Initial Inspection and Diagnostic Overview

Self-diagnostic Function

The gauge control module has a self-diagnostic 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 coolant temperature signal line between the gauge and PCM)

Entering the self-diagnostic function

Before doing the self-diagnostic function, check the No. 9 (10 A) fuse in the driver's under-dash fuse/relay box and No. 13 (7.5 A) fuse in the passenger's under-dash fuse/relay box.

With HDS

Select Body Electrical from the main menu, select functional test, then self-diagnostic function.

Without HDS

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 four times repeatedly.

NOTE:
- While in the self-diagnostic mode, the dash lights brightness controller operates normally.
- While in the self-diagnostic mode, the trip/reset button is used to start the beeper drive circuit check 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-diagnostic mode ends.






The Beeper Drive Circuit Check
When entering the self-diagnostic mode, the beeper sounds five times.

The Indicator Drive Circuit Check
ABS indicator, A/T fluid temperature indicator, A/T gear position indicator (except P, R, N), Brake system indicator, Charging system indicator, Cruise control indicator, Door/tailgate indicator, ECO indicator (2WD), Malfunction indicator lamp (MIL), Low fuel indicator, Low oil pressure indicator, Low tire pressure indicator, Maintenance required indicator, Seat belt reminder indicator, TPMS indicator, VSA activation indicator and VSA indicator, Washer fluid level indicator (Canada models).

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 and CANCEL switches.

The LCD Segment Check

When entering the self-diagnostic mode, the odo/trip segment blinks five times.

The Gauge Drive Circuit Check

When entering the self-diagnostic mode, the speedometer and 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 until the needles return to the minimum position.

If the gauge needles fail to sweep, replace the gauge control module.






The Communication Line Check

In the self-diagnostic mode, 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, check the PCM DTCs with the HDS. If U0073 and/or U0155 indicate, go to the PCM troubleshooting. If U0073 and/or U0155 does not indicate, check for loose or poor connections. If the connections are good, replace the gauge control module.






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 control module.