Dtc C1595/55 Lost Communication With Steering Angle Sensor Module

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - VARIABLE GEAR RATIO STEERING

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 CodeDTC Detection ConditionTrouble Area
C1595/55The 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
C15C4/68A 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

Dtc C1595/55 Lost Communication With Steering Angle Sensor Module. VARIABLE GEAR RATIO STEERING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

1.CHECK DTC (CAN COMMUNICATION SYSTEM)

Check for DTCs in the CAN communication system (for LHD: , for RHD: ).

Result
ResultProceed to
DTC is not outputA
DTC is output (for LHD)B
DTC is output (for RHD)C
B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) ()
A
2.CHECK STEERING ANGLE SENSOR

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

Dtc C1595/55 Lost Communication With Steering Angle Sensor Module. VARIABLE GEAR RATIO STEERING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E79 steering control ECU connector.

Disconnect the E11 steering angle sensor connector.

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

  • Standard Resistance:
  • Tester ConnectionConditionSpecified Condition
    E79-10 (SS1-) - E11-7 (SS1-)AlwaysBelow 1 Ω
    E79-19 (SS1+) - E11-8 (SS1+)
    E79-19 (SS1+) - Body groundAlways10 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
Dtc C1595/55 Lost Communication With Steering Angle Sensor Module. VARIABLE GEAR RATIO STEERING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Disconnect the E79 steering control ECU connector.

Move the shift lever to N.

Jack up the vehicle.

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 ConnectionSwitch ConditionSpecified Condition
    E79-19 (SS1+) - E79-10 (SS1-) Engine switch on (IG), steering wheel rotated slowlyPulse 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
NGA
OK (for LHD)B
OK (for RHD)C
B
REPLACE STEERING CONTROL ECU ()
C
REPLACE STEERING CONTROL ECU ()
A
REPLACE STEERING ANGLE SENSOR ()