Toyota Tundra Service Manual: Steering Angle Sensor (C1A47)

Toyota Tundra Service Manual / Vehicle Interior / Pre-collision / Pre-collision System / Steering Angle Sensor (C1A47)

DESCRIPTION

The millimeter wave radar sensor assembly receives steering angle information from the steering angle sensor (spiral with sensor cable sub-assembly). If the millimeter wave radar sensor assembly detects a steering angle sensor (spiral with sensor cable sub-assembly) malfunction, DTC C1A47 will be stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1A47	Steering Angle Sensor	While the vehicle is being driven at a speed of 50 km/h (32 mph) or more, the millimeter wave radar sensor assembly receives a steering angles ensor (spiral with sensor cable sub-assembly) malfunction signal continuously for 1 second or more.	Vehicle stability control system Millimeter wave radar sensor assembly

CAUTION / NOTICE / HINT

NOTICE:

When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
If the millimeter wave radar sensor assembly has been replaced, be sure to perform millimeter wave radar sensor assembly adjustment.
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The pre-collision system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to How to Proceed with Troubleshooting.
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PROCEDURE

1.	CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)

HINT:

Pre-collision system DTC C1A47 may be stored due to a malfunction in the vehicle stability control system. Therefore, it is necessary to check for and troubleshoot vehicle stability control system DTCs first.

(a) Check for DTCs.

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Result	Proceed to
Vehicle stability control system DTCs are not output	A
Vehicle stability control system DTCs are output	B

GO TO VEHICLE STABILITY CONTROL SYSTEM

2.	CHECK FOR DTCs (PRE-COLLISION SYSTEM)

(a) Clear the DTCs.

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

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

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

USE SIMULATION METHOD TO CHECK

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

Yaw Rate Sensor (C1A46)

Brake System Malfunction (C1A50)

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