Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJT9
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: C1A02; Vehicle Information Not Obtained; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

C1A02

Vehicle Information Not Obtained

DESCRIPTION

When a new driving support ECU is installed, it receives vehicle specification information (destination, steering wheel position, 2WD or AWD information, etc.) from the main body ECU and ECM and memorizes the information.

DTC C1A02 is stored when the driving support ECU receives the vehicle specification information from the main body ECU but cannot record it.

DTC No.

DTC Detection Condition

Trouble Area

C1A02

Inconsistent vehicle specification information between the main body ECU and driving support ECU continues for 1 second or more.

Driving support ECU

CAUTION / NOTICE / HINT

HINT:

This circuit uses CAN communication. Therefore, be sure to check that the CAN communication system is normal before performing inspection (See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING ).

PROCEDURE

1.

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Clear the DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING ).

(b) Check for DTCs (See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING ).

OK:

CAN communication system DTC is not output.

NG

GO TO CAN COMMUNICATION SYSTEM

(See page 2016 MY Sienna [12/2015 - 08/2016]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING 2017 MY Sienna [08/2016 - 11/2017]; NETWORKING: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING )

OK

2.

CHECK FOR DTC (PRE-COLLISION 2 SYSTEM)

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.

(b) Clear the DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PRE-COLLISION: PRE-COLLISION SYSTEM: DTC CHECK / CLEAR ).

(c) Check for DTCs (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; PRE-COLLISION: PRE-COLLISION SYSTEM: DTC CHECK / CLEAR ).

OK:

DTC C1A02 is not output.

OK

CHECK FOR INTERMITTENT PROBLEMS (SYMPTOM SIMULATION)

(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 )

NG

REPLACE DRIVING SUPPORT ECU