Toyota 4Runner: Diagnosis System
DIAGNOSIS SYSTEM
1. DIAGNOSIS
(a) If the skid control ECU detects a malfunction, the ABS and/or BRAKE warning lights and the slip indicator lights come on in accordance with the trouble area to warn the driver.
HINT:
- The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting SST between terminals 13 (TC) and 4 (CG) of the DLC3 and observing the blinking pattern of the ABS warning light and slip indicator light, or by connecting the Techstream.
- This system has a Test Mode sensor signal check function. Test mode DTCs can be read by connecting the Techstream and observing the blinking pattern of the ABS warning light and slip indicator light.
NOTICE:
If parts connected to the IG terminal circuit are damaged due to high voltage, DTCs may not be able to be output from the ABS warning light and slip indicator light by connecting SST to the DLC3. In this case, inspect the IG power source circuit.
2. WARNING LIGHT AND INDICATOR LIGHT CHECK
(a) Release the parking brake.
CAUTION:
When releasing the parking brake, set chocks to hold the vehicle for safety.
HINT:
When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.
(b) Check that the ABS warning light, BRAKE warning light and slip indicator light come on when the ignition switch is turned to ON, and go off in approximately 3 seconds.
HINT:
If the indicator remains on or does not come on, proceed to troubleshooting for the light circuit below.
|
Trouble Area |
See Procedure |
|---|---|
|
ABS warning light circuit (Remains on) |
|
|
ABS warning light circuit (Does not come on) |
|
|
BRAKE warning light circuit (Remains on) |
|
|
BRAKE warning light circuit (Does not come on) |
|
|
Slip indicator light circuit (Remains on) |
|
|
Slip indicator light circuit (Does not come on) |
|
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
HINT:
Use the table below to help determine the cause of problem symptoms.
If multiple suspected areas are listed, the potential causes of the symptoms
are lis ...
Terminals Of Ecu
TERMINALS OF ECU
1. TERMINALS OF ECU
Text in Illustration
*a
Component without harness connected
(Skid Control ECU)
-
-
Terminal ...
Other materials about Toyota 4Runner:
Using the steering wheel audio switches
Some audio features can be controlled using the switches on the steering
wheel.
Operation may differ depending on the type of audio system or navigation
system. For details, refer to the manual provided with the audio system or
navigation system.
1. ...
Acceleration Sensor Stuck Malfunction (C1232,C1243,C1245,C1279)
DESCRIPTION
The skid control ECU receives signals from the yaw rate and acceleration sensor
via the CAN communication system.
If there is trouble in the bus lines between the yaw rate and acceleration sensor
and the CAN communication system, DTCs U0123 ( ...
0.1264