Toyota 4Runner: How To Proceed With Troubleshooting

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / How To Proceed With Troubleshooting

CAUTION / NOTICE / HINT

HINT:

*: Use the Techstream.

PROCEDURE

1.	VEHICLE BROUGHT TO WORKSHOP

2.	INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

3.	INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

(a) Using the Techstream, inspect the CAN communication function to make sure there are no malfunctions in the communication system.

Result	Proceed to
DTC is not output	A
DTC is output	B

HINT:

The skid control ECU sends the signals of each warning light via CAN communication.

GO TO CAN COMMUNICATION SYSTEM

4.	CHECK DTC AND FREEZE FRAME DATA*

5.	CLEAR DTC AND FREEZE FRAME DATA*

6.	PROBLEM SYMPTOM CONFIRMATION

7.	DTC CHECK AND CLEAR*

8.	PROBLEM SYMPTOM CONFIRMATION

Result	Proceed to
Symptom does not occur	A
Symptom occurs	B

GO TO STEP 11

9.	SYMPTOM SIMULATION

10.	CHECK FOR DTC (OTHER THAN CAN COMMUNICATION SYSTEM DTC)*

Result	Proceed to
DTC is not output	A
DTC is output	B

GO TO STEP 12

11.	PROBLEM SYMPTOMS TABLE

GO TO STEP 14

12.

DTC CHART

13.	CIRCUIT INSPECTION*

14.	IDENTIFICATION OF PROBLEM

15.	REPAIR OR REPLACE

16.	CONFIRMATION TEST*

END

Check For Intermittent Problems

CHECK FOR INTERMITTENT PROBLEMS 1. DESCRIPTION HINT: A momentary interruption (open circuit) in the connectors and/or wire harness between the sensors and ECUs can be detected through the ECU dat ...

Calibration

CALIBRATION 1. DESCRIPTION (a) After replacing VSC-related components, clearing and reading the sensor calibration data is necessary. (b) Follow the chart to perform calibration. Part ...

Other materials about Toyota 4Runner:

Low Pressure Malfunction in Upside of KDSS System (C1851/51,C1853/53)
DESCRIPTION In the KDSS hydraulic circuit, the fluid is contained under pressure. If the fluid temperature is 20°C (68°F), the pressure is approximately 3.0 MPa (30.6 kgf/cm2, 435 psi). DTC Code DTC Detection Condition ...

Precaution
PRECAUTION 1. IGNITION SWITCH EXPRESSION HINT: The type of ignition switch used on this model differs according to the specifications of the vehicle. The expressions listed in the table below are used in this section. Expression Ign ...