Toyota Venza manuals

Toyota Venza: Rear Sensor Communication Malfunction (C1AED)

Toyota Venza Service Manual / Park Assist / Monitoring / Intuitive Parking Assist System / Rear Sensor Communication Malfunction (C1AED)

DESCRIPTION

This DTC is stored when there is an open or short circuit in the communication line between the rear sensors and the ECU, or when there is a malfunction in a rear sensor.

DTC No.

DTC Detection Condition

Trouble Area

C1AED

An open or short circuit in the communication line between the rear sensors and ECU or a malfunction in a rear sensor during initialization mode after the engine switch is turned on (IG).

  • Rear ultrasonic sensor circuit
  • Clearance warning ECU assembly

WIRING DIAGRAM


PROCEDURE

1.

CHECK DTC OUTPUT (C1AED)

(a) Check for DTCs (See page ).


(b) Clear the DTCs (See page ).


(c) Recheck for DTCs (See page ).


Result

Proceed to

DTC C1AED is output

A

No DTCs are output

B


B

USE SIMULATION METHOD TO CHECK


A

2.

CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSEMBLY - REAR LEFT SENSOR)

(a) Disconnect the D79 clearance warning ECU assembly connector.

(b) Disconnect the Q1 No. 1 ultrasonic sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D79-22 (BOR) - Q1-1 (BI)

Always

Below 1 Ω

D79-24 (SOR) - Q1-3 (SI)

Always

Below 1 Ω

D79-23 (E1) - Q1-5 (EI)

Always

Below 1 Ω

D79-22 (BOR) - Body ground

Always

10 kΩ or higher

D79-24 (SOR) - Body ground

Always

10 kΩ or higher

D79-23 (E1) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

3.

CHECK HARNESS AND CONNECTOR (REAR LEFT SENSOR - REAR LEFT CENTER SENSOR)

(a) Disconnect the Q2 No. 1 ultrasonic sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Q1-2 (BO) - Q2-1 (BI)

Always

Below 1 Ω

Q1-4 (SO) - Q2-3 (SI)

Always

Below 1 Ω

Q1-6 (EO) - Q2-5 (EI)

Always

Below 1 Ω

Q1-2 (BO) - Body ground

Always

10 kΩ or higher

Q1-4 (SO) - Body ground

Always

10 kΩ or higher

Q1-6 (EO) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

4.

CHECK HARNESS AND CONNECTOR (REAR LEFT CENTER SENSOR - REAR RIGHT CENTER SENSOR)

(a) Disconnect the Q3 No. 1 ultrasonic sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Q2-2 (BO) - Q3-1 (BI)

Always

Below 1 Ω

Q2-4 (SO) - Q3-3 (SI)

Always

Below 1 Ω

Q2-6 (EO) - Q3-5 (EI)

Always

Below 1 Ω

Q2-2 (BO) - Body ground

Always

10 kΩ or higher

Q2-4 (SO) - Body ground

Always

10 kΩ or higher

Q2-6 (EO) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

5.

CHECK HARNESS AND CONNECTOR (REAR RIGHT CENTER SENSOR - REAR RIGHT SENSOR)

(a) Disconnect the Q4 No. 1 ultrasonic sensor connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

Q3-2 (BO) - Q4-1 (BI)

Always

Below 1 Ω

Q3-4 (SO) - Q4-3 (SI)

Always

Below 1 Ω

Q3-6 (EO) - Q4-5 (EI)

Always

Below 1 Ω

Q3-2 (BO) - Body ground

Always

10 kΩ or higher

Q3-4 (SO) - Body ground

Always

10 kΩ or higher

Q3-6 (EO) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

6.

INSPECT NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (BI) - 5 (EI)

Always

10 kΩ or higher

1 (BI) - 2 (BO)

Always

10 kΩ or higher

3 (SI) - 4 (SO)

Always

Below 1 Ω

5 (EI) - 6 (EO)

Always

Below 1 Ω

Text in Illustration

*a

Component without harness connected

(No. 1 Ultrasonic Sensor (Rear Left Sensor))



NG

REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR)


OK

7.

INSPECT NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (BI) - 5 (EI)

Always

10 kΩ or higher

1 (BI) - 2 (BO)

Always

10 kΩ or higher

3 (SI) - 4 (SO)

Always

Below 1 Ω

5 (EI) - 6 (EO)

Always

Below 1 Ω

Text in Illustration

*a

Component without harness connected

(No. 1 Ultrasonic Sensor (Rear Left Center Sensor))



NG

REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR)


OK

8.

INSPECT NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

1 (BI) - 5 (EI)

Always

10 kΩ or higher

1 (BI) - 2 (BO)

Always

10 kΩ or higher

3 (SI) - 4 (SO)

Always

Below 1 Ω

5 (EI) - 6 (EO)

Always

Below 1 Ω

Text in Illustration

*a

Component without harness connected

(No. 1 Ultrasonic Sensor (Rear Right Center Sensor))



NG

REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR)


OK

9.

REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT SENSOR)



NEXT

10.

CHECK DTC OUTPUT (C1AED)

(a) Clear the DTCs (See page ).


(b) Check for DTCs (See page ).


Result

Proceed to

DTC C1AED is output

A

No DTCs are output

B


B

END


A

11.

REPLACE NO. 1 ULTRASONIC SENSOR (REAR LEFT CENTER SENSOR)



NEXT

12.

CHECK DTC OUTPUT (C1AED)

(a) Clear the DTCs (See page ).


(b) Check for DTCs (See page ).


Result

Proceed to

DTC C1AED is output

A

No DTCs are output

B


B

END


A

13.

REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT CENTER SENSOR)



NEXT

14.

CHECK DTC OUTPUT (C1AED)

(a) Clear the DTCs (See page ).


(b) Check for DTCs (See page ).


Result

Proceed to

DTC C1AED is output

A

No DTCs are output

B


B

END


A

15.

REPLACE NO. 1 ULTRASONIC SENSOR (REAR RIGHT SENSOR)



NEXT

16.

CHECK DTC OUTPUT (C1AED)

(a) Clear the DTCs (See page ).


(b) Check for DTCs (See page ).


Result

Proceed to

DTC C1AED is output

A

No DTCs are output

B


A

REPLACE CLEARANCE WARNING ECU ASSEMBLY


B

END

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