Vehicle Stability Control System (For Vacuum Brake Booster)

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM (for Vacuum Brake Booster): C1440/98: Steering Angle Sensor Unusual Bank Angle Detected
C1440/98 - Steering Angle Sensor Unusual Bank Angle Detected

DESCRIPTION

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

The yaw rate sensor has a built in deceleration sensor and detects the vehicle's condition.

If there is trouble in the bus lines between the yaw rate and deceleration sensor and the CAN communication system, the DTCs U0123/62 (malfunction in CAN communication with the yaw rate sensor) and U0124/95 (malfunction in CAN communication with the deceleration sensor) are output.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
* Before proceeding with the inspection, explain to the customer that the vehicle driving record shows that the vehicle was driven on a bank at an angle of 30°, and confirm that this condition occurred.
* When replacing the yaw rate and deceleration sensor, perform zero point calibration Vehicle Stability Control System (for Vacuum Brake Booster).

HINT
When U0123/62, U0124/95 and/or U0126/63 is output together with C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, and/or C1381/97, inspect and repair the trouble areas indicated by U0123/62, U0124/95 and/or U0126/63 first U0073.

PROCEDURE

1. CHECK DTC

(a) Clear the DTC Vehicle Stability Control System (for Vacuum Brake Booster).

(b) Turn the ignition switch off.

(c) At a speed of 30 km/h (19 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





HINT
DTC C1440/98 may have been stored because the vehicle was driven on a bank at an angle of 30°or more.

D -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting

C -- REPAIR CIRCUITS INDICATED BY OUTPUT DTCS Vehicle Stability Control System (for Vacuum Brake Booster)

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

2. CHECK YAW RATE AND DECELERATION SENSOR INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the yaw rate and deceleration 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 DECELERATION SENSOR CORRECTLY Installation
OK -- Continue to next step.

3. READ VALUE USING TECHSTREAM (MOMENTARY INTERRUPTION)

(a) Using the Techstream, check for any momentary interruption in the wire harness and connector corresponding to a DTC.

ABS/VSC/TRAC





OK:

There are no momentary interruptions

HINT
Perform the above inspection before removing the sensor and connector.

NG -- CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - YAW RATE AND DECELERATION SENSOR)

OK -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION) How To Proceed With Troubleshooting

4. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - YAW RATE AND DECELERATION SENSOR)

(a) Disconnect the skid control ECU connector.





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

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE YAW RATE AND DECELERATION SENSOR Removal