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 (Resistance): 1Ω or
less
| |
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 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, 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. |
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
(Refer to INTERMITTENT PROBLEM PROCEDURE in BASIC INSPECTION
PROCEDURE). | |