Dtc C1595/55 Lost Communication With Steering Angle Sensor Module

Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200
Variable Gear Ratio Steering. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC (CAN COMMUNICATION SYSTEM)

CHECK STEERING ANGLE SENSOR

CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ANGLE SENSOR)

CHECK STEERING ANGLE SENSOR

DTC C1595/55 Lost Communication with Steering Angle Sensor Module

DTC C15C4/68 Steering Angle Signal (Test Mode DTC)


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.
  1. Steering angle sensor
  2. Steering control ECU
  3. 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.*
  1. Steering angle sensor
  2. Steering control ECU
  3. 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


Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C1595/55 Lost Communication With Steering Angle Sensor Module


INSPECTION PROCEDURE

1.CHECK DTC (CAN COMMUNICATION SYSTEM)

  1. 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

  1. Check if a steering angle sensor that complies with the vehicle specifications is installed.

    OK:
    A steering angle sensor that complies with the vehicle specification is installed.


NG
REPLACE STEERING ANGLE SENSOR (Click here)
OK


3.CHECK HARNESS AND CONNECTOR (STEERING CONTROL ECU - STEERING ANGLE SENSOR)

Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C1595/55 Lost Communication With Steering Angle Sensor Module

  1. Disconnect the E79 steering control ECU connector.

  1. Disconnect the E11 steering angle sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E79-10 (SS1-) - E11-7 (SS1-)
    		Always
    		Below 1 Ω
    E79-19 (SS1+) - E11-8 (SS1+)
    E79-19 (SS1+) - Body ground
    		Always
    		10 kΩ or higher
    E79-10 (SS1-) - Body ground
    E79-19 (SS1+) - E79-10 (SS1-)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK STEERING ANGLE SENSOR


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Variable Gear Ratio Steering.Variable Gear Ratio Steering System. Dtc C1595/55 Lost Communication With Steering Angle Sensor Module

  1. Disconnect the E79 steering control ECU connector.

  1. Move the shift lever to N.

  1. Jack up the vehicle.

  1. Check the waveform of the steering angle sensor using an oscilloscope.

    HINT:
    The voltage must be measured with the steering angle sensor connector connected.
    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    E79-19 (SS1+) - E79-10 (SS1-)
    		Engine switch on (IG), steering wheel rotated slowly
    		Pulse generation
    (0 to 5 V)
    HINT:
    The output voltage should fluctuate up and down similarly to the diagram when the wheel is turned slowly.
    Result
    Result
    Result    		Proceed to
    NG
    		A
    OK (for LHD)
    		B
    OK (for RHD)
    		C


B
REPLACE STEERING CONTROL ECU (Click here)

C
REPLACE STEERING CONTROL ECU (Click here)
A

REPLACE STEERING ANGLE SENSOR (Click here)