Toyota Avalon Service & Repair Manual: Master Module Horizontal Axis Misalignment (C1AC1)

Toyota Avalon Service & Repair Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Blind Spot Monitor System(for Gasoline Model) / 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.

Detection Item

DTC Detection Condition

Trouble Area

C1AC1

Master Module Horizontal Axis Misalignment

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.

    Click here

    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

A

2.

PERFORM BEAM AXIS CONFIRMATION

(a) Clean the rear bumper.

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

Click here

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Display
Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Adjustment
OK

END
NG

REPLACE BLIND SPOT MONITOR SENSOR RH

3.

CHECK INSTALLATION CONDITION

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

Click here

HINT:

Take the appropriate action in accordance with the result.

NEXT

4.

PERFORM BEAM AXIS CONFIRMATION

(a) Install the rear bumper.

Click here

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

Click here

Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Display
Body Electrical > Blind Spot Monitor Master > Utility

Tester Display

BSM Master Beam Axis Adjustment
OK

END
NG

REPLACE BLIND SPOT MONITOR SENSOR RH

    Short to GND or Open in Buzzer (C1ABE)

    Slave Module Horizontal Axis Misalignment (C1AC2)

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