Toyota Yaris: Front Radar Sensor System / Front Radar Sensor Optical Axis Misalignment Malfunction (C1A1100)

Toyota Yaris XP210 (2020-2023) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Front Radar Sensor System / Front Radar Sensor Optical Axis Misalignment Malfunction (C1A1100)

DESCRIPTION

The millimeter wave radar sensor assembly performs self-diagnosis to check for misalignment of its beam axis. If misalignment is detected, the millimeter wave radar sensor assembly stores DTC C1A1100.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

C1A1100

Front Radar Sensor Optical Axis Misalignment Malfunction

When the ignition switch is ON, the millimeter wave radar sensor assembly detects beam axis misalignment

  • Millimeter wave radar sensor assembly beam axis adjustment
  • 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 and a DTC may be stored.
  • When the millimeter wave radar sensor assembly has been replaced with a new one, it is necessary to perform millimeter wave radar sensor assembly beam axis alignment and to clear the vehicle control history. Before performing the Driving Adjustment, make sure to read Before Starting Driving Adjustment.

    HINT:

    Beam axis alignment of the millimeter wave radar sensor assembly can be performed using either Triangle Target, Flat Surface Target or Driving Adjustment.

    Triangle Target: Click here

    Flat Surface Target: Click here

    Driving Adjustment: Click here

PROCEDURE

1.

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

HINT:

Beam axis alignment of the millimeter wave radar sensor assembly can be performed using either Triangle Target, Flat Surface Target or Driving Adjustment.

Triangle Target: Click here

Flat Surface Target: Click here

Driving Adjustment: Click here

NEXT

2.

CHECK FOR DTCs

(a) Check for DTCs.

Body Electrical > Front Radar Sensor > Trouble Codes

Result

Proceed to

DTC C1A1100 is not output

A

DTC C1A1100 is output

B

A

END

B

REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY

    Diagnostic Trouble Code Chart

    D..

    Vehicle Control History

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