Notice: In order to prevent possible electrostatic discharge (ESD) damage to the VCM, do not touch the connector pins or soldered components on the circuit board.

Important: 

A shorted solenoid, relay coil, or harness will not damage the output driver module (ODM) in the VCM. A shorted solenoid, relay coil, or harness will cause the circuit and the controlled component to be inoperative.

When the circuit fault is not present or the technician has repaired the fault, the output driver module (ODM) will again operate in a normal manner due to its fault protected design.

Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

1. Disconnect the negative battery cable.



2. Remove the spring retainers off the edges of the VCM.
3. Slide the VCM out of the bracket at an angle.



4. Disconnect the connectors from the VCM.




Important: The remaining steps are only necessary for a VCM replacement:

5. Remove the access cover fasteners.
6. Remove the knock sensor (KS) module access cover.




Important: Since the KS module will be used in the replacement VCM, place the KS module in an area where it will not be damaged.

7. Gently pinch the retaining clip.



8. Pull upward to remove the KS module.

Important: Ensure that the VCM being installed is the original VCM, or that the replacement VCM service number is identical to the original VCM service number.

Notice: In order to prevent possible electrostatic discharge (ESD) damage to the VCM, do not touch the connector pins or soldered components on the circuit board.

Important: Steps 1-4 are only necessary for a replacement VCM installation.

1. Align the notches of the knock sensor (KS) module with the notches in the in the KS module socket.

Important: Press only on the ends of the KS module. Gently press on the KS module until it is firmly seated in the socket. Listen for the click.

2. Install the KS module in the KS module socket.



3. Install the access cover on the VCM.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

4. Install the access cover screws.

Tighten
Tighten the access cover screws to 5.0 N·m (44 lb in).




5. Install the connectors to the VCM.



6. Install the VCM in the engine compartment.
7. Install the retaining springs over the edges of the VCM.
8. Connect the negative battery cable.
9. Program the VCM.

1. Take the following steps in order to set-up for the VCM (EEPROM) Programming.

•	The battery is fully charged.

•	The ignition is ON.

•	The data link connector (DLC) is secure.

2. Refer to up-to-date Techline terminal and equipment user's instructions in order to program the VCM.
3. If the VCM fails to program, do the following functions:

•	Check all the VCM connections.

•	Check the Techline terminal and equipment for the latest software version.

•	Try again to program the VCM. If it fails again, replace the VCM.

4. Perform the Passlock Reprogramming Procedure. Refer to Passlock Reprogramming procedure in Theft Deterrent.
5. Perform the CKP System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn .
6. For a functional check perform the Powertrain On-Board Diagnostic (OBD) System Check. Refer to Powertrain On Board Diagnostic (OBD) System Check .