Toyota Yaris: Power Mirror Control System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Vehicle Exterior / Mirror (ext) / Power Mirror Control 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.

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(b) Reconnect the power distribution box assembly connectors.

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

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 off

Below 1 V

Ignition switch ON

11 to 14 V

MB-13 (GND1) - Body ground

Body Ground

Always

Below 1 Ω

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

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

H5-26 (AMR) - Body ground

Power retract mirror motor drive voltage (Input)

Auto retractable outer mirror switch on outer mirror switch assembly auto retracted position.

Below 1 V

Auto retractable outer mirror switch on outer mirror switch assembly return position.

11 to 14 V

H5-27 (RET) - Body ground

Power retract mirror motor drive voltage (Input)

Auto retractable outer mirror switch on outer mirror switch assembly retracted position.

Below 1 V

Auto retractable outer mirror switch on outer mirror switch assembly driving position.

11 to 14 V

4B-2 - Body ground

Mirror heater drive voltage (Output)

Ignition switch ON, rear defogger switch off.

Below 1 V

Ignition switch ON, rear defogger switch on.

11 to 14 V

4C-10 - Body ground

Power retract mirror motor drive voltage (Output)

Outer rear view mirror assembly moves to the retracted position.

Below 1 V

Outer rear view mirror assembly not move.

11 to 14 V

4C-21 - Body ground

Power retract mirror motor drive voltage (Output)

Outer rear view mirror assembly moves to the return position.

Below 1 V

Outer rear view mirror assembly not move.

11 to 14 V

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