Engine Control Module (ECM) Replacement

ECM Mounting:

NOTE: To prevent internal ECM damage, the ignition must be "OFF", when disconnecting or reconnecting power to the ECM.

Remove or Disconnect:
1. Disconnect negative battery cable
2. Disconnect ECM mounting hardware
3. Disconnect ECM electrical connectors
4. Remove ECM from engine compartment

Removing/Replacing Knock Sensor Module:

5. Remove ECM access cover

Knock Sensor Module - Removing From PCM:

6. Remove knock sensor module from ECM

Install or Connect:
1. Install knock sensor module and access cover
2. Install ECM in vehicle
3. Connect ECM electrical connectors
4. Connect ECM mounting hardware
5. Connect negative battery cable

EEPROM Programming

CAUTION: The software/calibration used for ECM reprogramming must match the vehicle application, or improper operation and/or damage may occur.

^ Ensure battery is charged
^ Turn ignition "ON"
^ Ensure connections to the Data Link Connector (DLC) and battery/cigar lighter are secure
^ Follow the most current Techline terminal/equipment instructions

ECM Reprogramming Failure

^ Check ECM connections
^ Check Decline terminal/equipment for latest software version
^ Repeat reprogramming procedures. If it fails again, replace the ECM. The replacement ECM must be programmed.

ECM Functional Check

^ Refer to DIAGNOSIS, TESTING AND INSPECTION PROCEDURES / OBD DIAGNOSTIC CIRCUIT CHECK.