Self-Diagnosis by OD OFF Indicator Lamp
DESCRIPTIONThe A/T system has two self-diagnostic systems.
The first is the emission-related on board diagnostic system (OBD-ll) performed by the TCM in combination with the ECM (ECOS control module). The malfunction is indicated by the MIL (malfunction indicator lamp) and is stored as a DTC in the ECM memory but not the TCM memory.
The second is the TCM original self-diagnosis indicated by the O/D OFF indicator lamp. The malfunction is stored in the TCM memory. The detected items are overlapped with OBD-II self-diagnostic items.
Refer to the table for the indicator used to display each self-diagnostic result.
Malfunction Indicator Lamp (MIL)
1. The maltunction indicator lamp will light up when the ignition switch is turned ON without the engine running. This is for checking a blown lamp. If the malfunction indicator lamp does not light up, refer to Diagnosis By Symptom.
2. When the engine is started, the malfunction indicator lamp should go off. If the lamp remains on, the on board diagnostic system has detected an emission-related (OBD-11) malfunction.