Toyota 4Runner manuals

Toyota 4Runner: A-TRAC Indicator Light does not Come ON

DESCRIPTION

The A-TRAC does not operate even if the A-TRAC switch is pressed under the following conditions:

  • The TRAC or VSC system is faulty.
  • The temperature inside the hydraulic brake booster increases and the A-TRAC operation is suspended.

WIRING DIAGRAM

Refer to A-TRAC Indicator Light Remains 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 TRACTION CONTROL SWITCH (A-TRAC SWITCH)



NG

REPLACE TRACTION CONTROL SWITCH (A-TRAC SWITCH)

OK

3.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - A-TRAC SWITCH)



NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

READ VALUE USING TECHSTREAM (A-TRAC INDICATOR LIGHT)



OK

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


NG

REPLACE MASTER CYLINDER SOLENOID

AUTO LSD Indicator Light does not Come ON
DESCRIPTION The AUTO LSD does not operate even if the VSC OFF switch is pressed under the following conditions: The brake system is faulty. The temperature inside the hydraulic brake bo ...

TC and CG Terminal Circuit
DESCRIPTION DTC output mode is set by connecting terminals TC and CG of the DLC3. WIRING DIAGRAM HINT: When each warning light continues blinking, a ground short in the wiring of terminal TC o ...

Other materials about Toyota 4Runner:

Vehicle Speed Signal Circuit between Radio Receiver and Combination Meter
DESCRIPTION for Automatic Sound Levelizer (ASL): This circuit is necessary for the Automatic Sound Levelizer (ASL) built into the radio and display receiver assembly. The Automatic Sound Levelizer (ASL) function automatically adjusts the a ...

Pressure Sensor or Switch (C1254)
DESCRIPTION The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid. DTC Code DTC Detection Condition Trouble Area C1254 There is an accumulator pre ...

© 2016-2020 | www.to4runner.net

0.0039