Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Terminals Of Ecu

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Interior / Door Lock / Power Door Lock Control System(for Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

Click here

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

HINT:

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

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

G32-19 (GND2) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

-

(c) Reconnect the instrument panel junction block assembly connectors.

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

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

MB-11 (GND1) - Body ground

-

-

Ground

Always

Below 1 Ω

-

MB-30 (ACC) - Body ground

-

Input

ACC power supply

Engine switch on (ACC)

11 to 14 V

ACC SW

Engine switch off

Below 1 V

MB-31 (BECU) - Body ground

-

Input

Battery power supply

Always

11 to 14 V

-

MB-32 (IG) - Body ground

-

Input

IG power supply

Engine switch on (IG)

11 to 14 V

IG SW

Engine switch off

Below 1 V

(e) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

Click here

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

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

G33-1 (FLCY) - Body ground

W- Body ground

Input

Front door courtesy light switch (for LH) input

Front door LH open → closed

Below 1 V → 11 to 14 V

FL Door Courtesy SW

G33-6 (FRCY) - Body ground

BE - Body ground

Input

Front door courtesy light switch (for RH) input

Front door RH open → closed

Below 1 V → 11 to 14 V

FR Door Courtesy SW

4H-24 (LCTY) - Body ground

G - Body ground

Input

Rear door courtesy light switch (for LH) input

Rear door LH open → closed

Below 1 V → 11 to 14 V

RL Door Courtesy SW

4A-31 (RCTY) - Body ground

V - Body ground

Input

Rear door courtesy light switch (for RH) input

Rear door RH open → closed

Below 1 V → 11 to 14 V

RR Door Courtesy SW

4D-13 (LSFL) - Body ground

W - Body ground

Input

Front door LH unlock detection switch input

Front door LH unlocked → locked

Below 1 V → 11 to 14 V

FL Door Lock Pos SW

4D-12 (LSFR) - Body ground

GR - Body ground

Input

Front door RH unlock detection switch input

Front door RH unlocked → locked

Below 1 V → 11 to 14 V

FR Door Lock Pos SW

4D-14 (LSWL) - Body ground

GR - Body ground

Input

Rear door LH unlock detection switch input

Rear door LH unlocked → locked

Below 1 V → 11 to 14 V

RL-Door Lock Pos SW

G32-20 (LSWR) - Body ground

L - Body ground

Input

Rear door RH unlock detection switch input

Rear door RH unlocked → locked

Below 1 V → 11 to 14 V

RR-Door Lock Pos SW

4H-8 (ACT-) - Body ground

LA-R - Body ground

Output

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

-

4H-9 (ACT-) - Body ground

R - Body ground

Output

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

-

4H-6 (ACT+) - Body ground

LA-B - Body ground

Output

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

-

4H-18 (ACT+) - Body ground

LA-B - Body ground

Output

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

-

4D-4 (ACTD) - Body ground

LA-L - Body ground

Output

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

-

4D-16 (L1) - Body ground

LG - Body ground

Output

Door control switch assembly input

Door control switch assembly off → on (lock)

Pulse generation → Below 1 V

Door Lock SW-Lock

4A-39 (UL1) - Body ground

GR - Body ground

Input

Door control switch assembly input

Door control switch assembly off → on (unlock)

Pulse generation → Below 1 V

Door Lock SW-Unlock

G34-17 (UL3) - Body ground

BE - Body ground

Input

Driver door key-linked unlock input

Driver door key cylinder in neutral position → on (unlock)

11 to 14 V → Below 1 V

D Door Key SW-UL

G34-18 (L2) - Body ground

LG - Body ground

Input

Driver door key-linked lock input

Driver door key cylinder in neutral position → on (lock)

11 to 14 V → Below 1 V

Door Key SW-Lock

4A-7 (GSW) - Body ground

B - Body ground

Input

Airbag sensor signal (collision detection signal)

Engine switch on (IG) with airbag ECU assembly connector disconnected

4.3 to 5.5 V

-

CHECK AIRBAG ECU ASSEMBLY

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    System Diagram

    Rear Door Lock

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