Dodge Ram. Manual — part 7
TEST
ACTION
APPLICABILITY
2
With the DRBIII
t, ensure PCI Bus communications with the Instrument Cluster.
Is the Instrument Cluster communicating on the PCI Bus?
All
Yes
→ Go To 3
No
→ Refer to category COMMUNICATION CATEGORY and select the
related symptom NO RESPONSE or INSTRUMENT CLUSTER
BUS +/- SIGNAL OPEN.
Perform __AIRBAG VERIFICATION TEST - VER 1.
3
With the DRBIII
t select PASSIVE RESTRAINTS, AIRBAG and MONITOR DIS-
PLAY.
Using the DRBIII
t, read the WARNING LAMP MONITOR screen.
Select the LAMP STATUS displayed on the DRB monitors screen.
Observe the Lamp Driver State and Actual Lamp State.
Is the LAMP DRIVER and ACTUAL LAMP STATE: OK?
All
YES
Go To
4
NO
Replace Instrument Cluster.
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.
25
AIRBAG
AIRBAG WARNING INDICATOR TEST —
Continued
TEST
ACTION
APPLICABILITY
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.
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.
26
AIRBAG
AIRBAG WARNING INDICATOR TEST —
Continued
Symptom:
CALIBRATION MISMATCH
When Monitored and Set Condition:
CALIBRATION MISMATCH
When Monitored:
At ignition on and at least one supply above 8.3 volts, the ACM
compares the 6th digit of the Bus VIN message to the 6th digit of the VIN stored in the
ACM memory. (1) Light duty and (2, 3 or 4) for heavy duty.
Set Condition:
The code will be set if the 6th VIN digit of the PCI Bus message and the
stored ACM VIN do not match.
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.
27
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, TO AVOID PER-
SONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT
THE BATTERY AND WAIT TWO MINUTES BEFORE 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 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.
28
AIRBAG
CALIBRATION MISMATCH —
Continued
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