Toyota 4Runner manuals

Toyota 4Runner: 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 listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
  • Inspect the fuses and relays related to this system before inspecting the suspected areas below.

NOTICE:

When replacing the master cylinder or sensor, turn the ignition switch off.

Vehicle Stability Control System

Symptom

Suspected Area

See page

ABS, BA and/or EBD does not operate

Check for DTCs again and make sure that no DTC is output


IG power source circuit


Front speed sensor circuit


Rear speed sensor circuit


Master cylinder pressure sensor (check master cylinder pressure sensor by performing test mode inspection)


Check hydraulic brake booster with Techstream. If abnormal, check hydraulic circuit for leakage.


If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid


ABS, BA and/or EBD does not operate efficiently

Check for DTCs again and make sure that no DTC is output


Front speed sensor circuit


Rear speed sensor circuit


Stop light switch circuit


Master cylinder pressure sensor (check master cylinder pressure sensor by performing test mode inspection)


Check hydraulic brake booster with Techstream. If abnormal, check hydraulic circuit for leakage.


If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid


VSC and/or TRAC does not operate

Check for DTCs again and make sure that no DTC is output


IG power source circuit


Front speed sensor circuit


Rear speed sensor circuit


Yaw rate and acceleration sensor circuit


Steering angle sensor circuit


If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid


Sensor and switch signal check cannot be performed

TS and CG terminal circuit


Master cylinder solenoid (skid control ECU)


DTC check cannot be performed

Check for DTCs again and make sure that no DTC is output


TC and CG terminal circuit


IG power source circuit (high power supply voltage malfunction)


If symptoms still occur even after above circuits in suspected areas are inspected and proved to be normal, replace master cylinder solenoid


ABS warning light abnormal (Remains on)

ABS warning light circuit


IG power source circuit (high power supply voltage malfunction)


Master cylinder solenoid (skid control ECU)


ABS warning light abnormal (Does not come on)

ABS warning light circuit


Master cylinder solenoid (skid control ECU)


BRAKE warning light abnormal (Remains on)

BRAKE warning light circuit


IG power source circuit (high power supply voltage malfunction)


Master cylinder solenoid (skid control ECU)


BRAKE warning light abnormal (Does not come on)

BRAKE warning light circuit


Master cylinder solenoid (skid control ECU)


Slip indicator light abnormal (Remains on)

Slip indicator light circuit


IG power source circuit (high power supply voltage malfunction)


Master cylinder solenoid (skid control ECU)


Slip indicator light abnormal (Does not come on)

Slip indicator light circuit


Master cylinder solenoid (skid control ECU)


VSC OFF indicator light abnormal (Remains on)

VSC OFF indicator light circuit


Master cylinder solenoid (skid control ECU)


VSC OFF indicator light abnormal (Does not come on)

VSC OFF indicator light circuit


Master cylinder solenoid (skid control ECU)


AUTO LSD indicator light abnormal (Remains on)

AUTO LSD indicator light circuit


Master cylinder solenoid (skid control ECU)


AUTO LSD indicator light abnormal (Does not come on)

AUTO LSD indicator light circuit


Master cylinder solenoid (skid control ECU)


Meter buzzer abnormal

Skid control buzzer circuit


Master cylinder solenoid (skid control ECU)


TRAC OFF indicator light abnormal (Remains on)

TRAC OFF indicator light circuit


Master cylinder solenoid (skid control ECU)


TRAC OFF indicator light abnormal (Does not come on)

TRAC OFF indicator light circuit


Master cylinder solenoid (skid control ECU)


A-TRAC indicator light abnormal (Remains on)

A-TRAC indicator light circuit


Master cylinder solenoid (skid control ECU)


A-TRAC indicator light abnormal (Does not come on)

A-TRAC indicator light circuit


Master cylinder solenoid (skid control ECU)


Crawl indicator light abnormal (Remains on)

Crawl indicator light circuit


Master cylinder solenoid (skid control ECU)


Crawl indicator light abnormal (Does not come on)

Crawl indicator light circuit


Master cylinder solenoid (skid control ECU)


Multi-terrain select indicator light abnormal (Remains on)

Multi-terrain select indicator light circuit


Multi-terrain select indicator light abnormal (Does not come on)

Multi-terrain select indicator light circuit


Downhill assist control indicator light abnormal (Remains on)

Downhill assist control indicator light circuit


Master cylinder solenoid (skid control ECU)


Downhill assist control indicator light abnormal (Does not come on)

Downhill assist control indicator light circuit


Master cylinder solenoid (skid control ECU)


Test Mode Procedure
TEST MODE PROCEDURE NOTICE: After replacing the master cylinder solenoid and/or yaw rate and acceleration sensor, perform calibration. VSC is prohibited during test mode. H ...

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 ...

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Installation
INSTALLATION PROCEDURE 1. INSTALL POWER WINDOW REGULATOR MOTOR ASSEMBLY LH NOTICE: The regulator arm must be below the intermediate position when installing the rear power window regulator motor assembly. (a) Using a T25 "TORX" sock ...

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