Monitor Description
WARNING: This page is about a different variant/trim than selected.
The hybrid vehicle control ECU performs many diagnostic tests to verify proper operation of internal ECU systems. In one of these diagnostics, the hybrid vehicle control ECU performs a self-test. If the hybrid vehicle control ECU detects an internal problem during this self-test, it will conclude that there is an internal malfunction. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.