Dodge Ram. Manual — part 23
TEST
ACTION
APPLICABILITY
9
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.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, MAINTAIN A SAFE
DISTANCE FROM ALL AIRBAGS WHILE PERFORMING THE FOLLOWING
STEPS.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop
to stop.
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.
89
AIRBAG
LOSS OF IGNITION RUN ONLY —
Continued
Symptom:
MISSING CURRENT VIN
When Monitored and Set Condition:
MISSING CURRENT VIN
When Monitored:
The first time a new ACM is powered up it monitors the PCI Bus for 2
consecutive identical VIN messages. The complete VIN is then permanently stored into
memory and the 6th digit is used to identify a light duty (1) or heavy duty (2, 3 or 4) vehicle.
Set Condition:
If a ACM does not receive two consecutive identical VIN messages within
5.6 seconds. The active DTC will be cleared once two consecutive identical VIN messages
are received.
POSSIBLE CAUSES
PCM, PCI COMMUNICATION FAILURE
PCM VEHICLE IDENTIFICATION NUMBERS INCORRECT OR MISSING
LOW VOLTAGE TO ACM
ACM CALIBRATION MISMATCH
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
Go To
2
ACM - STORED DTC
Go To
6
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
Turn the ignition on.
NOTE: Ensure the battery is fully charged.
Connect the DRB to the data link connector and select PASSIVE RESTRAINTS,
AIRBAG, SYSTEM TEST.
With the DRBIII
t, read the system test.
Does the DRB show PCM Active on the Bus:?
All
Yes
→ Go To 3
No
→ Refer to category COMMUNICATION CATEGORY and select the
related symptom.
Perform __AIRBAG VERIFICATION TEST - VER 1.
90
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.
Disconnect the Airbag Control Module connector(s).
Connect the appropriate Load Tool adaptor to the Airbag Control Module connec-
tor(s).
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION ON, THEN RECONNECT THE BATTERY.
NOTE: Check connectors - Clean and repair as necessary.
Measure the voltage on the RUN and RUN START circuits between the Load tool
ACM Adaptor and ground.
Is either the RUN or RUN START above 8.3 volts?
All
Yes
→ Go To 5
No
→ Repair the low voltage on the Run and Run - Start circuits.
Perform __AIRBAG VERIFICATION TEST - VER 1.
5
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
Information.
Perform __AIRBAG VERIFICATION TEST - VER 1.
91
AIRBAG
MISSING CURRENT VIN —
Continued
TEST
ACTION
APPLICABILITY
6
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.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, MAINTAIN A SAFE
DISTANCE FROM ALL AIRBAGS WHILE PERFORMING THE FOLLOWING
STEPS.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop
to stop.
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.
92
AIRBAG
MISSING CURRENT VIN —
Continued
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