How to Troubleshoot the Gauges and Indicators

Before troubleshooting the gauge system, refer to multiplex integrated control system test mode A troubleshooting.

The gauge control module has a self-diagnosis function.

The beeper drive circuit check
The indicator drive circuit check
The LCD segments check
The gauges drive circuit check (Speedometer, Tachometer, Fuel gauge, Coolant temperature gauge)
The communication line check (the body-controller area network (B-CAN) communicationl line, and the frame-controller area network (F-CAN) communication line between the gauges

NOTE: Indicators are also controlled via the communication line.

Entering the self-diagnosis function:

Before doing the self-diagnosis function, check the No. 7 (10A) fuse and the No. 21 ( 7.5A) fuse in the under-dash fuse/relay box.

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-diagnosis mode, the dash lights brightness controller operates normally.
While in the self-diagnosis mode, the trip/reset button is used to start the Beeper Drive Circuit Test and the Gauge Drive Cicuit Check.
If the vehicle speed exceeds 2 km/h (1.2 mph) 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 indicator lights blink.
The following indicators blink:
Seat belt indicator light, Charging system light, Low fuel indicator light, Maintenance required indicator light, Security indicator light, High beam indicatorlight, Lights on indicator light, Malfunction indicator lamp (MIL), A/T gear position indicator lights, ABS indicator light, Cruise main indicator light, Safety indicator lights.

Switch Input Check:

After the intermittent beeper sounds at the initial stage of self-diagnoisis, a beeper sounds continuously while any of the following switch inputs are switched from OFF to ON.
The following switches cause the beeper sounds:
Cruise control main switch, parking brake switch.

The LCD Segment Check:

When entering the self-diagnosis mode, the odo/trip segments and outside air temperature segment blink 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 sweep from the minimum position to 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 again until the gauge needles return to the minimum position.

If a needle fails to sweep or the beeper does not sound, replace the gauge control module.

The Communication Line Check:

In the self-diagnosis mode, after the odo/trip LCD Segments Check, the self-diagnosis starts the Communication Line Check.
If all segments comes on, the communication line is OK.

If the word ‘‘Error 1'' is indicated, there is a malfunction in the communication line between the gauge control module and the frame-controller area network (F-CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to MICS test mode A.
If the word ‘‘Error 2'' is indicated, there is a malfunction in the communication line between the gauge control module and the body-controller area network (B-CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to MICS test mode A.
If the word ‘‘Error 3'' is indicated, there is a malfunction in the communication line between the gauge control module and the body-controller area network (B-CAN) and the frame-controller area network (F-CAN). Check for DTCs in the ECM/PCM. If no DTCs are found, go to MICS test mode A.

If any communicaiton line errors are found, go to MICS test mode A.

Ending the self-diagnosis function:

Turn the ignition switch OFF.
Note: If the vehicle speed exceeds 2 km/h (1.2 mph), the self-diagnosis function ends.