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Power Door Locks Inoperative Diagnostic Instructions • Perform the Diagnostic System Check – Vehicle prior to using this diagnostic procedure. • Review Strategy Based Diagnosis for an overview of the diagnostic approach. • Diagnostic Procedure Instructions provides an overview of each diagnostic category. Diagnostic Fault Information Circuit Switch Side Supply Voltage Relay Door Lock/Unlock Signal Door Latch Control Driver Door Lock Switch Ground Passenger Front Door Lock Switch Ground BCM Ground 1. Door Lock Malfunction 2. Door Lock Switch Malfunction Circuit/System Description The DR LCK fuse supplies battery positive voltage to the body control module BCM for the door lock system. The BCM supplies and monitors a reference voltage to the door lock switch through the door lock switch lock/unlock signal circuit. The door lock switch also receives a constant ground source. If a door lock switch is placed in the lock position, the reference voltage is taken directly to ground and the BCM senses 0.0 volts on the signal circuit. If a door lock switch is placed in the unlock position, the reference voltage is taken to ground through a 1.5k ohm resistor that is internal to the door lock switches and senses approximately 2.9 volts on the signal circuit. This is how the BCM determines what portion of the door lock switch was activated. The BCM, upon receipt of a door lock switch lock or unlock signal, will switch the appropriate door lock actuator control circuits to battery positive voltage. The opposing side of the door lock actuators are connected to ground internally within the BCM through the other door lock actuator control circuit and the doors will lock or unlock appropriately. Vehicles without keyless entry have two internal drivers in the BCM to control the door lock actuators. All door lock and all door unlock. Vehicles equipped with keyless entry have three internal drivers in the BCM. Driver door unlock, passenger door unlock and all door lock. This is done to isolate the driver door lock actuator so it can be unlocked by itself using the keyless entry transmitter.

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Multi-Function Switch Removal 1. Disconnect battery ground cable (14301). 2. Tilt column to lowest position and remove tilt steering column lock lever (3F527). 3. Remove ignition switch lock cylinder (11582). 4. Remove shroud screws and remove upper steering column shroud (3530) and lower steering column shroud. 5. Remove two self-tapping screws retaining multi-function switch (13K359) to steering column casting. Disengage multi-function switch from casting. 6. Disconnect the two electrical connectors. Installation 1. Install two electrical connectors to full engagement. 2. Align mounting holes in multi-function switch with corresponding holes in steering column casting. Install two self-tapping screws, making sure to start screws in the previously tapped holes. Tighten to 2-3 Nm (18-26 lb-in). 3. Install upper steering column shroud and lower steering column shroud. 4. Install ignition switch lock cylinder. 5. Install tilt steering column lock lever. 6. Connect battery ground cable. 7. Check steering column and multi-function switch for proper operation.

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Disassembly All vehicles 1. Remove the two multifunction switches. 1. Depress the retaining tangs. 2. Lift the switches upwards. 2. Detach the driver air bag module from the steering wheel. 3. Remove the driver air bag module. Release the three clips. Disconnect the air bag module electrical connector. 4. Remove the passive anti-theft system (PATS) transceiver. 5. Remove the steering wheel. 1. Disconnect the speed control electrical connector (if equipped). 2. Remove the steering wheel retaining bolt. 6. Remove the tolerance ring. 7. NOTE: Make sure the clockspring is not allowed to rotate. Secure in the central position with a piece of suitable tape. Remove the clockspring. Using a thin bladed screwdriver, release the two retaining clips. 8. Remove the ignition switch. Release the clips. 9. Remove the ignition switch lock cylinder. 1. Insert and turn the ignition key to position I (Accessory). 2. Using a thin bladed screwdriver, depress the detent. 3. Remove the ignition switch lock cylinder. Vehicles with stability assist 10. Fully extend the steering column 1. Release the locking lever. 2. Fully extend the steering column. 11. NOTE: The steering column two halves must be marked before separating. Mark the two halves of the steering column. All vehicles 12. Remove the Allen bolt. 13. Separate the steering column two halves. Vehicles with stability assist 14. Remove the steering wheel rotation sensor clamp. 1. Remove the screws. 2. Using a thin bladed screwdriver, depress the locking tangs and remove the steering wheel rotation sensor clamp. 15. Remove the steering wheel rotation sensor retaining screws. 16. Remove the steering wheel rotation sensor. Assembly Vehicles with stability assist 1. WARNING: Do not install a new steering wheel rotation sensor, if the locking pin has been removed. Failure to follow this instruction may result in personal injury. WARNING: Before fitting the steering wheel rotation sensor, make sure the rotor is in the correct position. Failure to follow this instruction may result in personal injury. Check that the alignment indicator is in the correct position.

