Toyota Yaris: Power Mirror Control System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2022) 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.

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.

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.

Click here

(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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