CLUSTER MESSAGE MISMATCH

For a complete wiring diagram Refer to Section 8W.

When Monitored:
With the ignition on following the instrument cluster (MIC) bulb check.
Set Condition:
The Occupant Restraint Controller (ORC) broadcasts the Airbag Lamp On/Off request message on the Bus one time each second. In turn, the MIC broadcasts the Airbag Lamp On/Off status message on the Bus one time each second. The ORC compares the request message and the status message and will set this DTC if they do not match.

Diagnostic Test

NOTE: Ensure that the battery is fully charged.

NOTE: When disconnecting or connecting airbag system components, the ignition must be turned off and the battery must be disconnected.

Turn the ignition on.

Select ACTIVE or STORED DTC:

ACTIVE DTC

Go To 2

STORED DTC

Go To 4

2. CHECK FOR ACTIVE MIC DTCs

With the scan tool, read active IC DTCs.

Does the scan tool display any DTCs?

Yes

(Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - DIAGNOSIS AND TESTING) for the diagnostic test procedures.
Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

Go To 3

3. VERIFY THAT THE AIRBAG LAMP REQUEST AND STATUS MESSAGE MATCH

Turn the ignition off, wait 5 seconds, then turn the ignition on. Allow the IC bulb check to complete before proceeding.
With the scan tool in ORC, select Monitor Display and select Warning Lamp Status ORC.
Compare the ABAG IND REQ BY ACM status and the ABAG IND ON BY MIC status which display as either ON or OFF.

Does the ABAG IND REQ BY ACM status match the ABAG IND ON BY MIC status?

Yes

WARNING: To avoid personal injury or death, turn the ignition off, disconnect the battery and wait two minutes before proceeding.
WARNING: If the Occupant Restraint Controller (ORC) is dropped at any time, it must be replaced. Failure to take the proper precautions could result in accidental airbag deployment and personal injury or death.
Replace the ORC in accordance with the Service Information.
Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

Replace the MIC in accordance with the Service Information.

Perform BODY VERIFICATION TEST - VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).
Perform the *AIRBAG SYSTEM VERIFICATION TEST - VER 1.

4. CHECKING STORED OR INTERMITTENT CODES

NOTE: Diagnose and repair all active codes before diagnosing stored codes. Refer to the Table of Contents in this Section for a complete list of airbag system diagnostic procedures.

With the scan tool, record and erase all DTCs in Airbag System Modules and IC.
Turn the ignition off, wait 15 seconds, then turn the ignition on.
With the scan tool, check for active DTCs in the ORC and the IC.

Does the scan tool display any active DTCs?

Yes

Select the appropriate diagnostic procedure from the Table of Contents in the applicable section.

No problem found at this time. Erase all codes before returning vehicle to customer.