Initial Inspection and Diagnostic Overview
Gauge Control Module Self-Diagnostic Function
The gauge control module has the self-diagnostic functions shown, and also has a customizable reset function.
- The beeper drive circuit check.
- The indicator drive circuit check.
- The switch input test.
- The LCD segments check.
- The gauges drive circuit check (speedometer, tachometer, fuel gauge, coolant temperature gauge).
- The communication line check of the body-controller area network (B-CAN) communication line and the fast-controller area network (F-CAN) communication line.
NOTE:
Indicators are also controlled via the communication lines.
Entering the self-diagnostic function with the HDS
Using the HDS, select Body Electrical, Gauges, then Function Test, and do the self-diagnostic function.
Entering the self-diagnostic function (manual method)
NOTE: This procedure takes precise timing. It may take several tries to enter the self-diagnosis mode.
Before doing the self-diagnostic function, check the No. 10 (7.5 A) fuse in the under-dash fuse/relay box and the No. 23 (10 A) fuse in the under-hood fuse/relay box.
1. Push and hold the SEL/RESET button.
2. Turn the lighting switch ON ().
3. Turn the ignition switch to ON (II).
4. Within 5 sec., turn the lighting switch OFF, then ON and OFF again.
5. Within 5 sec., release the SEL/RESET button, and then push and release the button three times repeatedly.
NOTE:
- While in the self-diagnostic mode, the dashlights brightness controller operates normally.
- While in the self-diagnostic mode, the SEL/RESET switch is used to start the Beeper Drive Circuit Test and the Gauge Drive Circuit Check.
- If the vehicle speed exceeds 1.2mph (2km/h) or the ignition switch is turned to OFF, then self-diagnosis mode ends.
The Indicator Drive Circuit Check
When entering the self-diagnostic mode, the following indicators (if equipped) blink:
ABS indicator, A/T gear position indicator, brake system indicator, charging system indicator, cruise control indicator, cruise main indicator, door indicator, DRL indicator, high beam indicator, immobilizer indicator, lights-on indicator, low tire pressure indicator, low fuel indicator, malfunction indicator lamp (MIL), maintenance required indicator, oil pressure indicator, seat belt indicator, security indicator, side airbag cutoff indicator, SRS indicator, tailgate indicator, TPMS indicator, VSA indicator, VSA activation indicator*1, VSA OFF indicator*2 and washer fluid level indicator (Canada models).
Switch Input Check
At the initial stage of the self-diagnostic function, the beep sounds intermittently, the beeper sounds continuously when any of the following switch inputs are switched from OFF to ON:
Cruise control main, SET, RESUME, CANCEL switches, SEL/RESET switch, parking brake switch, and VSA OFF switch.
The illumination volume (+) and (-) switch (dashlights brightness controller) can be tested by turning on the headlights and verifying that the dashlights brightness changes as you turn the switch from full dim to full bright.
The Beeper Drive Circuit Check
When entering the self-diagnostic mode, the beeper sounds five times.
The LCD Segment Check
When entering the self-diagnostic mode, all the segments blink five times. After that, all segments come on.
The Gauge Drive Circuit Check
When entering the self-diagnostic mode, the speedometer and tachometer needles sweep from the minimum position to maximum position, then returns to the minimum position.
NOTE:
After the beeper stops sounding and the gauge needle returns to the minimum position, pushing the SEL/RESET switch starts the Beeper Drive Circuit Check (one beep) and the Gauge Drive Circuit Check again.
The check cannot be started again until the gauge needle returns to the minimum position.
If the needle fails to sweep, or the beeper does not sound, replace the gauge control module.
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 number(s).
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 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 communication line between the gauge control module and the body-controller area network (B-CAN). Go to indicated troubleshooting.
If any F-CAN or B-CAN communication line errors are found, go to DTC check using HDS.
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.