Dtc C1434 Steering Angle Sensor Output Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK TERMINAL VOLTAGE (IG, BAT)

CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

DTC C1434 Steering Angle Sensor Output Malfunction


DESCRIPTION

Steering angle sensor signals are sent to the skid control ECU via the CAN communication system. When there is a malfunction in the CAN communication system, it is detected by the steering angle sensor zero point malfunction diagnostic function.

DTC Code
DTC Detection Condition
Trouble Area
C1434
An error in communication between the skid control ECU and the steering angle sensor, or an abnormal steering angle sensor zero point.
  1. ECU-B fuse
  2. ECU-IG NO. 1 fuse
  3. Steering angle sensor power supply
  4. Steering angle sensor (Spiral cable sub-assembly)

WIRING DIAGRAM

Refer to DTC C1432 (LandCruiser RM000000XIM0Z4X_02.html).

INSPECTION PROCEDURE

NOTICE:
  1. Do not remove the steering angle sensor from the spiral cable sub-assembly.
  2. When replacing the spiral cable sub-assembly, confirm that the replacement part is of the correct specification.
  3. Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
  1. When DTC U0073, U0123, U0124 and/or U0126 is output together with DTC C1434, inspect and repair the trouble areas indicated by DTC U0073, U0123, U0124 and/or U0126 first (LandCruiser RM000000YUO0SYX.html).
  2. When any of the speed sensors or the yaw rate and acceleration sensor has trouble, DTCs for the steering angle sensor may be stored even when the steering angle sensor is normal. When DTCs for the speed sensors or yaw rate and acceleration sensor are output together with DTCs for the steering angle sensor, inspect and repair the speed sensor and yaw rate and acceleration sensor first, and then inspect and repair the steering angle sensor.
1.CHECK DTC

  1. Clear the DTCs (LandCruiser RM0000046KV016X.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON again and check that no CAN communication system DTC is output (LandCruiser RM0000046KV016X.html).

  1. Start the engine.

  1. Drive the vehicle at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left, and then check that no speed sensor or yaw rate and acceleration sensor DTCs are output (LandCruiser RM0000046KV016X.html).

    Result
    Result
    		Proceed to
    No CAN communication system, speed sensor, or yaw rate and acceleration sensor DTCs are output
    		A
    CAN communication system DTC is output (for LHD)
    		B
    CAN communication system DTC is output (for RHD)
    		C
    Speed sensor or yaw rate and acceleration sensor DTC is output
    		D
    HINT:
    1. If there is a malfunction in any of the speed sensors or the yaw rate and acceleration sensor, an abnormal value may be output although the steering angle sensor is normal.
    2. If speed sensor and yaw rate and acceleration sensor DTCs are output simultaneously, repair these two sensors first, and then inspect the steering angle sensor.


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0C5X.html)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (LandCruiser RM000001RSO0BZX.html)

D
REPAIR CIRCUIT INDICATED BY OUTPUT DTC (LandCruiser RM0000045Z601DX.html)
A


2.CHECK TERMINAL VOLTAGE (IG, BAT)

  1. Make sure that there is no looseness in the locking part and connecting part of the connectors.

  1. Disconnect the G33 steering angle sensor connector.



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

    Standard Voltage:
    Tester Connection
    		Condition
    		Specified Condition
    G33-5 (IG) - Body ground
    		Ignition switch ON
    		11 to 14 V
    G33-6 (BAT) - Body ground
    		Always
    		11 to 14 V
    Text in Illustration
    *a
    		Front view of wire harness connector
    (to Steering Angle Sensor)


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
OK


3.CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)

  1. Turn the ignition switch off.

  1. Disconnect the G33 steering angle sensor connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G33-2 (ESS) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)
OK

REPLACE SPIRAL CABLE SUB-ASSEMBLY (LandCruiser RM000000SS909QX.html)