Toyota Tacoma (2015-2018) Service Manual: Steering Angle Sensor (C1A47)

Toyota Tacoma (2015-2018) Service Manual / Cruise Control / Lane Departure Alert System / Steering Angle Sensor (C1A47)

DESCRIPTION

The forward recognition camera receives steering angle information from the spiral cable with sensor sub-assembly. If the forward recognition camera detects a spiral cable with sensor sub-assembly, DTC C1A47 is stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A47	Steering Angle Sensor	When the vehicle is being driven at a speed of 5 km/h (3 mph) or more 3 seconds after the ignition switch is turned to ON, a signal from the spiral cable with sensor sub-assembly indicating that there is a spiral cable with sensor sub-assembly malfunction is detected by the forward recognition camera for 5 seconds or more.	Vehicle stability control system Spiral cable with sensor sub-assembly Forward recognition camera

CAUTION / NOTICE / HINT

NOTICE:

When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera learning.
Click here
First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting.
Click here

PROCEDURE

1.	CHECK DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

HINT:

If the steering angle sensor is malfunctioning, DTCs for the vehicle stability control system will be stored. Troubleshoot the vehicle stability control system first.

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Check for DTCs.

for Vacuum Brake Booster
Click here
for Hydraulic Brake Booster
Click here

Result	Proceed to
Vehicle stability control system DTCs are not output	A
Vehicle stability control system DTCs are output (for Vacuum Brake Booster)	B
Vehicle stability control system DTCs are output (for Hydraulic Brake Booster)	C

GO TO VEHICLE STABILITY CONTROL SYSTEM

2.	CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

Click here (f) Make sure that the DTC detection conditions are met.

(f) Make sure that the DTC detection conditions are met.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

(g) Check for DTCs.

Click here

Result	Proceed to
DTC C1A47 is output	A
DTC C1A47 is not output	B

USE SIMULATION METHOD TO CHECK

3.	REPLACE FORWARD RECOGNITION CAMERA

(a) Replace the forward recognition camera.

Click here (b) Adjust the forward recognition camera.

(b) Adjust the forward recognition camera.

Click here

4.	CHECK DTC OUTPUT

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: Chassis / LKA/LDA / Trouble Codes.

(e) Clear the DTCs.

Click here (f) Make sure that the DTC detection conditions are met.

(f) Make sure that the DTC detection conditions are met.

HINT:

If the following procedure is not performed, the previously output DTC cannot be detected.

(g) Check for DTCs.

Click here

Result	Proceed to
DTC C1A47 is output	A
DTC C1A47 is not output	B

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE)

Fail-safe Chart

FAIL-SAFE CHART FAIL-SAFE FUNCTION (a) When a malfunction occurs in the lane departure alert system, a message will be displayed on the multi-information display in the combination meter assembly ...

Yaw Rate Sensor Circuit (C1AA4,C1AA5)

DESCRIPTION The forward recognition camera receives vehicle stability signals from the yaw rate and acceleration sensor (airbag sensor assembly). If the yaw rate and acceleration sensor (airbag s ...

Other materials:

Seat Position Airbag Sensor Circuit Malfunction (B1653/35)
DESCRIPTION The seat position airbag sensor circuit consists of the airbag sensor assembly and the seat position airbag sensor. DTC B1653/35 is stored when a malfunction is detected in the seat position airbag sensor assembly circuit. DTC No. DTC Detection Condition ...

Automatic transmission
Select a shift position appropriate for the driving conditions. ■ Shifting the shift lever 5-speed models While the engine switch is on, depress the brake pedal and move the shift lever. 4-speed models While the engine switch is on, depress the brake pedal and move the shift l ...

ACC Signal Circuit
DESCRIPTION This circuit detects whether the ignition switch is ACC or off, and sends this information to the main body ECU (multiplex network body ECU). WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the fo ...