Acceleration Sensor Output Malfunction - Vehicle Stability Control System

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C0365/28,C1234/34,C1245/32,C1245/45: Malfunction in Deceleration Sensor
C1245/45 - Acceleration Sensor Output Malfunction

DESCRIPTION

The skid control ECU receives signals from the yaw rate and acceleration sensor via the CAN communication system.

The yaw rate sensor has a built-in acceleration sensor.

If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTC U0123/62 (Lost Communication with Yaw Rate Sensor Module) is output.





*1: for 2WD

*2: for AWD

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
When U0123/62 and/or U0126/63 is output together with C0365/28, C1234/34, C1245/32 and/or C1245/45 inspect and repair the trouble areas indicated by U0123/62 and/or U0126/63 first Control Module Communication Bus OFF - Vehicle Stability Control System.

PROCEDURE

1. CHECK DTC

(a) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.

(b) Start the engine.

(c) At a speed of 30 km/h (18 mph) or more, drive the vehicle, turn the steering wheel, and decelerate (depress the brake pedal) the vehicle.

(d) Turn the ignition switch to ON again and check that no CAN communication system DTC is output Diagnosis System.

Result:





B -- INSPECT CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

2. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the yaw rate and acceleration sensor has been installed properly Installation.

OK:

The sensor should be tightened to the specified torque.

The sensor should not be tilted.

NG -- INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY Installation
OK -- Continue to next step.

3. INSPECT YAW RATE AND ACCELERATION SENSOR (IGA TERMINAL)

(a) Make sure that there is no looseness at the locking part and the connecting part of the connector.





(b) Disconnect the yaw rate and acceleration sensor connector.

(c) Turn the ignition switch to ON.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:





Text in Illustration

Text in Illustration:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (IGA CIRCUIT)
OK -- Continue to next step.

4. INSPECT YAW RATE AND ACCELERATION SENSOR (GNDA TERMINAL)

(a) Turn the ignition switch off.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





Text in Illustration

Text in Illustration:

HINT
If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR (GNDA CIRCUIT)

OK -- REPLACE YAW RATE AND ACCELERATION SENSOR Removal