Steering Mounted Controls Communication Module: Service and Repair

MODULE-STEERING CONTROL

WARNING: TO AVOID PERSONAL INJURY OR DEATH, ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, AIRBAG, OCCUPANT CLASSIFICATION SYSTEM, SEAT BELT TENSIONER, IMPACT SENSOR, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE SUPPLEMENTAL RESTRAINT SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT.

CAUTION: A service replacement Steering Control Module (SCM) is shipped with the clockspring pre-centered and with a molded plastic locking pin installed. This locking pin should not be removed until the SCM has been installed on the steering column. If the locking pin is removed before the SCM is installed on a steering column, the clockspring centering procedure must be performed.

NOTE: Before starting this procedure, be certain to turn the steering wheel until the front wheels are in the straight-ahead position and that the entire steering system is locked or inhibited from rotation.

REMOVAL




1. Place the front wheels in the straight ahead position.
2. Disconnect and isolate the battery negative cable.
3. Remove the driver airbag from the steering wheel.
4. Disconnect the steering wheel wire harness connectors from the upper clockspring rotor connector receptacles.

CAUTION: Be certain that the screws that secure the steering wheel puller to the steering wheel are fully engaged in the steering wheel armature without passing through the steering wheel and damaging the clockspring.

5. Remove the steering wheel from the steering column.
6. Remove the shrouds from the steering column.
7. Remove the right (wiper ) multi-function switch (3) from the SCM (4).
8. Remove the left (lighting) multi-function switch (1) from the SCM.
9. Remove the hazard switch (2) from the SCM.




10. Disconnect the two instrument panel wire harness connectors (3 & 4) from the two connector receptacles located below the steering column (5) on the back of the SCM case (2).




11. Remove the two screws (1) that secure the SCM (G3)to the steering column housing (2).
12. Remove the SCM from the steering column housing. The SCM/clockspring cannot be repaired. It must be replaced if faulty or damaged, or if the driver airbag has been deployed.
13. If the removed SCM is to be reused, be certain to secure the clockspring rotor to the SCM case to maintain clockspring centering until it is reinstalled on the steering column. If clockspring centering is not maintained, the clockspring must be centered again before it is reinstalled.
14. Remove the turn signal cancel cam from the clockspring rotor of the SCM.

INSTALLATION




1. Reinstall the turn signal cancel cam onto the clock-spring rotor of the SCM.
2. While holding the centered clockspring rotor and the SCM case (3) stationary in relation to each other, carefully slide the SCM down over the steering column upper shaft.
3. Install and tighten the two screws (1) that secure the SCM to the steering column housing (2). Tighten the screws to 2 N.m (20 in. lbs.).




4. Reconnect the two instrument panel wire harness connectors (3 & 4) to the two connector receptacles located below the steering column (5) on the back of the SCM case (2).




5. Reinstall the hazard switch (2) onto the SCM (4).
6. Reinstall the left (lighting) multi-function switch (1) onto the SCM.
7. Reinstall the right (wiper ) multi-function switch (3) onto the SCM.
8. Reinstall the shrouds onto the steering column.
9. If a new SCM has been installed, remove the plastic locking pin that is securing the clockspring rotor to the SCM case to maintain clockspring centering.
10. Reinstall the steering wheel onto the steering column.
11. Reconnect the steering wheel wire harness connectors to the upper clockspring rotor connector receptacles. Be certain that the steering wheel wire harness is routed between the steering wheel back trim cover and the steering wheel armature.
12. Reinstall the driver airbag onto the steering wheel.
13. Reconnect the battery negative cable.

NOTE: Whenever the SCM is replaced with a new unit, it is necessary to configure the new module for certain optional equipment in the vehicle using a diagnostic scan tool. Follow the programming steps outlined in the diagnostic scan tool for "Configure SCM" under "Miscellaneous Functions" for the "SCM/Steering Control Module" menu item as appropriate.