Toyota Tundra Service Manual: Master Module Horizontal Axis Misalignment (C1AC1)

Toyota Tundra Service Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Blind Spot Monitor System / Master Module Horizontal Axis Misalignment (C1AC1)

DESCRIPTION

This DTC is stored when the angle of the blind spot monitor sensor RH deviates more than the allowable range from the horizontal axis.

HINT:

If a drum tester such as a speedometer tester, brake/speedometer combination tester or chassis dynamometer is used with the blind spot monitor system on, the blind spot monitor sensor may store this DTC by mistake.
When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.

DTC No.	DTC Detection Condition	Trouble Area
C1AC1	When the blind spot monitor sensor deviates 5 degrees or more from the horizontal axis when the system is activated	Blind spot monitor sensor RH

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.
If the bumper is damaged or the vehicle has a history of body repair, there is a possibility that the installation area of the blind spot monitor sensor may be deformed and the blind spot monitor sensor system may not operate correctly, so visually inspect the blind spot monitor sensor installation area (frame, stud bolt) to make sure it is not dented or bent.
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If the visual inspection finds a problem, check the installation condition of the blind spot monitor sensor, and adjust the installation position of the blind spot monitor sensor as necessary.

PROCEDURE

1.	CHECK VEHICLE CONDITION

(a) Check the condition of the rear bumper around the blind spot monitor sensors.

HINT:

When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the rear bumper, the blind spot monitor sensor may store this DTC by mistake.

Result	Proceed to
A sticker, mud, snow, ice, etc. is covering the sensor or surrounding area on the rear bumper.	A
There are scratches or dents on the rear bumper around the sensors.	B
No abnormalities.	B

GO TO STEP 3

2.	PERFORM BEAM AXIS CONFIRMATION

(a) Clean the rear bumper.

(b) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.

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NOTICE:

Before replacing the blind spot monitor sensor RH, visually check for damage to the stud bolts or area surrounding the blind spot monitor sensor RH.

If there is any damage to the stud bolts or area surrounding the blind spot monitor sensor RH, perform Blind Spot Monitor Sensor Installation Condition Inspection and adjust according to the result.

END

REPLACE BLIND SPOT MONITOR SENSOR RH

3.	CHECK INSTALLATION CONDITION

(a) Check the installation condition of the blind spot monitor sensor RH.

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OK:

The blind spot monitor installation position is within the specified range

GO TO STEP 5

4.	ADJUST THE INSTALLATION POSITION

(a) Adjust the installation position of the blind spot monitor sensor RH.

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5.	PERFORM BEAM AXIS CONFIRMATION

(a) Perform Blind Spot Monitor Beam Axis Confirmation using the Techstream.

Click here

END

REPLACE BLIND SPOT MONITOR SENSOR RH

Short to GND or Open in Buzzer (C1ABE)

Slave Module Horizontal Axis Misalignment (C1AC2)

See More:

Toyota Tundra Owners Manual > Using the driving support systems: Rear view monitor system
The rear view monitor system assists the driver by displaying an image of the view behind the vehicle with fixed guide lines on the screen while backing up, for example while parking. The screen illustrations used in this text are intended as examples, and may differ from the image that is actually ...