Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJSV
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: PRE-COLLISION: PRE-COLLISION SYSTEM: B2015,B2016,B2020,B2021,B2025-B2027,B2030-B2032,B2035,B2040,B2041,B2043,B2047; Open in Right Side Upper MOS; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

DTC

B2015

Open in Right Side Upper MOS

DTC

B2016

Open in Right Side Lower MOS

DTC

B2020

Open in Left Side Upper MOS

DTC

B2021

Open in Left Side Lower MOS

DTC

B2025

Right Side Current Detection Circuit Malfunction Hi

DTC

B2026

Right Side Current Detection Circuit Malfunction Lo

DTC

B2027

Right Side Over-Current Malfunction

DTC

B2030

Left Side Current Detection Circuit Malfunction Hi

DTC

B2031

Left Side Current Detection Circuit Malfunction Lo

DTC

B2032

Left Side Over-Current Malfunction

DTC

B2035

Power Supply Relay Adherence Malfunction

DTC

B2040

EEPROM Malfunction

DTC

B2041

Fall of Raised Voltage

DTC

B2043

Fall of B+ Voltage

DTC

B2047

Seat Belt Control ECU Inner Circuit Malfunction

DESCRIPTION

The DTCs above are stored during seat belt control ECU self diagnosis.

HINT:

  • When DTC B2015 or B2016 is detected, DTCs B2026 and B2027 will not be detected.
  • When DTC B2020 or B2021 is detected, DTCs B2031 and B2032 will not be detected.

DTC No.

DTC Detection Condition

Trouble Area

B2015

While initial check is running and the ignition switch to ON, the seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2016

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2020

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2021

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2025

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2026

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2027

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2030

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2031

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2032

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2035

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2040

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2041

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2043

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

B2047

While initial check is running and ignition switch to ON, seat belt control ECU detects an internal malfunction for 1 second.
  • Seat belt control ECU

PROCEDURE

1.

CHECK FOR DTC

(a) Using the Techstream, enter the following menus: Body Electrical / Pre-Collision / 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) Turn the ignition switch off.

(d) Turn the ignition switch to ON.

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

OK:

DTCs are 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 SEAT BELT CONTROL ECU