Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJA2
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 -           ]
Title: PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: C1AE1; Front Left Sensor Malfunction; 2016 - 2020 MY Sienna [12/2015 -        ]

DTC

C1AE1

Front Left Sensor Malfunction

DESCRIPTION

The No. 1 ultrasonic sensor (front left sensor) is installed on the front bumper. The ECU detects obstacles based on signals received from the No. 1 ultrasonic sensor (front left sensor). If the No. 1 ultrasonic sensor (front left sensor) has an open or other malfunction, it will not function normally.

DTC Code

DTC Detection Condition

Trouble Area

C1AE1

A malfunction of the No. 1 ultrasonic sensor (front left sensor).

  • No. 1 ultrasonic sensor (front left sensor)
  • Clearance warning ECU

CAUTION / NOTICE / HINT

NOTICE:

If the DTC is output after repairs, turn the ignition switch to ON and move the shift lever to R. Then clear the DTC.

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: DTC CHECK / CLEAR ).

(b) Check for DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC C1AE1 is output

A

No DTC is output

B

B

USE SIMULATION METHOD TO CHECK

(See page 2016 MY Sienna [12/2015 - 08/2016]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING 2018 - 2020 MY Sienna [11/2017 -        ]; INTRODUCTION: HOW TO TROUBLESHOOT ECU CONTROLLED SYSTEMS: HOW TO PROCEED WITH TROUBLESHOOTING )

A

2.

REPLACE NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR)

(a) Replace the No. 1 ultrasonic sensor (front left sensor) with a normally functioning sensor (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR(for Front Side): REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; PARK ASSIST / MONITORING: ULTRASONIC SENSOR(for Front Side): REMOVAL ).

NEXT

3.

CHECK DTC OUTPUT

(a) Clear the DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: DTC CHECK / CLEAR ).

(b) Check for DTCs (See page 2016 - 2020 MY Sienna [12/2015 -        ]; PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: DTC CHECK / CLEAR ).

Result

Result

Proceed to

DTC C1AE1 is output

A

No DTC is output

B

A

REPLACE CLEARANCE WARNING ECU

(See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PARK ASSIST / MONITORING: CLEARANCE WARNING ECU: REMOVAL 2018 - 2020 MY Sienna [11/2017 -        ]; PARK ASSIST / MONITORING: CLEARANCE WARNING ECU: REMOVAL )

B

END (NO. 1 ULTRASONIC SENSOR (FRONT LEFT SENSOR) IS DEFECTIVE)