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CAUTION: Do not remove the steering column, steering wheel and air bag module as an assembly from the vehicle unless the column is locked to prevent rotation, or lower end of steering shaft is wired in such a way to prevent the steering wheel from being rotated, as this will damage the air bag sliding contact. 1. Disconnect battery ground cable (14301). Refer to Section 14-01. 2. Remove steering wheel (3600) as described. 3. Remove steering column from vehicle as described. 4. Remove steering column lower yoke (3N725), steering column upper bearing spring (3520), suspension height sensor control ring (3C131) and steering column bearing tolerance ring (3L539). Lower Steering Column Assembly 5. Remove turn indicator cancel cam (13318) by pushing up with flat-bladed screwdriver. Note direction of flush surface. 6. Remove ignition switch (11572) assembly. 7. Remove bearing retainer (3C610) and steering column upper bearing spring. 8. Remove steel steering column bearing tolerance ring and steering column bearing sleeve (3518). 9. Remove plastic bearing retainer from ignition switch lock cylinder bore. 10. Remove metal steering column lock housing bearing (3E700) from ignition switch lock cylinder bore. 11. Note position of steering column lock gear (3E717) to actuator lock. Remove steering column lock gear. 12. Remove two pivot bolts. Use caution becausesteering column position spring (3D655) will release when bolts are removed. Remove steering column lock cylinder housing (3511). 13. Remove steering column shaft assembly from steering column. 14. Remove steering column lock lever actuator (3E715) and steering actuator housing (3F723). 15. Remove lower steering column bearing (3517) and steering column lower bearing retainer (3D681).

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Disassembly 1. Disconnect battery ground cable (14301). Refer to Section 14-01. Wait one minute for air bag diagnostic monitor (14B056) to deplete its stored energy. 2. Remove steering wheel (3600) as described. 3. Remove steering column from vehicle as described. 4. Remove steering column lower yoke (3N725), steering column upper bearing spring (3520), suspension height sensor control ring (3C131) and steering column bearing tolerance ring (3L539). Lower Steering Column Assembly 5. Remove turn indicator cancel cam (13318) by pushing up with flat-bladed screwdriver. Note direction of flush surface. 6. Remove two bolts retaining ignition switch (11572) and remove ignition switch assembly. 7. Remove bearing retainer (3C610) and steering column upper bearing spring. 8. Remove steel steering column bearing tolerance ring and steering column bearing sleeve (3518). 9. Remove plastic bearing retainer from ignition switch lock cylinder bore. Replace if damaged. 10. Remove metal steering column lock housing bearing (3E700) from ignition switch lock cylinder bore. 11. Remove steering column lock gear (3E717) from ignition switch lock cylinder bore. 12. Remove two tilt pivot bolts. Use caution as steering column position spring (3D655) will release when bolts are removed. Remove steering column lock cylinder housing (3511). 13. Remove steering gear input worm gear and rack (3524) from steering column. 14. For column shift cars, remove three screws securing shift lock actuator (3Z719) and transmission shift selector position insert (7A216). Remove transmission shift selector position insert and shift lock actuator. 15. Remove four screws securing transmission column shift selector tube (7212). 16. Remove pin retaining steering column lock pawl (3E691) from steering actuator housing (3F723) and remove steering column lock pawl.