Toyota Yaris: Seat Belt Warning System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Interior / Seat Belt / Seat Belt Warning System / Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY

*1

Power Distribution Box Assembly

*2

Main Body ECU (Multiplex Network Body ECU)

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here

(b) Reconnect the power distribution box assembly connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

MB-26 (BECU) - Body ground

Auxiliary battery power supply

Ignition switch off

11 to 14 V

MB-27 (IGR) - Body ground

Ignition power supply (IG signal)

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

(d) Install the main body ECU (multiplex network body ECU) to the power distribution box assembly.

Click here

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

4E-3 - Body ground

Front door courtesy light switch LH signal

Front door LH open

11 to 14 V

Front door LH closed

Below 1 V

4E-5 - Body ground

Front door courtesy light switch RH signal

Front door RH open

11 to 14 V

Front door RH closed

Below 1 V

4E-8 - Body ground

Rear RH seat belt buckle switch signal

Rear RH seat belt fastened

11 to 14 V

Rear RH seat belt not fastened

Below 1 V

4E-11 - Body ground

Front passenger side seat belt buckle switch signal

Front passenger side seat belt fastened

11 to 14 V

Front passenger side seat belt not fastened

Below 1 V

4E-19 - Body ground

Rear LH seat belt buckle switch signal

Rear LH seat belt fastened

11 to 14 V

Rear LH seat belt not fastened

Below 1 V

4E-29 - Body ground

Passenger seat occupant detection sensor signal

Ignition switch ON, front passenger seat occupied

Below 1 V

Ignition switch ON, front passenger seat not occupied

11 to 14 V

CHECK COMBINATION METER ASSEMBLY

(a) Disconnect the H6 combination meter assembly connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

H6-22 (B) - Body ground

Auxiliary battery power supply

Ignition switch off

11 to 14 V

H6-38 (IG+) - Body ground

Ignition power supply (IG signal)

Ignition switch off

Below 1 Ω

Ignition switch ON

10.5 to 16 V

H6-23 (ES) - Body ground

Ground

Always

Below 1 Ω

(c) Connect the H7 combination meter assembly connectors.

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

HINT:

Measure the values on the wire harness side with the connector disconnected.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

H7-34 (BKL) - Body ground

Driver seat belt buckle switch signal

Driver seat belt fastened

10 kΩ or higher

Driver seat belt unfastened

Below 1 Ω

    Data List / Active Test

    DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not...

    On-vehicle Inspection

    ON-VEHICLE INSPECTION PROCEDURE 1. INSPECT DRIVER SEAT BELT WARNING LIGHT HINT: The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat...

    Other information:

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Disassembly


    DISASSEMBLY CAUTION / NOTICE / HINT NOTICE: When removing and installing the combination meter glass, make sure not to touch the display panel. Do not allow any dirt (fingerprints, grease, etc.) to adhere to the combination meter glass. If the glass is dirty, wipe it clean with a soft cloth...

    Toyota Yaris XP210 (2020-2024) Owner's Manual: Tire Pressure Monitoring System (If equipped)


    The Tire Pressure Monitoring System (TPMS) monitors the air pressure of all four tires. If the air pressure of one or more tires is too low, the system warns the driver by indicating the tire pressure monitoring system warning light in the combination meter and operating a beep sound...

    Categories

    Turning the Engine Off

    Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.

    Automatic transaxle: Shift the selector lever to the P position and set the parking brake.

    Press the push button start to turn off the engine. The ignition position is off.

    read more

     
    Copyright © 2024 www.toyaris4.com