Diagnostic Procedure

Step	INSPECTION		Action
1	VERIFY IF OTHER DTCs ARE DISPLAYED Clear the DTC from the SAS control module memory using the M-MDS. (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Is DTC U0073 or U0155 displayed?	Yes	Perform a separate inspection of the applicable DTCs. (See FOREWORD [MULTIPLEX COMMUNICATION SYSTEM] .)
1		No	Go to the next step.
2	INSPECT INSTRUMENT CLUSTER Verify that the correct instrument cluster is assembled. Instrument cluster assembly incorrect?	Yes	Go to the next step.
2		No	Install the instrument cluster.
3	INSPECT INSTRUMENT CLUSTER Perform the following active command mode inspection for the instrument cluster using the M-MDS. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER] .) WL+IL (See ACTIVE COMMAND MODES TABLE [INSTRUMENT CLUSTER] .) Does the air bag system warning light illuminate?	Yes	Go to the next step.
3		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
4	PERFORM SAS CONTROL MODULE DTC INSPECTION Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .) Are the same DTCs present?	Yes	Replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .)
4		No	DTC troubleshooting completed.