Toyota 4Runner: Yaw Rate Sensor Malfunction (C1436)

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Yaw Rate Sensor Malfunction (C1436)

DESCRIPTION

Refer to DTC C1419 and C1435 (See page ).

DTC Code	DTC Detection Condition	Trouble Area
C1436	Either condition is met: With the vehicle stationary, the yaw rate and acceleration sensor output value is not 0°/s. An abnormal comparison value.	Yaw rate and acceleration sensor

WIRING DIAGRAM

Refer to DTCs C1232, C1243 and C1245 (See page ).

CAUTION / NOTICE / HINT

NOTICE:

When replacing the yaw rate and acceleration sensor, perform calibration (See page ).

Check the yaw rate and acceleration sensor signal after replacement (See page ).

PROCEDURE

1.	CHECK DTC (CAN COMMUNICATION SYSTEM)

(a) Check for DTCs (See page ).

Result

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

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

2.	READ VALUE USING TECHSTREAM (YAW RATE SENSOR)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(d) Turn the Techstream on.

(e) Select the Data List mode on the Techstream (See page ).

ABS/VSC/TRAC

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Yaw Rate Sensor	Yaw rate and acceleration sensor 1 reading/ Min.: -128°/s, Max.: 127°/s	Vehicle stationary: 0°/s Right turn: -128 to 0°/s Left turn: 0 to 127°/s	-

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Yaw Rate Sensor

Yaw rate and acceleration sensor 1 reading/ Min.: -128°/s, Max.: 127°/s

Vehicle stationary: 0°/s

Right turn: -128 to 0°/s

Left turn: 0 to 127°/s

(f) Check that the yaw rate and acceleration sensor output value is displayed on the Techstream.

Result

Result		Proceed to
NG	Yaw rate and acceleration sensor output value is 0°/s when vehicle is stationary, but value fluctuates when turning	A
NG	Yaw rate and acceleration sensor output value is not 0°/s when vehicle is stationary	B
OK		C

REPLACE YAW RATE AND ACCELERATION SENSOR

USE SIMULATION METHOD TO CHECK

3.	CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the yaw rate and acceleration sensor is installed properly (See page ).

OK:

The sensor is tightened to the specified torque.

The sensor is not installed at an angle.

REPLACE YAW RATE AND ACCELERATION SENSOR

INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY

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