Toyota 4Runner: Problem Symptoms Table

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / 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
Sensor and switch signal check cannot be performed	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
ABS warning light abnormal (Does not come on)	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
BRAKE warning light abnormal (Does not come on)	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
Slip indicator light abnormal (Does not come on)	Master cylinder solenoid (skid control ECU)
VSC OFF indicator light abnormal (Remains on)	VSC OFF indicator light circuit
VSC OFF indicator light abnormal (Remains on)	Master cylinder solenoid (skid control ECU)
VSC OFF indicator light abnormal (Does not come on)	VSC OFF indicator light circuit
VSC OFF indicator light abnormal (Does not come on)	Master cylinder solenoid (skid control ECU)
AUTO LSD indicator light abnormal (Remains on)	AUTO LSD indicator light circuit
AUTO LSD indicator light abnormal (Remains on)	Master cylinder solenoid (skid control ECU)
AUTO LSD indicator light abnormal (Does not come on)	AUTO LSD indicator light circuit
AUTO LSD indicator light abnormal (Does not come on)	Master cylinder solenoid (skid control ECU)
Meter buzzer abnormal	Skid control buzzer circuit
Meter buzzer abnormal	Master cylinder solenoid (skid control ECU)
TRAC OFF indicator light abnormal (Remains on)	TRAC OFF indicator light circuit
TRAC OFF indicator light abnormal (Remains on)	Master cylinder solenoid (skid control ECU)
TRAC OFF indicator light abnormal (Does not come on)	TRAC OFF indicator light circuit
TRAC OFF indicator light abnormal (Does not come on)	Master cylinder solenoid (skid control ECU)
A-TRAC indicator light abnormal (Remains on)	A-TRAC indicator light circuit
A-TRAC indicator light abnormal (Remains on)	Master cylinder solenoid (skid control ECU)
A-TRAC indicator light abnormal (Does not come on)	A-TRAC indicator light circuit
A-TRAC indicator light abnormal (Does not come on)	Master cylinder solenoid (skid control ECU)
Crawl indicator light abnormal (Remains on)	Crawl indicator light circuit
Crawl indicator light abnormal (Remains on)	Master cylinder solenoid (skid control ECU)
Crawl indicator light abnormal (Does not come on)	Crawl indicator light circuit
Crawl indicator light abnormal (Does not come on)	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 ...

Other materials about Toyota 4Runner:

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: The ECM is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system. *: Use the Techstream. PRO ...

Rear Coil Spring
Components COMPONENTS ILLUSTRATION Removal REMOVAL CAUTION / NOTICE / HINT HINT: Use the same procedure for the RH and LH sides. The procedure listed below is for the LH side. PROCEDURE 1. REMOVE REAR WHEEL 2. REMOVE REAR STAB ...