Toyota 4Runner: Steering Angle Sensor Circuit (C15F1)

Toyota 4Runner Service Manual / Steering / Power Assist Systems / Power Steering System / Steering Angle Sensor Circuit (C15F1)

DESCRIPTION

The power steering ECU assembly receives steering angle signals from the steering angle sensor via CAN communication. The power steering ECU assembly provides appropriate assisting force in accordance with the steering angle signal.

DTC Code	DTC Detection Condition	Trouble Area
C15F1	An abnormal steering angle signal is received.	Steering angle sensor CAN communication system Power steering ECU assembly

PROCEDURE

1.	CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Check if DTC U0126 is output (See page ).

Result

Result	Proceed to
DTC U0126 is not output.	A
DTC U0126 is output.	B

HINT:

DTC U0126 indicates a CAN communication malfunction in the power steering system.

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

2.	CHECK OTHER DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

(a) Using the Techstream, check for DTCs related to the steering angle sensor and confirm that there are no problems in the vehicle stability control system (See page ).

Result

Result	Proceed to
DTC is not output.	A
DTC is output.	B

REPLACE POWER STEERING ECU ASSEMBLY

GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

VFC Solenoid Circuit (C15F0)

DESCRIPTION This circuit supplies electric power to the power steering solenoid valve. The power steering ECU assembly controls the output current to the power steering solenoid valve in accordanc ...

Lost Communication with ECM / PCM "A" (U0100,U0126,U0129)

DESCRIPTION The power steering ECU assembly receives signals from the ECM, steering angle sensor and master cylinder solenoid (skid control ECU) via the CAN communication system. DTC ...

Other materials about Toyota 4Runner:

Light Sensor Circuit Malfunction (B1244)
DESCRIPTION The automatic light control sensor detects ambient light, converts it into an electrical signal, and outputs it to the main body ECU. The main body ECU turns on or off the headlights and taillights according to the signal. DTC Code ...

Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...