Toyota Yaris: 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 |
|
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
|
| 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 |
Vehicle Control History
VEHICLE CONTROL HISTORY NOTICE: Vehicle control history may be recorded due to the replacement or repair of related parts. CHECK VEHICLE CONTROL HISTORY (FRONT RADAR SENSOR SYSTEM) (a) According to the display on the GTS, check the vehicle control history...
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Supplemental Restraint System (SRS) Precautions
The front and side supplemental restraint systems (SRS) include different types of air bags. Please verify the different types of air bags which are equipped on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators are visible in the area where the air bags are installed.
The air bags are installed in the following locations:
The steering wheel hub (driver air bag) The front passenger dashboard (front passenger air bag) The outboard sides of the front seatbacks (side air bags) The front and rear window pillars, and the roof edge along both sides (curtain air bags)