Battery Disconnect Precautions: ECM

WARNING: This page is about a different variant/trim than selected.

If connector is disconnected from ECM or the battery is disconnected, all adaptation values in control module are erased. DTC memory content will remain intact however. If engine is started after this, a rough, uneven idle can result. In this case, engine must be allowed to run at idle for a few minutes or a longer road test must be performed until adaptation procedure has been completed.

NOTE: Vehicles with On Board Diagnostics (OBD) II must have readiness code for Electronic Control Module (ECM) re-generated after battery has been disconnected. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.