Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001FQOC
Model Year Start: 2019 Model: RAV4 HV Prod Date Range: [11/2018 - 10/2023]
Title: DOOR / HATCH: POWER BACK DOOR SYSTEM (for HV Model): B2251; Back Door Closer Switch Malfunction; 2019 - 2023 MY RAV4 HV [11/2018 - 10/2023]

DTC

B2251

Back Door Closer Switch Malfunction

DESCRIPTION

The multiplex network door ECU receives signals from the latch switch, initial switch, pawl switch and back door courtesy switch, which are built into the back door lock with courtesy light switch assembly. Based on these switch signals, the latch position of the back door lock with courtesy light switch assembly is determined.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2251

Back Door Closer Switch Malfunction

While the back door closer is operating, a malfunction is detected in position information from the back door courtesy switch within a specified amount of time.

  • Back door lock with courtesy light switch assembly
  • Harness or connector
  • Multiplex network door ECU
  • Instrument panel junction block assembly
  • Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the replacement, removal and installation of the multiplex network door ECU or disconnection of the connectors of the multiplex network door ECU has been performed, initialize the power back door system.

    Click here 2019 - 2023 MY RAV4 HV [11/2018 - 10/2023]; DOOR / HATCH: POWER BACK DOOR SYSTEM (for HV Model): INITIALIZATION

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Read the Data List according to the display on the Techstream.

Click here 2019 - 2023 MY RAV4 HV [11/2018 - 10/2023]; DOOR / HATCH: POWER BACK DOOR SYSTEM (for HV Model): DATA LIST / ACTIVE TEST

Body Electrical > Back Door > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Courtesy SW

Back door courtesy switch signal

ON or OFF

ON: Back door open

OFF: Back door closed

-

Body Electrical > Back Door > Data List

Tester Display

Courtesy SW

OK:

The display is as specified in the normal condition column.

OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

2.

INSPECT BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY

(a) Remove the back door lock with courtesy light switch assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; DOOR LOCK: BACK DOOR LOCK: REMOVAL

(b) Inspect the back door lock with courtesy light switch assembly.

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; DOOR LOCK: BACK DOOR LOCK: INSPECTION

NG

REPLACE BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK WITH COURTESY LIGHT SWITCH ASSEMBLY - MULTIPLEX NETWORK DOOR ECU AND BODY GROUND)

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the R14 back door lock with courtesy light switch assembly connector.

(c) Disconnect the R18 multiplex network door ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R14-4 (CTY) - R18-11 (FUL)

Always

Below 1 Ω

R14-1 (E) - Body ground

Always

Below 1 Ω

R14-4 (CTY) or R18-11 (FUL) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - MULTIPLEX NETWORK DOOR ECU)

(a) Disconnect the 4H instrument panel junction block assembly connector.

(b) Disconnect the R18 multiplex network door ECU connector.

(c) Disconnect the R14 back door lock assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

4H-34 or R18-11 (FUL) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A-4 (BCTY) - 4H-34

Always

Below 1 Ω

NG

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

OK

6.

READ VALUE USING TECHSTREAM

(a) Disconnect the R18 multiplex network door ECU connector.

(b) Read the Data List according to the display on the Techstream.

Click here 2019 - 2023 MY RAV4 HV [11/2018 - 10/2023]; DOOR / HATCH: POWER BACK DOOR SYSTEM (for HV Model): DATA LIST / ACTIVE TEST

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Back Door Courtesy SW

Back door courtesy switch signal

ON or OFF

ON: Back door open

OFF: Back door closed

-

Body Electrical > Main Body > Data List

Tester Display

Back Door Courtesy SW

OK:

The display is as specified in the normal condition column.

OK

REPLACE MULTIPLEX NETWORK DOOR ECU

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2019 MY RAV4 RAV4 HV [11/2018 - 02/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2019 MY RAV4 RAV4 HV [02/2019 - 10/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 MY RAV4 RAV4 HV [10/2019 - 08/2020]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2021 MY RAV4 RAV4 HV [08/2020 - 12/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL