Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001H0R8
Model Year Start: 2020 Model: GR Corolla Prod Date Range: [01/2019 - 09/2022]
Title: CRUISE CONTROL: FRONT RADAR SENSOR SYSTEM (for Gasoline Model): C1A1100; Front Radar Sensor Optical Axis Misalignment Malfunction; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022]

DTC

C1A1100

Front Radar Sensor Optical Axis Misalignment Malfunction

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 is replaced with a new one, adjustment of the millimeter wave radar sensor beam axis must be performed.

    Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

PROCEDURE

1.

ADJUST MILLIMETER WAVE RADAR SENSOR ASSEMBLY

(a) Perform millimeter wave radar sensor assembly beam axis adjustment.

Click here 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; CRUISE CONTROL: MILLIMETER WAVE RADAR SENSOR: ADJUSTMENT

NEXT

2.

CHECK FOR DTCs

(a) Clear the DTCs.

Body Electrical > Front Radar Sensor > Clear DTCs

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

HINT:

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

(c) 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