Park Assist Monitoring. Dtc C1Aec Front Sensor Communication Malfunction

Audio Visual Telematics. Land Cruiser. Urj200, 202 Grj200 Vdj200

Park Assist Monitoring. Land Cruiser. Urj200, 202 Grj200 Vdj200

CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR LH] - CLEARANCE WARNING ECU ASSEMBLY)

CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR LH] - NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR RH])

INSPECT NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR RH)

INSPECT NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH)

REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR RH)

CHECK FOR DTC (C1AEC)

REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH)

CHECK FOR DTC (C1AEC)

DTC 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 Code	DTC Detection Condition	Trouble Area
C1AEC	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).	No. 1 ultrasonic sensor (front side) Harness or connector Clearance warning ECU assembly

WIRING DIAGRAM

Land Cruiser. Urj200, 202 Grj200 Vdj200.Park Assist Monitoring.Toyota Parking Assist-Sensor System.
Dtc
C1Aec Front Sensor Communication Malfunction

INSPECTION PROCEDURE

NOTICE:

If DTCs are output after repairs, turn the engine switch on (IG) and turn the TOYOTA parking assist-sensor system on. Then clear the DTCs (Click here).

1.CHECK FOR DTC

Clear the DTCs (Click here).

Check for DTCs (Click here).
Result
Result
Proceed to
No DTC is output.
A
DTC C1AEC is output.
B

Result
Result	Proceed to
No DTC is output.	A
DTC C1AEC is output.	B

Go to step 2

USE SIMULATION METHOD TO CHECK (Click here)

2.CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR LH] - CLEARANCE WARNING ECU ASSEMBLY)

Disconnect the B10 No. 1 ultrasonic sensor (front corner sensor LH) connector.

Disconnect the F92 clearance warning ECU assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
F92-4 (BOF) - B10-1 (BI)	Always	Below 1 Ω
F92-8 (SOF) - B10-3 (SI)	Always	Below 1 Ω
F92-6 (E5) - B10-5 (EI)	Always	Below 1 Ω
F92-4 (BOF) - Body ground	Always	10 kΩ or higher
F92-8 (SOF) - Body ground	Always	10 kΩ or higher
F92-6 (E5) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.CHECK HARNESS AND CONNECTOR (NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR LH] - NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR RH])

Disconnect the B10 No. 1 ultrasonic sensor (front corner sensor LH) connector.

Disconnect the B9 No. 1 ultrasonic sensor (front corner sensor RH) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
B10-2 (BO) - B9-1 (BI)	Always	Below 1 Ω
B10-4 (SO) - B9-3 (SI)	Always	Below 1 Ω
B10-6 (EO) - B9-5 (EI)	Always	Below 1 Ω
B10-2 (BO) - Body ground	Always	10 kΩ or higher
B10-4 (SO) - Body ground	Always	10 kΩ or higher
B10-6 (EO) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.INSPECT NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR RH)

Remove the No. 1 ultrasonic sensor (front corner sensor RH) (Click here).

Inspect the No. 1 ultrasonic sensor (front corner sensor RH) (Click here).

REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR RH) (Click here)

OK

5.INSPECT NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH)

Remove the No. 1 ultrasonic sensor (front corner sensor LH) (Click here).

Inspect the No. 1 ultrasonic sensor (front corner sensor LH) (Click here).

REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH) (Click here)

OK

6.REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR RH)

Replace the No. 1 ultrasonic sensor (front corner sensor RH) with a normally functioning sensor (Click here).

NEXT

7.CHECK FOR DTC (C1AEC)

Clear the DTCs (Click here).

Check for DTCs (Click here).
Result
Result
Proceed to
DTC C1AEC is output.
A
No DTC is output.
B

Result
Result	Proceed to
DTC C1AEC is output.	A
No DTC is output.	B

END (NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR RH] IS DEFECTIVE)

A

8.REPLACE NO. 1 ULTRASONIC SENSOR (FRONT CORNER SENSOR LH)

Replace the No. 1 ultrasonic sensor (front corner sensor LH) with a normally functioning sensor (Click here).

NEXT

9.CHECK FOR DTC (C1AEC)

Clear the DTCs (Click here).

Check for DTCs (Click here).
Result
Result
Proceed to
DTC C1AEC is output.
A
No DTC is output.
B

Result
Result	Proceed to
DTC C1AEC is output.	A
No DTC is output.	B

END (NO. 1 ULTRASONIC SENSOR [FRONT CORNER SENSOR LH] IS DEFECTIVE)

REPLACE CLEARANCE WARNING ECU ASSEMBLY (Click here)