Kia Rio: ECM Problem Inspection Procedure - Engine Control Module (ECM) - Engine Control System - Engine Control / Fuel System - Kia Rio UB 2012-2026 Service ManualKia Rio: 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 1Ω

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 (Refer to “Intermittent Problem Inspection Procedure” in Basic Inspection Procedure).
Installation
   When replacing the ECM, the vehicle equipped with immobilizer must be performed the procedure as below. ...

ETC (Electronic Throttle Control) System
...

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