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
.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 TRACTION CONTROL SWITCH (A-TRAC SWITCH) |
| NG | |
REPLACE TRACTION CONTROL SWITCH (A-TRAC SWITCH) |
|
|
3. |
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - A-TRAC SWITCH) |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
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 ...
0.0039