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)

Turn ignition switch OFF.

Remove the battery negative (-) cable from the battery.

Disconnect the ECM connector (A) and unfasten the mounting bolts under the instrument panel.

Install a new ECM according to the reverse order of step 1, 2, and 3.

Connect a scan tool to Data Link Connector (DLC).

Connect the negative (-) battery cable.

Turn ignition switch on.

Proceed "INJECTOR SPECIFIC DATA" procedure.

(1)

Select "ENGINE (DIESEL)"

(2)

Select "INJECTOR SPECFIC DATA".

(3)

Press "ENTER" key.

(4)

Input the injector data (7 digit) written on the top of each injector with function keys ([F1] ~ [F6]) and number keys.

Wait 10 seconds after displaying "WRITING COMPLETE", turn ignition switch OFF.

note

When "WRITING FAIL" is displayed on the scan tool, input injector data (7 digits) of each cylinder into a new ECM again starting from 7th step.