5.
Disconnect the ECM connectors (A).
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.
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 contact pressure. If the problem is found, repair it.
If problem is not found in Step 1 and 2, the ECM could be faulty. If so, replace the ECM with a new one, and then check the vehicle again. If the vehicle operates normally then the problem was likely with the ECM.
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 (Refer to INTERMITTENT PROBLEM PROCEDURE in BASIC INSPECTION PROCEDURE)
After replacing an ECM, MUST input the vehicle mileage and the injector data (7 digit) of each cylinder into a new ECM.
Turn ignition switch OFF.
Disconnect the battery negative (-) cable from the battery.
Remove the battery.
Remove the left head lamp assembly. (Refer to BE group)
Disconnect the ECM connectors (A).
Remove the ECM (B) after unscrewing 4 bolts.
Install a new ECM in the reverse order of step 1 ~ 6.
ECM mounting bolts : 7.8 ~ 11.8 N·m (0.8 ~ 1.2 kgf·m, 5.8 ~ 8.7 lbf·ft)
Connect a scan tool to Data Link Connector (DLC) and turn ignition switch on.
Proceed "ECM CHANGE" procedure.
Select "ENGINE CONTROL".
Select "MANUAL SELECTION MODE".
Select "D 2.0L VGT DIESEL".
Select "COMPONET CHANGE ROUTNE"
Select "ECU CHANGE".
Press "ENTER" key.
Input the vehicle mileage and press "ENTER" key.
Wait 10 seconds with IG ON.
Turn ignition switch off.
Turn ignition switch on.
Proceed "INJECTOR CORRECTION" procedure.
Select "ENGINE CONTROL".
Select "MANUAL SELECTION MODE".
Select "D 2.0L VGT DIESEL".
Select "INJECTOR CORRECTION".
Press "ENTER" key.
Input the injector data (7 digit) written on the top of each injector with function keys ([F1] ~ [F6]) and number keys.
When "WRITING FAIL" is displayed on the scan tool, input injector data (7 digits) of each cylinder into a new ECM again as prior procedure.
