| Last Modified: 05-13-2024 | 6.11:8.1.0 | Doc ID: RM1000000027Y55 |
| Model Year Start: 2023 | Model: GR Corolla | Prod Date Range: [11/2022 - ] |
| Title: ADVANCED DRIVER ASSISTANCE SYSTEM: FRONT RADAR SENSOR SYSTEM: C1A8C04,...,C1A9000; Main Microcomputer in Front Radar Sensor System Internal Failure; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ] | ||
|
DTC |
C1A8C04 |
Main Microcomputer in Front Radar Sensor System Internal Failure |
|
DTC |
C1A8C46 |
Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure |
|
DTC |
C1A8D1C |
Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range |
|
DTC |
C1A9000 |
Malfunction of Millimeter-wave Circuit in Front Radar Sensor |
DESCRIPTION
When an internal malfunction is detected in the millimeter wave radar sensor assembly, a DTC is stored.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
DTC Output from |
Priority |
|---|---|---|---|---|---|
|
C1A8C04 |
Main Microcomputer in Front Radar Sensor System Internal Failure |
When the ignition switch is ON, a millimeter wave radar sensor assembly internal malfunction is detected |
Millimeter wave radar sensor assembly |
Front Radar Sensor |
A |
|
C1A8C46 |
Main Microcomputer in Front Radar Sensor Calibration/Parameter Memory Failure |
When the ignition switch is ON, the millimeter wave radar sensor assembly detects an internal memory malfunction |
Millimeter wave radar sensor assembly |
Front Radar Sensor |
A |
|
C1A8D1C |
Power Supply Circuit in Front Radar Sensor Circuit Voltage Out of Range |
When the ignition switch is ON, the millimeter wave radar sensor assembly detects a power source circuit malfunction |
Millimeter wave radar sensor assembly |
Front Radar Sensor |
A |
|
C1A9000 |
Malfunction of Millimeter-wave Circuit in Front Radar Sensor |
When the ignition switch is ON, the millimeter wave radar sensor assembly detects an internal millimeter wave circuit malfunction |
Millimeter wave radar sensor assembly |
Front Radar Sensor |
A |
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
![2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 - ]; ADVANCED DRIVER ASSISTANCE SYSTEM: MILLIMETER WAVE RADAR SENSOR: TARGET ADJUSTMENT(TRIANGLE TARGET)](/t3Portal/stylegraphics/info.gif)
Flat Surface Target: Click here
Driving Adjustment: Click here
PROCEDURE
|
1. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
HINT:
Click here
| NEXT |
|
END |
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