Without Scan Tool

Entering the Self-diagnostic Function
Before doing the self-diagnostic function, check the No.9 (7.5 A) fuse in the under-hood fuse/relay box and No.10 (7.5 A) fuse in the under-dash fuse/relay box, then check for ECM/PCM DTC(s). Troubleshoot and repair the cause of the DTC(s) first.

1. Push and hold the trip/reset button.
2. Turn the lighting switch ON.
3. Turn the ignition switch ON (II).
4. Within 5 sec., turn the lighting switch OFF, then ON and OFF again.
5. Within 5 sec., release the trip/reset button, then push and release the button three times repeatedly.

NOTE:
- While in the self-diagnostic mode, the dash lights brightness controller operates normally.
- While in the self-diagnostic mode, the trip/reset button is used to start the beeper drive circuit test and the gauge drive circuit check.
- If the vehicle speed exceeds 1.2 mph (2 km/h) or the ignition switch is turned OFF, the self-diagnostic mode ends.