Instrument Panel, Gauges and Warning Indicators: Description and Operation

COMBINATION METERS

System Description

UNIFIED METER CONTROL UNIT
- Speedometer, odometer, tachometer, fuel gauge, oil pressure gauge, voltage gauge, A/T oil temperature gauge, and water temperature gauge are controlled by the unified meter control unit, which is built into the combination meter.
- Warning indicators are controlled by signals drawn from the CAN communication system, BCM (body control module), and components connected directly to the combination meter.
- Digital meter is adopted for odometer/trip meters*, as well as the A/T position indicator display.
*The record of the odometer is kept even if the battery cable is disconnected.

- Odometer/trip meters and A/T indicator segments can be checked in diagnosis mode.
- Meters/gauges can be checked in diagnosis mode.

Illumination control
The unified meter control unit outputs the speedometer, odometer/trip meters, tachometer, oil pressure gauge, voltage meter, A/T indicator, A/T temperature gauge, fuel and temperature gauge lighting when the ignition switch is turned on. When the lighting switch is turned on, the illumination control switch can be used to adjust the brightness of the combination meter illumination and the odometer/trip meters and meter illumination.
When the ignition switch is turned from the OFF to the ON position, the combination meter dial lighting will remain off for 0.7 seconds. For additional combination meter illumination control information, refer to "System Description".

POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times
- through 10 A fuse [No.19, located in the fuse block (J/B)]
- to combination meter terminal 8.

With the ignition switch in the ON or START position, power is supplied
- through 10 A fuse [No.14, located in the fuse block (J/B)]
- to combination meter terminal 24.

With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No.4, located in the fuse block (J/B)]
- to combination meter terminal 1.

Ground is supplied
- to combination meter terminal 17
- through body grounds M57, M61 and M79.

WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to combination meter via CAN communication lines.

ENGINE OIL PRESSURE GAUGE
The engine oil pressure gauge indicates the engine oil pressure.
The engine oil pressure gauge is regulated by the unified meter control unit and input from the oil pressure sensor.

A/T OIL TEMPERATURE GAUGE
The A/T oil temperature gauge indicates the A/T fluid temperature.
TCM (transmission control module) provides an A/T fluid temperature signal to combination meter via CAN communication lines.

VOLTAGE GAUGE
The voltage gauge indicates the battery/charging system voltage.
The voltage gauge is regulated by the unified meter control unit.

TACHOMETER
The tachometer indicates engine speed in revolutions per minute rpm).
ECM provides an engine speed signal to combination meter via CAN communication lines.

FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
The fuel gauge is regulated by the unified meter control unit and a variable resistor signal supplied
- to combination meter terminal 15.
- through fuel level sensor unit and fuel pump terminal 2
- through fuel level sensor unit and fuel pump terminal 5
- from combination meter terminal 16

SPEEDOMETER
ABS actuator and electric unit (control unit) provides a vehicle speed signal to the combination meter via CAN communication lines.

CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to LAN-26, "Information Bus". Information Bus