Toyota Yaris: Window Defogger System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Vehicle Exterior / Window / Glass / Window Defogger System / Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK 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) Connect 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 → ON

Below 1 V → 11 to 14 V

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

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

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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

4E-43 - Body ground

Rear window defogger signal (output)

Rear window defogger switch off

Below 1 V

Rear window defogger switch on

11 to 14 V

AIR CONDITIONING AMPLIFIER ASSEMBLY

(a) Disconnect the H24 air conditioning amplifier assembly connector.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

H24-5 (B) - H24-17 (GND)

Power source

Ignition switch off

11 to 14 V

H24-6 (IG+) - H24-17 (GND)

Power source (IG)

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

H24-17 (GND) - Body ground

Ground

Always

Below 1 Ω

(c) Connect the H24 air conditioning amplifier assembly connectors.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

H24-1 (CANL) - Body ground

CAN communication line

Ignition switch ON

Pulse generation

H24-2 (CANH) - Body ground

CAN communication line

Ignition switch ON

Pulse generation

H24-7 (LIN1) - Body ground

LIN communication line

Ignition switch ON

Pulse generation

    Problem Symptoms Table

    PROBLEM SYMPTOMS TABLE HINT: Inspect the fuses and relays related to this system before inspecting the suspected areas below. Use the table below to help determine the cause of problem symptoms...

    Diagnosis System

    DIAGNOSIS SYSTEM CHECK DLC3 (a) Check the DLC3. Click here INSPECT AUXILIARY BATTERY VOLTAGE (a) Measure the auxiliary battery voltage with ignition switch off...

    Other information:

    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Components


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    Toyota Yaris XP210 (2020-2022) Reapir and Service Manual: Operation Check


    OPERATION CHECK CHECK WINDOW LOCK FUNCTION HINT: Before performing the window lock switch operation check, make sure that the window lock switch is off (the switch is not pushed in). (a) Turn the window lock switch of the multiplex network master switch assembly on (pushed in) and check that the front passenger window (w/ Rear Power Window) are disabled...

    Categories

    Refueling

    Before refueling, close all the doors, windows, and the liftgate/trunk lid, and switch the ignition OFF.

    To open the fuel-filler lid, pull the remote fuel-filler lid release.

    Toyota Yaris. Refueling

    To remove the fuel-filler cap, turn it counterclockwise. Attach the removed cap to the inner side of the fuel-filler lid.

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