Initial Inspection and Diagnostic Overview

Self-diagnostic Function

The gauge assembly 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 ECM)

Entering the self-diagnostic function

Before doing the self-diagnostic function, check the No.9 (10 A)fuse in the under-hood fuse/relay box and No.10 (7.5 A) 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-diagnostic function, the dash lights brightness controller operates normally.
- While in the self-diagnostic function, 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 function ends.

The Beeper Drive Circuit Check

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

The Indicator Drive Circuit Check

When entering the self-diagnostic function, the following indicators blink:
Seat belt indicator. Door/trunk indicator. Brake system light. Low fuel indicator. Maintenance required indicator (USA), Washer fluid level indicator (Canada), Oil pressure light, A/T gear position indicator (except P, R, N), M/T up/down shift lights.

The LCD Segment Check

When entering the self-diagnostic function, the ode/trip segment blinks five times.




The Gauge Drive Circuit Check

When entering the self-diagnostic function, the speedometer and the tachometer needles, the fuel gauge, the coolant temperature gauge, the IMA charge/assist gauge, and the battery level indicator 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 and the gauges return to the minimum position.




The Communication Line Check

After the odo/trip LCD segments check, the self-diagnostic function starts the communication line check.
If all segments comes on, the communication line is OK.
If the word "Error" is indicated, there is a malfunction in the communication line between the gauge assembly, the multiplex control unit, and the ECM.

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.