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, 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.

NOTE: Under the following conditions, the meters will perform a homing function. The meter pointers will move down slightly and then move back to the resting position. This is a normal design condition.

- Approximately 60 seconds after turning the ignition switch from the ON to the OFF position
- If the battery is disconnected and then reconnected

Illumination control
The unified meter control unit outputs the speedometer, odometer/trip meters, tachometer, oil pressure gauge, voltage gauge, A/T indicator, 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.

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 3.

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 16.

Ground is supplied
- to combination meter terminals 13 and 23
- 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 whether the engine oil pressure is low or normal.
The oil pressure gauge is controlled by the IPDM E/R (intelligent power distribution module engine room). Low oil pressure causes oil pressure switch terminal 1 to provide ground to IPDM E/R terminal 42. The IPDM E/R then signals the combination meter (unified meter control unit) via CAN communication lines and a low oil pressure indication is displayed by the oil pressure gauge.

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 9
- through fuel level sensor unit and fuel pump terminal 2
- through fuel level sensor unit and fuel pump terminal 5
- from combination meter terminal 4.

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

ODO/TRIP METER
The vehicle speed signal and the memory signals from the meter memory circuit are processed by the combination meter and the mileage is displayed.

How to Change the Display
Refer to Owner's Manual for odo/trip meter operating instructions.

CAN COMMUNICATION SYSTEM DESCRIPTION
Refer to "SYSTEM DESCRIPTION".