Engine Control Module: Service and Repair
Removal
CAUTION:
When replacing the ECM, the vehicle equipped with the immobilizer must be performed procedure as below.
[In the case of installing used ECM]
1) Perform "ECM Neutral mode" procedure with GDS.
2) After finishing "ECM Neutral mode", perform "Key teaching" procedure with GDS.
[In the case of installing new ECM]
Perform "Key teaching" procedure with GDS.
1. Turn ignition switch OFF and disconnect the negative (-) battery cable.
2. Disconnect the ECM Connector (A).
3. Remove the battery .
4. Remove the mounting bolts and nut, and then remove the ECM bracket assembly (A).
Installation
CAUTION:
When replacing the ECM, the vehicle equipped with the immobilizer must be performed procedure as below.
[In the case of installing used ECM]
1) Perform "ECM Neutral mode" procedure with GDS.
2) After finishing "ECM Neutral mode", perform "Key teaching" procedure with GDS.
[In the case of installing new ECM]
Perform "Key teaching" procedure with GDS.
1. Installation is reverse of removal.
ECM installation bolt:
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
ECM bracket installation bolt:
9.8 - 11.8 N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
ECM Problem Inspection Procedure
1. TEST ECM GROUND CIRCUIT: Measure resistance between ECM and chassis ground using the backside of ECM harness connector as ECM side check point. If the problem is found, repair it.
Specification:Below 1Ohms
2. TEST ECM CONNECTOR: Disconnect the ECM connector and visually check the ground terminals on ECM side and harness side for bent pins or poor contact pressure. If the problem is found, repair it.
3. If problem is not found in Step 1 and 2, the ECM could be faulty. If so, make sure there were no DTC's before swapping the ECM with a new one, and then check the vehicle again. If DTC's were found, examine this first before swapping ECM.
4. RE-TEST THE ORIGINAL ECM: Install the original ECM (may be broken) into a known-good vehicle and check the vehicle. If the problem occurs again, replace the original ECM with a new one. If problem does not occur, this is intermittent problem .