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 harness connectors from the VCM.



3. Remove the VCM bracket bolts.
4. Remove the VCM and bracket from the VCM support.



5. Separate the VCM from the bracket.



6. Remove the Knock Sensor Module access cover screws.
7. Remove the Knock Sensor Module cover.



8. Gently pinch the retaining clip.




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.

9. Pull upward to remove the Knock Sensor Module.

Important: The Knock Sensor Module will be reused in the replacement VCM.

10. Carefully set the Knock Sensor Module aside in an area where it will not be damaged.
11. Do not open the Knock Sensor Module.
12. Check the replacement VCM service number in order to make sure the service number matches the original VCM service number.

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

1. Align the notches of the Knock Sensor Module with the notches in the Knock Sensor Module socket.
2. Install the Knock Sensor Module in the Knock Sensor Module socket.




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.

3. Install the Knock Sensor Module access cover on the VCM.

Tighten
Tighten the access cover screws to 5 N·m(44 lb in).




4. Install the VCM in the VCM bracket until the lock tab snaps into place.



5. Install the VCM and bracket assembly.

Tighten
Tighten the bolts to 10N·m(90 lb in).




6. Connect the harness connectors to the VCM.
7. Connect the negative battery cable.
8. Program the VCM.

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

•	The battery is fully charged.

•	The ignition is ON.

•	The Data Link Connector (DLC) is secure.

2. Refer to an updated Techline terminal and follow the instructions for VCM programming.
3. If the VCM fails to program, perform the following steps:

•	Check all the VCM connections.

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

•	Program the VCM. If the programming fails again, replace the VCM.

4. Perform the CKP System Variation Learn Procedure. Refer to Crankshaft Position System Variation Learn .
5. For a functional check, perform the Powertrain On-Board Diagnostic (OBD) System Check.