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
.gif)
).
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 | .gif) |
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) |
|
.gif)
|
2. |
INSPECT DOWNHILL ASSIST CONTROL SWITCH |
| NG | |
REPLACE DOWNHILL ASSIST CONTROL SWITCH |
|
|
3. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU HDCS CIRCUIT) |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
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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DESCRIPTION
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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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