C1436

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: C1436: Yaw Rate Sensor Malfunction

DTC C1436 - Yaw Rate Sensor 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 and detects the vehicle's condition using 2 circuits (GL1, GL2).
If there is trouble in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123 (malfunction in CAN communication with the yaw rate sensor) and U0124 (malfunction in CAN communication with the acceleration sensor) are set.
These DTCs are also output when calibration has not been completed.






WIRING DIAGRAM






INSPECTION PROCEDURE
NOTE: When replacing the yaw rate and acceleration sensor, perform zero point calibration Programming and Relearning.
HINT: When U0123, U0124 and/or U0126 is output together with C1436, inspect and repair the trouble areas indicated by U0123, U0124 and/or U0126 first U Code Charts.

PROCEDURE

1. READ VALUE ON TECHSTREAM (YAW RATE AND ACCELERATION SENSOR)
(a) Connect Techstream to the DLC3.
(b) Turn the ignition switch on (IG).
(c) Select the Data List mode on Techstream Data List / Active Test.

ABS / VSC / TRAC:





(d) Check that the yaw rate and acceleration sensor output value displayed on Techstream.
Result:





NOTE: Check the yaw rate and acceleration sensor signal after replacement Test Mode Procedure.
HINT: If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

C -- CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)
B -- REPLACE YAW RATE AND ACCELERATION SENSOR
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 installed in a tilted position.
NOTE: Check the yaw rate and acceleration sensor signal after replacement Test Mode Procedure.
HINT: If troubleshooting has been carried out according to the Problem Symptoms Table, refer back to the table and proceed to the next step Problem Symptoms Table.

NG -- INSTALL YAW RATE AND ACCELERATION SENSOR CORRECTLY
OK -- REPLACE YAW RATE AND ACCELERATION SENSOR