OFF-ROAD TRACTION ASSIST SWITCH, OFF-ROAD TRACTION ASSIST INDICATOR LIGHT

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Purpose

•  The Off-Road Traction Assist switch, located on the dashboard, allows for optionally enabling/disabling the Off-Road Traction Assist at driver discretion.
•  The Off-Road Traction Assist indicator light, built into the instrument cluster, informs the driver that Off-Road Traction Assist has been disabled by operation of the Off-Road Traction Assist switch.

Functions

•  The Off-Road Traction Assist switch sends a switch operation signal to the instrument cluster.
•  The instrument cluster turns on the Off-Road Traction Assist indicator light based on the system condition display request signal sent via CAN communication from the DSC HU/CM.
•   When the DSC system and CAN lines are functioning normally, the Off-Road Traction Assist indicator light turns on for approx. 3 s when the ignition is switched ON.
•  The Off-Road Traction Assist control conditions when the Off-Road Traction Assist indicator light is on or off are as shown in the table.

 

Off-Road Traction Assist indicator light illumination conditions

Off-Road Traction Assist conditions

Brake control

Engine control

4WD control
Off-Road Traction Assist ON
Illuminated
Permitted
Inhibited*1
Permitted
Off-Road Traction Assist OFF
Not illuminated
Permitted
Permitted
Permitted

*1  :Vehicle speed less than 35 km/h {22 mph}

Construction

•  The Off-Road Traction Assist switch is located on the dashboard (cluster switch).
•  The Off-Road Traction Assist indicator light is built into the instrument cluster.
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Operation


Off-Road Traction Assist switch

1.  When the Off-Road Traction Assist switch is operated, the Off-Road Traction Assist switch operation signal is sent (1) to the instrument cluster.
2.  Based on the switch operation signal (detected voltage value), the instrument cluster sends (2) the Off-Road Traction Assist switch operation signal to the DSC HU/CM via CAN communication.
3.  When DSC HU/CM receives the Off-Road Traction Assist switch operation signal from the instrument cluster, it switches (3) the Off-Road Traction Assist to operational or non-operational.
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Off-Road Traction Assist indicator light

1.  The instrument cluster receives (1) the system conditions display request signal from the DSC HU/CM via CAN communication.

2.  The instrument cluster turns the transistor on (2) based on the system condition display request signal.

3.  When the transistor turns on, the Off-Road Traction Assist indicator light turns on (3).

Note
•  When the DSC system and CAN lines are functioning normally, the Off-Road Traction Assist indicator light turns on for approx. 3 s when the ignition is switched ON.
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Fail-safe

DTC No.

Fail-safe function
C0089:64
•  Permits the control and does not illuminate each warning/indicator light.