Combination Meter
Combination Meter
WARNING AND INDICATOR LIGHT
1. ABS warning light
This light illuminates when trouble occurs in electrical components of ABS (Anti-lock Brake System).
2. AIR BAG system warning light
This light illuminates when trouble occurs in Airbag system.
3. AT oil temperature warning light
This light illuminates when the ATF temperature exceeds 150 °C (302 °F).
4. Oil pressure warning light
This light illuminates when the engine oil pressure decreases below 14.7 kPa (0.15 kgf/sq.cm, 2.1 psi).
5. Brake fluid level warning/parking brake indicator light
This light illuminates when the fluid level in the brake reservoir tank lowers under specified level and/or when parking brake is applied.
6. Charge indicator light
This light illuminates when trouble occurs in charging system during engine is running.
7. CHECK ENGINE warning light
This light illuminates when trouble occurs in MFI (Multiple point Fuel Injection) system.
According to ignition switch position the warning and indicator lights will come on and/or go off under normal conditions as shown in the table.
TELLTALE (GRAPHIC MONITOR)
1. Turn signal indicator light
This light blinks (and turn signal light flashes) when the turn signal switch is turned ON.
2. Headlight beam indicator light
This light illuminates when the headlight is in high-beam position.
3. Low fuel warning light
This light illuminates when the fuel amount in fuel tank is lower than 8.0 liters (2.1 US gal, 1.8 Imp gal).
4. Seat belt warning light
This light illuminates about 6 seconds after ignition switch turns ON if the drivers' seat belt is not fastened.
5. Door open warning light
This light illuminates when one or more doors and/or rear gate are not fully closed.
6. FWD indicator light
This light illuminates when the center differential locks (with the fuse installed in the center differential locking circuit).
According to ignition switch position, the telltales will come on and/or go off under normal conditions as as shown in the table.
SPEEDOMETER
DESCRIPTION
- The speedometer system is an electric type; it uses electrical wire and drives the speedometer according to electrical signals from magnetic pick-up sensor (speed sensor 2).
- The speed sensor 2 is installed on the transmission.
- For this reason, meter trouble (meter hand vibration, cable disconnection, etc.) is eliminated and transmission mechanical noise is decreased.
- The odometer is displayed by LCD (Liquid crystal display).
OPERATION
The speed sensor 2 sends the vehicle speed signal (8 pulses per one turn of speed sensor driven shaft) to the speed detection circuit in the speedometer where this signal pulse wave is regulated.
The regulated pulse signal (4 pulses per one turn of speed sensor driven shaft) is sent to the speedometer drive circuit and odometer (trip meter) drive circuit.
NOTE: The output signal from speed detection circuit is also used in engine control module, automatic transmission control module, etc.
System Diagram:
SYSTEM DIAGRAM
SPEED SENSOR 2
DESCRIPTION
- The speed sensor 2 is a magnetic pick-up type revolution sensor.
- This sensor is installed on the transmission converter case and detects the transmission output gear rotation speed.
- 8 pulses are sent to speedometer per rotation of speed sensor driven shaft.
CONSTRUCTION
The speed sensor 2 consists of a magnetic resistance element, magnet ring, driven shaft, spring, etc.
OPERATION
1. As the driven key rotates, the magnet turns to change the magnetic field of the coil
2. The coil generates power corresponding to a change in the magnetic field.
3. One turn of the driven key in the speed sensor sends 8 pulses of AC signal to the combination meter.
TACHOMETER
The tachometer drive circuit connects to engine revolution detecting circuit in engine control module.
When the engine revolution increases/decreases, the voltage of this circuit also increases/decreases, changing the magnetic force of tachometer drive coil.
Thus, the tachometer hand moves together with engine revolution change.
WATER TEMPERATURE GAUGE
- The water temperature gauge is a cross-coil type.
- The water temperature signal is input from thermo gauge installed on the engine.
- The resistance of thermo gauge changes according to engine coolant temperature. Therefore, the current input to water temperature gauge also changes according to engine coolant temperature. Accordingly, gauge hand moves in proportion to the change in magnetic force of coil.
- When the water temperature is at approx. 70 to 100 °C (158 to 212 °F) [normal operating temperature], the meter hand is stable in the middle of indication range as shown in the graph.
FUEL GAUGE
GENERAL
- The fuel gauge is a resistance type and indicates the fuel level in the tank even when the ignition switch is in OFF position.
- All models are equipped with two fuel meter units. Two fuel meter units are installed in the fuel tank, one each at the right and left side, because the fuel tank is divided into main and sub tank area.
- The low fuel sensor (warning light switch) is installed in the main fuel meter unit.
OPERATION
Fuel warning light operation
To prevent the warning light from illuminating temporarily when the fuel amount is one-sided to the sub tank, the fuel warning light does not come ON until 3 or 4 minutes have passed after the fuel level in fuel tank was lower than specified level.
Therefore, the warning light comes ON about 3 to 4 minutes after the ignition switch is turned to ON when the fuel amount in fuel tank is lower than specified level.
Fuel Gauge Circuit Schematic:
CIRCUIT DIAGRAM