Basic Operation

UNIFIED CONTROL METER
- Speedometer, odo/trip meter, tachometer (if equipped), fuel gauge and water temperature gauge are controlled totally by control unit built-in combination meter.
- Digital meter is adopted for odo/trip meter.*
*The record of the odometer is kept even if the battery cable is disconnected. The record of the trip meter is erased when the battery cable is disconnected.
- Odo/trip meter segment can be checked in diagnosis mode.
- Meter/gauge can be checked in diagnosis mode.




HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER


NOTE: Turn ignition switch to the "ON" position to operate odo/trip meter.

POWER SUPPLY AND GROUND CIRCUIT

Power is supplied at all times:
- through 10 A fuse [No. 12, located in the fuse block (J/B)]
- to combination meter terminal 25 (without tachometer) or 42 (with tachometer).
With the ignition switch in the ON or START position, power is supplied:
- through 10 A fuse [No. 30, located in the fuse block (J/B)]
- to combination meter terminal 26 (without tachometer) or 41 (with tachometer).
Ground is supplied:
- to combination meter terminal 27 (without tachometer) or 48 (with tachometer)
- through body grounds M28 and M54.

WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature. The reading on the gauge is based on the resistance of the thermal transmitter.
As the temperature of the coolant increases, the resistance of the thermal transmitter decreases. A variable ground is supplied to terminal 31 (without tachometer) or 43 (with tachometer) of the combination meter for the water temperature gauge. The needle on the gauge moves from "C" to "H".

TACHOMETER
The tachometer indicates engine speed in revolutions per minute (RPM).

The tachometer is regulated by a signal:
- from terminal 32 of the ECM [SR20DE and QG18DE (Calf. CA Model)] or PCM [QG18DE (except Calif. CA Model)]
- to combination meter terminal 45 for the tachometer.

FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by a variable ground signal supplied:
- to combination meter terminal 30 (without tachometer) or 44 (with tachometer) for the fuel gauge
- from terminal 2 of the fuel level sensor unit and fuel pump
- through terminal 5 of the fuel level sensor unit and fuel pump, and
- through body grounds B13 and B19.

SPEEDOMETER
The combination meter receives a voltage signal from the vehicle speed sensor for the speedometer. The voltage is supplied:
- to combination meter terminal 29 (without tachometer) or 47 (with tachometer) for the speedometer
- from terminal 1 of the vehicle speed sensor.
The speedometer converts the voltage into the vehicle speed displayed.