Immobilizer Indicator Light Remains ON after Engine Start

Immobilizer Indicator Light Remains ON after Engine Start

Wiring Diagram

Refer to Immobilizer Control System Wiring Circuit Diagram Immobilizer Control System Wiring Circuit Diagram.

Circuit Description

Refer to Immobilizer Indicator Light Does Not Come ON with Ignition Switch ON and Engine Stop Immobilizer Indicator Light Does Not Come ON with Ignition Switch ON and Engine Stop.

Troubleshooting

1. DTC check

Check DTC referring to
DTC Check DTC Check

Is DTC P1645 or P1646 detected?
YES -
Go to applicable DTC diag. flow.
NO -
Substitute a known-good combination meter and recheck. If still indicator light remains ON, substitute a known-good ECM and recheck.