Toyota Yaris: Power Door Lock Control System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2026) Reapir and Service Manual / Vehicle Interior / Door Lock / Power Door Lock Control System / Terminals Of Ecu

TERMINALS OF ECU

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

Power Distribution Box Assembly

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.

HINT:

Measure the values on the wire harness side with the connectors connected.

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
MB-13 (GND1) - Body ground	Ground	Always	Below 1 Ω
MB-14 (GND2) - Body ground	Ground	Always	Below 1 Ω
MB-26 (BECU) - Body ground	Auxiliary battery power supply	Always	11 to 14 V
MB-27 (IGR) - Body ground	IG power supply	Ignition switch ON	11 to 14 V

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

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(e) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
4E-5 (FRCY) - Body ground	Front door courtesy light switch (for RH) input	Front door RH open	Below 1 V
4E-5 (FRCY) - Body ground	Front door courtesy light switch (for RH) input	Front door RH closed	11 to 14 V
4E-3 (FLCY) - Body ground	Front door courtesy light switch (for LH) input	Front door LH open	Below 1 V
4E-3 (FLCY) - Body ground	Front door courtesy light switch (for LH) input	Front door LH closed	11 to 14 V
4E-2 (BCTY) - Body ground	Back door courtesy light switch input	Back door closed	Below 1 V
4E-2 (BCTY) - Body ground	Back door courtesy light switch input	Back door open	11 to 14 V
4E-39 (TR+) - Body ground	Back door lock motor drive output	Back door closed → open	Below 1 V → 11 to 14 V → Below 1 V
4C-36 (ACT-) - Body ground	Door lock motor unlock drive output	Door control switch or driver door key cylinder off → on (unlock)	Below 1 V → 11 to 14 V → Below 1 V
4B-34 (ACT+) - Body ground	Door lock motor lock drive output	Door control switch or driver door key cylinder off → on (lock)	Below 1 V → 11 to 14 V → Below 1 V
4B-19 (ACT+) - Body ground	Door lock motor lock drive output		Below 1 V → 11 to 14 V → Below 1 V
H4-3 (LSFR) - Body ground	Front door RH unlock detection switch input	Front door RH unlocked	Below 1 V
H4-3 (LSFR) - Body ground	Front door RH unlock detection switch input	Front door RH locked	Pulse generation
H4-9 (LSFL) - Body ground	Front door LH unlock detection switch input	Front door LH unlocked	Below 1 V
H4-9 (LSFL) - Body ground	Front door LH unlock detection switch input	Front door LH locked	Pulse generation
H4-28 (L2) - Body ground	Driver door key-linked lock input	Driver door key cylinder turned to lock	Below 1 V
H4-28 (L2) - Body ground	Driver door key-linked lock input	Driver door key cylinder not turned	Pulse generation
H4-4 (UL3) - Body ground	Driver door key-linked unlock input	Driver door key cylinder turned to unlock	Below 1 V
H4-4 (UL3) - Body ground	Driver door key-linked unlock input	Driver door key cylinder not turned	Pulse generation

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the H46 certification ECU (smart key ECU assembly) connector.

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

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition
H46-6 (+B) - Body ground	Ground	Always	Below 1 Ω
H46-29 (E) - Body ground	Auxiliary battery power supply	Always	11 to 14 V

(d) Measure the voltage and check for pulses according to the value(s) in the table below.

Tester Connection	Terminal Description	Condition	Specified Condition
O47-16 (TSW5) - Body ground	Back door opener switch input	Back door opener switch assembly (open switch) off → on	Below 1 V → Pulse generation

Problem Symptoms Table

PROBLEM SYMPTOMS TABLE NOTICE: If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration. Click here HINT: Use the table below to help determine the cause of problem symptoms...

Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST HINT: Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts...

Other information:

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