Toyota Corolla Cross: Main Microcomputer in Front Radar Sensor System Internal Failure (C1A8C04,C1A8C46,C1A8D1C,C1A9000)
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 |
|---|---|---|---|---|
|
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 |
|
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 |
|
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 |
|
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 |
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
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Flat Surface Target: Click here
Driving Adjustment: Click here
PROCEDURE
|
1. |
REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY |
Click here
| NEXT | .gif)
|
END |
READ NEXT:
Lost Communication with Cruise Control Module Missing Message (U010487)
DESCRIPTION
The millimeter wave radar sensor assembly communicates with
the forward recognition camera via CAN communication.
If a communication error is detected between the forward recognition
Software Incompatibility with Image Processing Module "A" Not Programmed (U130C51,U130C57)
DESCRIPTION
The millimeter wave radar sensor assembly receives the vehicle information
from the forward recognition camera via CAN communication line. When the
millimeter wave radar sensor
SEE MORE:
How To Proceed With Troubleshooting
PROCEDURE
1. VEHICLE BROUGHT TO WORKSHOP
NEXT
2. CUSTOMER PROBLEM ANALYSIS
HINT: If the malfunction is not reproduced, perform a simulation test.
Click here
For the simulation test, reproduce the driving conditions that wer
Inspection
INSPECTION PROCEDURE 1. INSPECT REAR LIGHT LENS AND BODY LH (for LED Type Clearance Light)
(a) Check that the rear light lens and body LH.
(1) Apply auxiliary battery voltage to the rear light lens and body LH and check that the light comes on.
OK:
Tester Connection Specified Condit
