Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Steering Angle Sensor Module Signal Stuck In Range (C05262A)

DESCRIPTION

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

HINT:

When a malfunction occurs in the communication line to the steering angle sensor, U012687 is output.

If a DTC related to the CAN communication line is output, first troubleshoot the CAN communication line.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C05262A

Steering Angle Sensor Module Signal Stuck In Range

Normal communication between the skid control ECU and the steering angle sensor and abnormal steering angle sensor zero point.

  • Steering angle sensor
  • Wire harness and connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Operate the Techstream to clear the codes. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

Chassis > Brake/EPB > Clear DTCs

(d) Press the DTC clear button.

(e) Turn the engine switch off.

NEXT

2.

RECONFIRM DTC

(a) Turn the engine switch on (IG) and check that no CAN communication system DTCs are output.

HINT:

Click here

(b) Start the engine.

(c) Drive the vehicle at a speed of 35 km/h (22 mph) and turn the steering wheel to the right and left.

(d) Read the DTCs following the prompts on the Techstream. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

Chassis > Brake/EPB > Trouble Codes

(e) Check that no speed sensor or yaw rate sensor (yaw rate and acceleration sensor) DTCs are output.

Result

Proceed to

DTC C05262A is output.

A

CAN communication system DTCs are output.

B

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

C

HINT:

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

INSPECT CAN COMMUNICATION SYSTEM

C

REPAIR CIRCUITS INDICATED BY OUTPUT DTCS

A

3.

CHECK HARNESS AND CONNECTOR (IG1 TERMINAL)

(a) Turn the engine switch off.

*a

Front view of wire harness connector

(to Steering Angle Sensor)

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

OK:

The connector is securely connected.

(c) Disconnect the J32 steering angle sensor connector.

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

OK:

No deformation or corrosion.

(e) Turn the engine switch on (IG).

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J32-4 (IG1) - Body ground

Engine switch on (IG)

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (BAT TERMINAL)

(a) Turn the engine switch off.

*a

Front view of wire harness connector

(to Steering Angle Sensor)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

J32-5 (BAT) - Body ground

Always

11 to 14 V

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (GROUND TERMINAL)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J32-1 (ESS) - Body ground

1 minute or more after disconnecting the cable from the negative (-) battery terminal

Below 1 Ω

OK

REPLACE STEERING ANGLE SENSOR

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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