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.

Important: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.

1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.

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.

Important: Disconnecting the VCM will not erase the CKP System Variation Learn as long as the ignition switch is in the OFF position.

2. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.



3. Remove the VCM protective cover.



4. Release the VCM snap retainer.



5. Remove the VCM from the VCM bracket.



6. Remove the retainer clips and VCM connectors.



7. Steps 6-8 are only necessary for a VCM replacement:

Remove the access cover screws.

8. Remove the VCM access cover.




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

9. Gently pinch the retaining clip and pull upward to remove the Knock Sensor 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.

Steps 1-4 are only necessary for a new VCM installation:

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.

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

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.

2. Install the Knock Sensor Module in the Knock Sensor 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 4.8 N·m (42 lb in).




5. Connect the VCM connectors and retainer clips.



6. Insert the VCM into the VCM bracket.

Ensure that the VCM is fully seated, so that the snap retainer is up into its normal position and is capable of retaining the module.




7. Fasten the snap retainer.



8. Install the VCM protective cover.
9. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection in Engine Electrical.
10. Program the VCM.

Important: Do not attempt to start the engine until the VCM has been programmed. False DTCs may be set.

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 user's instructions for VCM programming.
3. If the VCM fails to program, do the following functions:

•	Check all the VCM connections.

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

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

4. This step is not necessary if a NEW unused service VCM is being installed.

Perform the Passlock Reprogramming procedure. Refer to PASSLOCK Reprogramming Seed and Key .

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.