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Instrument Panel, Gauges and Warning Indicators: Testing and Inspection

Self-diagnostic Function

The gauge assembly has a self-diagnostic function that checks these circuits:

- The beeper drive circuit
- The indicator drive circuit
- The LCD segments
- The gauges drive circuit (speedometer, tachometer, fuel gauge, coolant temperature gauge)
- The communication line (the coolant temperature signal line between the gauge and the ECM/PCM)




Entering the Self-diagnosis Function

Before entering the self-diagnostic function, check the No. 9 (10 A) fuse in the under-hood fuse/relay box and the No. 10 (7.5 A) fuse in the under-dash fuse/relay box.

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

NOTE:
- While in the self-diagnosis mode, the dash lights brightness controller operates normally.
- While in the self-diagnosis mode, the select/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-diagnosis mode ends.

The Beeper Drive Circuit Check

When entering the self-diagnosis mode, the beeper sounds five times.

The Indicator Drive Circuit Check

When entering the self-diagnosis mode, the following indicator lights blink:
Seat belt indicator light. Door indicator light. Brake system light. Charging system light. Low fuel indicator light, Maintenance required indicator light. Washer fluid level indicator light (Canada), Tailgate indicator light, A/T gear position indicator (except P, R, N positions).

The LCD Segments Check

When entering the self-diagnosis mode, the odo/trip segments blinks five times.




The Gauge Drive Circuit Check

When entering the self-diagnosis mode, the speedometer, the tachometer, the fuel gauge, and the coolant temperature gauge needles move from the minimum position to the maximum position, then return to the minimum position.

NOTE:
- After the beeper stops sounding and the gauge needles return to the minimum position, pushing the trip/reset button starts the beeper drive circuit check (one beep), and the gauge drive circuit check again.
- The check cannot be started until the gauge needles return to the minimum position.




The Communication Line Check

In the self-diagnosis mode, and after the odo/trip LCD segments check, the self-diagnosis starts the communication line check.
If all segments come on, the communication line is OK.
If the word "Error" is indicated, there is a malfunction in the communication line between the gauge assembly, the multiplex control unit, the keyless receiver unit, and the ECM/PCM.

Ending the Self-diagnostic Function

Turn the ignition switch OFF.

NOTE: If the vehicle speed exceeds 1.2 mph (2 km/h), the self-diagnostic function ends.

If any of the checks do not function as specified, replace the gauge assembly.
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