Lexus LX - Page 141

DTC C1595/55 Lost Communication with Steering Angle Sensor Module
DTC C15C4/68 Steering Angle Signal (Test Mode DTC)
for Preparation Click here
DESCRIPTION
Signal transmission between the steering control ECU and steering angle sensor is performed via serial communication.
If an error occurs between them in serial communication, the ECU will store DTC C1595/55.
DTC Code DTC Detection Condition Trouble Area
C1595/55
The steering control ECU detects an error in serial
communication between the ECU and steering angle
sensor.
Steering angle sensor
Steering control ECU
Harness or connector
C15C4/68
A steering signal indicating a tire angle of 36° or more (to
the left or right) is input after entering test mode.*
Steering angle sensor
Steering control ECU
Harness or connector
HINT:
*: A tire angle of 36° and a motor rotation angle of 36° correspond to the steering wheel angle. The amount of change in tire angle and motor rotation
angle is from when the mode is changed to test mode.
WIRING DIAGRAM
INSPECTION PROCEDURE
1.CHECK DTC (CAN COMMUNICATION SYSTEM)
a. Check for DTCs in the CAN communication system (for LHD: Click here, for RHD: Click here).
Result
Result Proceed to
DTC is not output A
DTC is output (for LHD) B
DTC is output (for RHD) C
B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED
WITH TROUBLESHOOTING) (Click here)
C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED
WITH TROUBLESHOOTING) (Click here)
A
2.CHECK STEERING ANGLE SENSOR