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 DRBIIIt, 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
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