If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next
step See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Symptom Related
Diagnostic Procedures/Problem Symptoms Table.
NEXT -- END
Up to 08/2009
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: C1420: Acceleration Sensor
Malfunction
C1420 - Acceleration 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 a malfunction in the bus lines between the yaw rate and acceleration sensor and the CAN communication system, DTCs U0123 (Lost
Communication with Yaw Rate Sensor Module) and U0124 (Lost Communication with Lateral Acceleration Sensor Module) are set.
These DTCs are also output when calibration has not been completed.
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the yaw rate and acceleration sensor, perform zero point calibration See: Brakes and Traction Control/Antilock
Brakes / Traction Control Systems/Testing and Inspection/Programming and Relearning.
HINT
When DTC U0123, U0124 and/or U0126 is output together with DTC C1420, inspect and repair the trouble areas indicated by
DTC U0123, U0124 and/or U0126 first See: U Code Charts/U0073.
PROCEDURE
1. CHECK YAW RATE AND ACCELERATION SENSOR INSTALLATION
(a) Check that the yaw rate and acceleration sensor has been installed properly See: Brakes and Traction Control/Antilock Brakes /
Traction Control Systems/Acceleration/Deceleration Sensor/Service and Repair/Removal.
OK:
The sensor is tightened to the specified torque.
The sensor is not installed in a tilted position.
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