Toyota 4Runner: Acceleration Sensor Malfunction (C1420)

Toyota 4Runner Service Manual / Brake / Brake Control / Dynamic Control Systems / Vehicle Stability Control System(for Hydraulic Brake Booster) / Acceleration Sensor Malfunction (C1420)

DESCRIPTION

Refer to DTCs C1419 and C1435 (See page ).

DTC Code	DTC Detection Condition	Trouble Area
C1420	After the difference between GL1 and GL2 becomes 0.6 G or more with the vehicle stationary, the difference remains 0.4 G or more for 60 seconds or more.	Sensor installation 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 ).

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.	CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) 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

Acceleration Sensor Internal Circuit (C1419,C1435)

DESCRIPTION The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system. The yaw rate and acceleration sensor has a built-in acceleration senso ...

Open or Short in Master Cylinder Pressure Sensor (C1421,C1281,C1423,C1424)

DESCRIPTION DTC Code DTC Detection Condition Trouble Area C1421 Either condition is met: Both of the following conditions continue fo ...

Other materials about Toyota 4Runner:

Open in Stop Light Switch Circuit (C1425)
DESCRIPTION The skid control ECU receives the stop light switch assembly signal and detects the brake pedal operation status. The skid control ECU has an open detection circuit, which stores this DTC if it detects an open in the stop light input line of ...

Removal
REMOVAL PROCEDURE 1. REMOVE NO. 1 INSTRUMENT CLUSTER FINISH PANEL GARNISH 2. REMOVE NO. 2 INSTRUMENT CLUSTER FINISH PANEL GARNISH 3. REMOVE FRONT NO. 1 CONSOLE BOX INSERT 4. REMOVE FRONT NO. 2 CONSOLE BOX INSERT 5. REMOVE SHIFT LEVER KNOB SUB ...