Initial Inspection and Diagnostic Overview

Gauge Self-Diagnostic Function

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

- The beeper drive circuit check.
- The indicator drive circuit check.
- The switch input test.
- The LCD segments check.
- The gauge drive circuit check (Speedometer, Tachometer, Fuel gauge, and Coolant temperature gauge).
- The communication line check (the coolant temperature signal and vehicle speed signal line between the gauge control module and the ECM/PCM).

Entering the Self-Diagnostic 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 TRIP/RESET button.

2. Turn the combination light switch () ON.

3. Turn the ignition switch to ON (II).

4. Within 5 sec., turn the combination light switch () OFF, then ON and OFF again.

5. Within the next 5 sec., release the TRIP/RESET button, then push and release the button three times.

NOTE:

- While in the self-diagnostic mode, the dashlights brightness controller does not operate.
- While in the self-diagnostic mode, the TRIP/RESET switch 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 to LOCK (0), the self-diagnostic mode ends.






The Indicator Drive Circuit Check

When entering the self-diagnostic mode, these indicators (if equipped) blink:

ABS indicator, A/T gear position indicator (1, 2, D, N, R, P), Brake system indicator, Charging system indicator, Cruise control indicator, Cruise main indicator ('09-11 models), Door indicator, D3 indicator (A/T), Lights-on indicator, Low fuel indicator, Low oil pressure indicator, Low tire pressure indicator, Maintenance required indicator, Malfunction indicator lamp (MIL), Seat belt reminder indicator, TPMS indicator, VSA activation indicator ('07-08 models), VSA indicator, VSA OFF indicator ('09-11 models), and Washer fluid level indicator (Canada models).

Switch Input Check

At the initial stage of the self-diagnostic function, the beeper sounds intermittently. The beeper sounds continuously when any of the following switch inputs are switched from OFF to ON:

Cruise control main, SET/DECEL, RESUME/ACCEL, CANCEL switches, TRIP/RESET switch, parking brake switch, and VSA OFF switch.

The Beeper Drive Circuit Check

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

The LCD Segments Check

When entering the self-diagnostic mode, the odo/trip display segments blink five times.

The Gauge Drive Circuit Check

When entering the self-diagnostic 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, pressing 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 the minimum position.






The Communication Line Check

While in the self-diagnostic mode, the Communication Line Check starts after the LCD Segments Check.

If all segments come on, the communication line is OK. If faulty, the word Error will be indicated on the odometer display followed by a number.

Error Code List





Example Indication





- If the word "Error 1" is indicated, there is a malfunction in the communication line between the gauge control module and the fast-controller area network (F-CAN). Check for DTCs in the ECM/PCM and troubleshoot any DTCs found. If no DTCs are found, go to indicated troubleshooting.
- If the word "Error 2" is indicated, there is a malfunction in the UART communication line between the gauge control module and the multiplex control unit. Go to the gauge control module input test and check the terminal No. 27. If the wire harness is OK, substitute a known-good gauge control module and recheck.
- If the word "Error 3" is indicated, there is a malfunction in the communication line between the gauge control module and F-CAN and UART. Check for DTCs in the ECM/PCM and troubleshoot any DTCs found.

Ending the Self-Diagnostic Function

Turn the ignition switch to LOCK (0).

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