Combination Meters
System DescriptionUNIFIED METER CONTROL UNIT
- Speedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the unified meter control unit, which is built into the combination meter. Unified meter control unit receives signals from unified meter and A/C amp.
- Warning lamp and indicator lamp of combination meter are controlled by signals drawn from the unified meter and A/C amp.
- Digital meter is adopted for odo/trip meter.*
*The record of the odo meter 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 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 combination meter and triple meter dial lighting when the ignition switch is turned on. When the lighting switch is turned on, light on for the trip computer switch, illumination control switch and external lighting are output. In addition, when the lighting switch is turned on, the illumination control switch on the left side of the combination meter can be used to adjust the brightness of each light. Pressing the illumination control switch will brighten or darken the lights. When the key switch is in the START position, the combination meter and triple meter dial lighting and the trip computer switch and illumination control switch lighting are turned off.
UNIFIED METER AND A/C AMP.
Refer to "System Description" in "UNIFIED METER AND A/C AMP".
HOW TO CHANGE THE DISPLAY FOR 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.
Illumination Control Switch:
- Depressing the odo/trip meter switch toggles the mode in the following order.
- The odo/trip meter display mode toggling and trip display resetting can be identified by the amount of time that elapses from pressing the odo/trip meter switch to releasing it.
- When resetting with trip A displayed, only trip A display is reset (Trip B operates the same way).
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 24, and
- to unified meter and A/C amp. terminal 21.
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 23
- through 10 A fuse [No. 12, located in the fuse block (J/B)]
- to unified meter and A/C amp. terminal 22.
With the ignition switch in the ACC or ON position, power is supplied
- through 10 A fuse [No. 6, located in the fuse block (J/B)]
- to combination meter terminal 14
- through 15 A fuse [No. 10, located in the fuse block (J/B)], and
- through 15 A fuse [No. 11, located in the fuse block (J/B)]
- to unified meter and A/C amp. terminal 46.
Ground is supplied
- to combination meter terminals 10, 11 and 12
- through body grounds M30 and M66
- to unified meter and A/C amp. terminals 29 and 30
- through body grounds M30 and M66.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
ECM provides an engine coolant temperature signal to unified meter and A/C amp. with CAN communication line. Unified meter and A/C amp. provides an engine coolant temperature signal to combination meter for water temperature gauge with communication line between unified meter and A/C amp. and combination meter.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
ECM provides an engine speed signal to unified meter and A/C amp. CAN communication line. Unified meter and A/C amp. provides an engine speed signal to combination meter for tachometer with communication line between unified meter and A/C amp. and combination meter.
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
- from unified meter and A/C amp. terminal 36
- through terminals 5 and 2 of the fuel level sensor unit and fuel pump (main), and
- through terminals 2 and 1 of the fuel level sensor unit (sub)
- to unified meter and A/C amp. terminal 28 for the fuel gauge.
Unified meter and A/C amp. provides an fuel level signal to combination meter for fuel gauge with communication line between unified meter and A/C amp. and combination meter.
SPEEDOMETER
VDC/TCS/ABS control unit [with VDC system] or ABS actuator and electric unit (control unit) [without VDC system] provides a vehicle speed signal to the unified meter and A/C amp. with CAN communication line. After unified meter and A/C amp. received the vehicle speed signal, it changes the signal to 8 pulse signal to the combination meter for speedometer.