Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM100000001QOQV
Model Year Start: 2021 Model: RAV4 Prod Date Range: [08/2020 - 10/2022]
Title: SEAT BELT: SEAT BELT WARNING SYSTEM: TERMINALS OF ECU; 2021 - 2022 MY RAV4 RAV4 HV [08/2020 - 10/2022]

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (w/ Rear Seat Belt Warning System)

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

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

Click here 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

(b) Reconnect the instrument panel junction block assembly connectors.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A-32 (IG) - Body ground

None - Body ground

Ignition power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

A-31 (BECU) - Body ground

None - Body ground

Auxiliary Battery power supply

Ignition switch off

11 to 14 V

A-30 (ACC) - Body ground

None - Body ground

ACC power supply

Ignition switch ACC

11 to 14 V

Ignition switch off

Below 1 V

A-11 (GND1) - Body ground

None - Body ground

Ground

Always

Below 1 Ω

(d) Install the main body ECU (multiplex network body ECU).

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: INSTALLATION

(e) Measure the voltage and pulse according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

4H-24 (LCTY) - Body ground

G - Body ground

Rear door courtesy light switch assembly LH input

Rear door LH open

Below 1 V

Rear door LH closed

4.7 to 5.3 V

4A-31 (RCTY) - Body ground

LA-V - Body ground

Rear door courtesy light switch assembly RH input

Rear door RH open

Below 1 V

Rear door RH closed

4.7 to 5.3 V

CHECK COMBINATION METER ASSEMBLY

(a) Disconnect the G18 and G19 combination meter assembly connectors.

(b) Measure the resistance and voltage according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

*1: w/o Stop and Start System

*2: w/ Stop and Start System

*3: w/ Rear Seat Belt Warning System

G18-22 (B) - Body ground

B - Body ground

Auxiliary Battery power supply

Ignition switch off

11 to 14 V

G18-38 (IG+) - Body ground

L - Body ground

Ignition power supply (IG signal)

Ignition switch ON

11 to 14 V*1

10.5 to 16 V*2

Ignition switch off

Below 1 V

G18-23 (ES) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G19-36 (RLSB) - Body ground*3

SB - Body ground

Rear LH seat belt buckle switch signal

Rear LH seat belt fastened

10 kΩ or higher

Rear LH seat belt unfastened

Below 1 Ω

G19-19 (RCSB) - Body ground*3

B - Body ground

Rear center seat belt buckle switch signal

Rear center seat belt fastened

10 kΩ or higher

Rear center seat belt fastened

Below 1 Ω

G19-35 (RRSB) - Body ground*3

LG - Body ground

Rear RH seat belt buckle switch signal

Rear RH seat belt fastened

10 kΩ or higher

Rear RH seat belt unfastened

Below 1 Ω

CHECK AIRBAG ECU ASSEMBLY

Click here 2021 - 2024 MY RAV4 RAV4 HV [08/2020 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: TERMINALS OF ECU

CHECK OCCUPANT DETECTION ECU

Click here 2019 - 2024 MY RAV4 RAV4 HV [11/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: TERMINALS OF ECU