Instrument Panel, Gauges and Warning Indicators: Description and Operation
System DescriptionUNIFIED CONTROL METER
- Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled totally by unified meter control unit combined with speedometer and odo/trip 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
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times
- through 7.5 A fuse [No. 28, located in the fuse block (J/B)]
- to combination meter terminal 31.
With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse [No. 11, located in the fuse block (J/B)]
- to combination meter terminal 32.
Ground is supplied
- to combination meter terminal 33
- through body grounds M14 and M68.
FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank. The reading on the gauge is based on the resistance of the fuel level sensor unit.
The fuel gauge is regulated by a variable ground signal supplied
- to combination meter terminal 47 for the fuel gauge
- through fuel level sensor unit terminal 2
- through fuel level sensor unit terminal 4
- through body grounds B106 and B116.
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.
The water temperature gauge is regulated by a variable ground signal supplied
- to combination meter terminal 46
- through thermal transmitter terminal 1.
As the temperature of the coolant increases, the resistance of the thermal transmitter decreases and 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
- to combination meter terminal 48 for the tachometer
- from ECM terminal 3.
SPEEDOMETER
The vehicle speed sensor provides a voltage signal to the combination meter for the speedometer.
The voltage is supplied
- to combination meter terminals 34 and 35 for the speedometer
- from vehicle speed sensor terminals 1 and 2.
The unified meter control unit converts the voltage to the vehicle speed and displays it on the speedometer.