DSC OFF SWITCH, DSC OFF INDICATOR LIGHT

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Purpose

•  The DSC OFF switch allows for optionally enabling/disabling the TCS/DSC control at the driver's discretion.
•  The DSC OFF indicator light notifies the driver that TCS/DSC control has been disabled by operation of the DSC OFF switch.

Function

•  The DSC OFF switch sends a switch operation signal to the instrument cluster.
•  The instrument cluster turns on the DSC OFF 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 DSC OFF indicator light turns on for approx. 3 s when the ignition is switched ON.
•  When the DSC OFF switch is pressed to disable the TCS/DSC control, the DSC OFF indicator light turns on.
•  The DSC OFF indicator light illumination and TCS/DSC control conditions while operating the DSC OFF switch are as indicated in the table.

Mode

DSC OFF indicator light illumination conditions

TCS control conditions

DSC control conditions

Brake control

Engine control

Brake control

Engine control
TCS/DSC ON
Not illuminated
Permitted
Permitted
Permitted
Permitted
TCS/DSC OFF
Illuminated
Inhibited*1*2/permitted*3
Inhibited
Inhibited
Inhibited

*1  :No difference in wheel speed on front left/right wheels
*2  :Difference in wheel speed on front left/right wheels (vehicle speed 35 km/h {22 mph} or more)
*3  :Difference in wheel speed on front left/right wheels (vehicle speed less than 35 km/h {22 mph})

Construction

•  The DSC OFF switch is located on the dashboard (cluster switch).
•  The DSC OFF indicator light is built into the instrument cluster.
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Operation


DSC OFF switch

1.  When the DSC OFF switch is operated, a switch operation signal is sent (1) to the instrument cluster.

2.  Based on the switch operation signal (voltage value), the instrument cluster sends (2) the DSC OFF switch operation signal to the DSC HU/CM via CAN communication.

3.  The DSC HU/CM switches (3) the TCS/DSC ON/OFF when it receives the DSC OFF switch operation signal from the instrument cluster.

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DSC OFF indicator

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 DSC OFF indicator light turns on (3).

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Fail-safe

DTC No.

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