Initial Inspection and Diagnostic Overview
Gauge Self-Diagnostic Function
Before troubleshooting the gauge system, refer to multiplex integrated control system B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
The gauge control module has a self-diagnostic function shown:
- 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 between the gauges).
NOTE: Indicators are also controlled via the communication lines.
Entering the Self-Diagnostic Function
Before doing the self-diagnostic function, make sure the No. 7 (7.5 A) fuse, the No. 21 (7.5 A) fuse and the No. 32 (7.5 A) in the under-dash fuse/relay box.
1. Push and hold the 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 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 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 to LOCK (0), the self-diagnostic mode ends.
The Indicator Drive Circuit Check
When entering the self-diagnostic mode, the following indicators (if equipped) blink:
Seat belt indicators, charging system indicators, low fuel indicator, oil pressure indicator, high beam indicator, DRL indicator (USA models and Canada models), VSA indicator, VSA activation indicator, brake system indicator, lights-on indicator, A/T gear position indicators, ABS indicator, cruise control indicator, malfunction indicator lamp, in-bed trunk lid open indicator, transmission fluid temperature indicator, TPMS indicator, D3 indicator, washer fluid level indicator, smart maintenance indicator, back window open indicator, and TPMS malfunction indicator.
Switch Input Check
After the intermittent beeper sounds at the initial stage of self-diagnostic, a beeper sounds continuously while any of the following switch inputs are switched from OFF to ON:
Parking brake switch, VSA OFF switch, cruise control master, SET, RESUME, CANCEL switches, select switch, reset switch, and dashlights brightness controller cancel switch.
The Beeper Drive Circuit Check
When entering the self-diagnostic mode, the beeper sounds five times. The beeper is built into the gauge assembly.
The LCD Segment Check
When entering the self-diagnostic mode, all the segments blink five times.
The Gauge Drive Circuit Check
When entering the self-diagnostic mode, the speedometer, the tachometer, the fuel gauge, and the engine 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 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 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
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 there is a communication line error, the word "Error" will be indicated on the information display followed by a number.
- 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 B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis 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). Go to B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A (B1155 to B1160).
- 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 fast-controller area network (F-CAN). Check for DTCs in the PCM and troubleshoot any DTCs found. If no DTCs are found, go to B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
If any communication line errors are found, go to B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.
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.