Toyota Tundra Service Manual: Steering Angle Sensor Output Malfunction (C1434)

DESCRIPTION

The skid control ECU (brake actuator assembly) receives signals from the steering angle sensor (spiral with sensor cable sub-assembly) via CAN communication.

HINT:

If there is a malfunction in the bus lines between the steering angle sensor (spiral with sensor cable sub-assembly) and the CAN communication system, DTC U0126 (Lost Communication with Steering Angle Sensor Module) is output. When U0126 is output together with C1434, inspect and repair the trouble areas indicated by U0126 first.

DTCs may be stored if one of the following occurs:

  • Steering angle sensor zero point value malfunction.
  • Steering angle sensor signal malfunction.
  • Steering angle sensor signal stuck malfunction.
  • Steering angle sensor and the yaw rate sensor values inconsistent.
  • Steering angle sensor installation abnormality.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1434

Steering Angle Sensor Output Malfunction

There is a difference between the skid control ECU (brake actuator assembly) estimated value and the steering angle sensor value due to an abnormal steering angle sensor value.

  • ECU-B NO. 1 fuse
  • ECU-IG1 NO. 2 fuse
  • Steering angle sensor (spiral with sensor cable sub-assembly) installation
  • Steering angle sensor (spiral with sensor cable sub-assembly) power supply
  • Steering angle sensor (spiral with sensor cable sub-assembly)
  • Skid control ECU (brake actuator assembly)

WIRING DIAGRAM

Refer to DTC C1432.

Click here

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following procedure.

HINT:

When a speed sensor or the yaw rate and acceleration sensor (airbag sensor assembly) is malfunctioning, DTCs for the steering angle sensor (spiral with sensor cable sub-assembly) may be stored even though the steering angle sensor (spiral with sensor cable sub-assembly) is normal. When DTCs for a speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) are output together with DTCs for the steering angle sensor (spiral with sensor cable sub-assembly), inspect and repair the speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) first, and then inspect and repair the steering angle sensor (spiral with sensor cable sub-assembly).

PROCEDURE

1.

CHECK DTC

(a) Check that no CAN communication system and speed sensor or yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output.

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Result

Proceed to

No CAN communication system, speed sensor, or yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output

A

CAN communication system DTCs are output

B

Speed sensor and/or yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output

C

HINT:

  • If a speed sensor or the yaw rate and acceleration sensor (airbag sensor assembly) is malfunctioning, DTCs for the steering angle sensor (spiral with sensor cable sub-assembly) may be stored even though the steering angle sensor (spiral with sensor cable sub-assembly) is normal.
  • If speed sensor and yaw rate and acceleration sensor (airbag sensor assembly) DTCs are output simultaneously, repair these malfunctions and then inspect the steering angle sensor (spiral with sensor cable sub-assembly).
B

INSPECT CAN COMMUNICATION SYSTEM

C

REPAIR CIRCUIT INDICATED BY OUTPUT DTC

A

2.

CHECK SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY INSTALLATION

(a) Turn the ignition switch off.

(b) Check that the steering angle sensor (spiral with sensor cable sub-assembly) has been installed properly.

Click here

OK:

The steering angle sensor (spiral with sensor cable sub-assembly) installation is normal.

NG

INSTALL SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY CORRECTLY

OK

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

(a) Remove the steering wheel and column cover.

*a

Front view of wire harness connector

(to Steering Angle Sensor (Spiral with Sensor Cable Sub-assembly))

(b) Make sure that there is no looseness at the locking part and the connecting part of the connector.

OK:

The connector is securely connected.

(c) Disconnect the J166 steering angle sensor (spiral with sensor cable sub-assembly) connector.

(d) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J166-6 (BAT) - Body ground

Always

11 to 14 V

J166-5 (IG) - Body ground

Ignition switch ON

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

OK

4.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

(a) Turn the ignition switch off.

*a

Front view of wire harness connector

(to Steering Angle Sensor (Spiral with Sensor Cable Sub-assembly))

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

NOTICE:

Before measuring the resistance of the steering angle sensor (spiral with sensor cable sub-assembly), turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or switches, or opening or closing the doors.

Standard Resistance:

Tester Connection

Condition

Specified Condition

J166-2 (ESS) - Body ground

1 minute after ignition switch off

Below 1 Ω

OK

REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (GROUND CIRCUIT)

    Steering Angle Sensor Internal Circuit (C1433)

    Yaw Rate Sensor Malfunction (C1436)

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