Trip Computer: Description and Operation

BOARD COMPUTER

System Description

FUNCTION
The board computer can indicate the following items.
- Outside air temperature
- DTE (distance to empty) (without NAVI)
- Trip distance
- Trip time (without NAVI)
- Average fuel consumption (without NAVI)
- Average vehicle speed (without NAVI)

OUTSIDE AIR TEMPERATURE INDICATION
The outside air temperature indication is displayed while the ignition switch is in the ON position. Signal is supplied
- through ambient sensor terminal 1
- to combination meter (board computer) terminal 33.

Indication range is between -30 and 55 degree C (-22 and 131 degree F). When outside temperature is less than 3 degree C (37 degree F), display shows ICY. In this case, the display will change to the outside air temperature mode even though the display is showing a different mode. When outside temperature is more than 55 degree C (131 degree F), indication will be blank. The indicated temperature is not affected by engine heat. It changes only when one of the following conditions exists.
- When vehicle speed is more than 20 km/h (12 MPH).
- The ignition switch has been turned OFF for more than 3.5 hours.
- When outside air temperature is less than the indicated temperature.

DTE (DISTANCE TO EMPTY) INDICATION
The range indication provides the driver with an estimation of the distance that can be driven before refueling. The range is calculated by signals from the fuel level sensor unit (fuel remaining), ECM (fuel consumption) and vehicle speed sensor (without TCS or 5-speed A/T) or the ABS actuator and electric unit (with TCS or 5-speed A/T). The indication will be refreshed every 30 seconds. When fuel remaining is less than approximately 10 l (2 5/8 US gal, 2 1/4 Imp gal), the indication will blink as a warning. If the fuel remaining is less than approximately 8 l (2 1/8 US gal, 1 3/4 Imp gal), the indication will show "---". In this case, the display will change to the DTE mode even though the display is showing a different mode. When the battery is disconnected and reconnected, DTE mode will display "---" until the vehicle is driven 500 miles (804.5 km).

TRIP DISTANCE
Trip distance is calculated by signal from the vehicle speed sensor (without TCS or 5-speed A/T) or the ABS actuator and electric unit (with TCS or 5-speed A/T). If trip distance is reset, trip time will be reset at the same time.

TRIP TIME
Trip time displays cumulative ignition switch ON time. If trip time is reset, trip distance will be reset at the same time.

AVERAGE FUEL CONSUMPTION
Average fuel consumption indication is calculated by signals from the vehicle speed sensor (without TCS or 5-speed A/T) or the ABS actuator and electric unit (with TCS or 5-speed A/T) and the ECM (fuel consumption). The indication will be refreshed every 30 seconds.

AVERAGE VEHICLE SPEED
Average vehicle speed indication is calculated by running distance and running time. The indication will be refreshed every 30 seconds. If average vehicle speed is reset, average fuel consumption will be reset at the same time. After resetting, the display will show "---" for 30 seconds.

HOW TO CHANGE/RESET INDICATION
Indication can be changed in the following order by momentarily depressing the board computer switch or the board computer steering switch.

Outside air temperature -> dte (without NAVI) -> Average fuel consumption (without NAVI) -> Average vehicle speed (without NAVI) -> Trip time (without NAVI) .Trip distance. Holding the switch for more than 0.8 second will reset the indication of the currently displayed mode (trip distance, trip time, average vehicle speed or average fuel consumption).

NOTE: After the display changes automatically, the indication can be changed to the last mode by pushing the board computer switch or the board computer steering switch.

CAN Communication System Description
Refer to LAN-20, Information Bus. Information Bus