Toyota Venza Quiz
Park Assist / Monitoring

Rear Sensor Communication Malfunction (C1AED)

In this manual: Park Assist / Monitoring
Introduction — 15Maintenance — 8Audio / Video — 102Garage Door Opener — 8Navigation / Multi Info Display — 81Park Assist / Monitoring — 50Brake (front) — 7Brake (rear) — 7Brake Control / Dynamic Control Systems — 79Brake System (other) — 28Parking Brake — 22Axle And Differential — 44Drive Shaft / Propeller Shaft — 24Mf1a Transfer / 4wd / Awd — 46U660e Automatic Transmission / Transaxle — 1241ar-fe Cooling — 311ar-fe Emission Control — 101ar-fe Engine Control — 1331ar-fe Engine Mechanical — 441ar-fe Fuel — 311ar-fe Intake / Exhaust — 211ar-fe Lubrication — 111ar-fe Starting — 16Cruise Control — 241ar-fe Battery / Charging — 162gr-fe Battery / Charging — 17Networking — 67Power Distribution — 8Power Assist Systems — 34Steering Column — 37Steering Gear / Linkage — 29Alignment / Handling Diagnosis — 4Front Suspension — 39Rear Suspension — 35Tire / Wheel — 4Tire Pressure Monitoring — 35Door / Hatch — 83Exterior Panels / Trim — 56Horn — 4Lighting (ext) — 89Mirror (ext) — 36Sliding Roof / Convertible — 26Window / Glass — 87Wiper / Washer — 30Door Lock — 85Heating / Air Conditioning — 82Interior Panels / Trim — 20Lighting (int) — 37Meter / Gauge / Display — 41Mirror (int) — 9Power Outlets (int) — 10Seat — 84Seat Belt — 43Supplemental Restraint Systems — 131Theft Deterrent / Keyless Entry — 155
~6min read
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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

  1. 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

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


NEXT

  1. 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

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


NEXT

  1. 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

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


NEXT

  1. 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

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


NEXT

  1. 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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