DESCRIPTION
If the millimeter wave radar sensor assembly receives a yaw rate sensor malfunction
signal from the yaw rate sensor (airbag sensor assembly) or yaw rate sensor zero
point malfunction signal from the skid control ECU (brake actuator assembly), DTC
C1A46 will be stored.
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DTC No.
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Detection Item
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DTC Detection Condition
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Trouble Area
|
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C1A46
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Yaw Rate Sensor
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- While the vehicle is being driven at a speed of 5 km/h (4 mph) or
more, the millimeter wave radar sensor assembly receives a yaw rate
sensor malfunction signal from the yaw rate sensor for approximately
10 seconds.
- While the vehicle is being driven at a speed of 5 km/h (4 mph) or
more, the millimeter wave radar sensor assembly receives a yaw rate
sensor zero point malfunction signal from the skid control ECU (brake
actuator assembly) for approximately 10 seconds.
|
- Vehicle stability control system
- Millimeter wave radar sensor assembly
- Yaw rate sensor (Airbag sensor assembly)
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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. As a result,
a DTC may be stored.
- If the millimeter wave radar sensor assembly has been replaced, be sure
to perform millimeter wave radar sensor assembly adjustment.
Click here 
- The pre-collision system uses the CAN communication system. First, confirm
that there are no malfunctions in the CAN communication system. Refer to How
to Proceed with Troubleshooting.
Click here
PROCEDURE
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1.
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CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM)
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HINT:
Pre-collision system DTC C1A46 may be stored due to a malfunction in the vehicle
stability control system. Therefore, it is necessary to check for and troubleshoot
vehicle stability control system DTCs first.
(a) Check for DTCs.
Click here
|
Result
|
Proceed to
|
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Vehicle stability control system DTCs are not output
|
A
|
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Vehicle stability control system DTCs are output
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B
|
| B |
 |
GO TO VEHICLE STABILITY CONTROL SYSTEM
|
| A |
|
|
|
2.
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CHECK FOR DTCs (PRE-COLLISION SYSTEM)
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(a) Clear the DTCs.
Click here
(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.
Click here
|
Result
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Proceed to
|
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DTC C1A46 is not output
|
A
|
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DTC C1A46 is output
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B
|
| A |
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USE SIMULATION METHOD TO CHECK
|
| B |
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REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY
|
|
