ignition on.
SELECT ACTIVE or STORED DTC:
All
ACM - ACTIVE DTC
ACM - STORED DTC
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
Connect the DRBIII
t to the data link connector and select PASSIVE RESTRAINTS,
AIRBAG, SYSTEM TEST.
With the DRBIII
t, read the PCM Active on the Bus:.
Does the DRB show PCM ACTIVE ON THE BUS?
All
Yes
→ Go To 3
No
→ Refer to category 9 COMMUNICATION CATEGORY9 and select
the related symptom.
Perform __AIRBAG VERIFICATION TEST - VER 1.
159
AIRBAG
TEST
ACTION
APPLICABILITY
3
With the DRB select ENGINE, MISCELLANEOUS, SELECT MISC FUNCTION,
and then CHECK VIN to read the Vehicle Identification Number in the Powertrain
Control Module.
Compare the VIN displayed on the DRB screen and the Vehicle VIN plate.
Does the VIN plate and the PCM VIN match?
All
Yes
→ Go To 4
No
→ Replace the Powertrain Control Module and program with the
correct vehicle identification number.
Perform __AIRBAG VERIFICATION TEST - VER 1.
4
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND PERSONAL INJURY OR DEATH.
If there are no possible causes remaining, view repair.
All
Repair
Replace the Airbag Control Module in accordance with Service
Instructions.
Perform __AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
160
AIRBAG
NO ODOMETER MESSAGE —
Continued
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