Toyota 4Runner manuals

Toyota 4Runner: Downhill Assist Control Indicator Light Remains ON

DESCRIPTION

When the downhill assist control switch is turned on, the downhill assist control function is available and the downhill assist control indicator light illuminates.

WIRING DIAGRAM

Refer to Downhill Assist Control Indicator Light does not Come ON (See page ).


CAUTION / NOTICE / HINT

NOTICE:

When replacing the master cylinder solenoid, perform calibration (See page ).


PROCEDURE

1.

CHECK CAN COMMUNICATION LINE

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Select CAN Bus Check from the System Selection Menu screen and follow the prompts on the screen to inspect the CAN bus (See page ).


OK:

CAN Bus Check indicates no malfunctions in CAN communication.


NG

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

OK

2.

INSPECT DOWNHILL ASSIST CONTROL SWITCH



NG

REPLACE DOWNHILL ASSIST CONTROL SWITCH

OK

3.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU HDCS CIRCUIT)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

READ VALUE USING TECHSTREAM (DOWNHILL ASSIST CONTROL LIGHT)



A

REPLACE MASTER CYLINDER SOLENOID


B

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

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Downhill Assist Control Indicator Light does not Come ON
DESCRIPTION Even if the downhill assist control switch is pressed, the downhill assist control indicator light blinks and downhill assist control does not activate under the following conditions: ...

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