DTC Code | DTC Name |
---|---|
C1AEC | Front Sensor Communication Malfunction |
DESCRIPTION
This DTC is stored when there is an open or short circuit in the communication line between the front sensors and the ECU, or when there is a malfunction in a front sensor.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
---|---|---|---|
C1AEC | Front Sensor Communication Malfunction | An open or short circuit in the communication line between the front sensors and ECU or a malfunction in a front sensor during initialization mode after the engine switch is turned on (IG). |
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WIRING DIAGRAM
*a | Front Corner Ultrasonic Sensor LH |
*b | Front Corner Ultrasonic Sensor RH |
*c | Clearance Warning ECU Assembly |
PROCEDURE
CLEARANCE SONAR SYSTEM REGISTRATION
Perform clearance sonar system registration.
Result | ||
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|
NEXT |
CHECK DTC OUTPUT (C1AEC)
Check for DTCs.
Clear the DTCs.
Recheck for DTCs.
Result | ||||||
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|
B |
USE SIMULATION METHOD TO CHECK Click here |
A |
CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - FRONT CORNER ULTRASONIC SENSOR RH)
Disconnect the R39 clearance warning ECU assembly connector.
Disconnect the B2 front corner ultrasonic sensor RH connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Result | |||
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NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
CHECK HARNESS AND CONNECTOR (FRONT CORNER ULTRASONIC SENSOR RH - FRONT CORNER ULTRASONIC SENSOR LH)
Disconnect the B6 front corner ultrasonic sensor LH connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Result | |||
---|---|---|---|
|
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
OK |
INSPECT ULTRASONIC SENSOR FRONT CORNER
*a | Component without harness connected (Front Corner Ultrasonic Sensor RH) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
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Result | |||
---|---|---|---|
|
NG |
REPLACE FRONT CORNER ULTRASONIC SENSOR RH Click here |
OK |
INSPECT FRONT CORNER ULTRASONIC SENSOR LH
*a | Component without harness connected (Front Corner Ultrasonic Sensor LH) |
Measure the resistance according to the value(s) in the table below.
Standard Resistance | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Result | |||
---|---|---|---|
|
NG |
REPLACE FRONT CORNER ULTRASONIC SENSOR LH Click here |
OK |
REPLACE FRONT CORNER ULTRASONIC SENSOR LH
Result | ||
---|---|---|
|
Replace the front corner ultrasonic sensor LH with a known good one.
Tech Tips
All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (C1AEC)
Clear the DTCs.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
B |
END (FRONT CORNER ULTRASONIC SENSOR LH WAS DEFECTIVE) |
A |
REPLACE FRONT CORNER ULTRASONIC SENSOR RH
Result | ||
---|---|---|
|
Replace the front corner ultrasonic sensor RH with a known good one.
Tech Tips
All of the sensors are interchangeable. To confirm whether a sensor is functioning normally, switch it with a known good sensor from the other end of the vehicle.
Result | ||
---|---|---|
|
NEXT |
CHECK DTC OUTPUT (C1AEC)
Clear the DTCs.
Check for DTCs.
Result | ||||||
---|---|---|---|---|---|---|
|
A |
REPLACE CLEARANCE WARNING ECU ASSEMBLY Click here |
B |
END (Front Corner Ultrasonic Sensor LH WAS DEFECTIVE) |