Initial Inspection and Diagnostic Overview

Steering Column Switches

Special Tool(s):

Special Tool(s)

Inspection and Verification
1. Verify the customer concern by operating the multifunction switch or ignition switch.





2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the diagnostic tool to the Data Link Connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the diagnostic tool menu. If diagnostic tool does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.
4. If diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool manual.
5. Carry out the DATA LINK DIAGNOSTICS TEST. If the diagnostic tool responds with:
^ CKT914, CKT91 or CKT693 = ALL ECUS NO RESP/NOT EQUIP, refer to Module Communications Network.
^ NO RESP/NOT EQUIP for INSTRUMENT CLUSTER, go to Module Communications Network.
^ SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the instrument cluster.
6. If the DTCs retrieved are related to the concern, go to the Instrument Cluster Diagnostic Trouble Code (DTC) Index to continue diagnostics. [1][2]Diagnostic Trouble Code Descriptions
7. If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures

Ignition Switch Mechanical Check
Test the mechanical operation of the ignition switch by rotating the lock cylinder through all switch positions. The movement should not stick or bind and should return from the START position back to the ON position without assistance (spring return). If sticking or binding is encountered, check for the following:
^ burrs on the lock cylinder key
^ insufficient lube on the lock cylinder
^ bent or damaged the ignition rod
^ object rubbing against the ignition rod
^ excessive rubbing of the actuator against the transmission shift socket
^ binding lock cylinder
^ shroud rubbing the against lock cylinder
^ burrs or foreign material around the rack and pinion actuator in the lock cylinder housing
^ insufficient lube on the actuator (Do not apply lubricant to the inside of the ignition switch.)
^ binding ignition switch
If the steering wheel lock is engaged with the wheels loaded against a curb, high effort will be necessary to turn the key from LOCK. Turn the steering wheel to either side of the lock to unload the system.