Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM100000001HAJN
Model Year Start: 2020 Model: Corolla Prod Date Range: [01/2019 - 06/2021]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM (for Sedan, HV Model): TERMINALS OF ECU; 2020 - 2021 MY Corolla Corolla HV [01/2019 - 06/2021]

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 2020 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 03/2019]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [03/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(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

I86-19 (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.

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

MB-11 (GND1) - Body ground

-

-

Ground

Always

Below 1 Ω

-

MB-30 (ACC) - Body ground

-

Input

ACC power supply

Power switch on (ACC)

11 to 14 V

ACC SW

Power switch off

Below 1 V

MB-31 (BECU) - Body ground

-

Input

Auxiliary battery power supply

Power switch off

11 to 14 V

-

MB-32 (IG) - Body ground

-

Input

IG power supply

Power switch on (IG)

11 to 14 V

IG SW

Power switch off

Below 1 V

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

Click here 2020 - 2022 MY Corolla Corolla Hatchback Corolla HV GR Corolla [01/2019 - 09/2022]; POWER DISTRIBUTION: MAIN BODY ECU: INSTALLATION

(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

I85-1 (FLCY) - Body ground

BR- Body ground

Input

Front door courtesy light switch (for LH) input

Front door LH open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

FL Door Courtesy SW

I85-6 (FRCY) - Body ground

SB - Body ground

Input

Front door courtesy light switch (for RH) input

Front door RH open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

FR Door Courtesy SW

4A-24 (LCTY) - Body ground

BR - Body ground

Input

Rear door courtesy light switch (for LH) input

Rear door LH open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

RL Door Courtesy SW

4E-31 (RCTY) - Body ground

GR - Body ground

Input

Rear door courtesy light switch (for RH) input

Rear door RH open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

RR Door Courtesy SW

4A-34 (LGCY) - Body ground

SB - Body ground

Input

Luggage compartment door courtesy light switch input

Luggage compartment door open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

Luggage Courtesy SW

4F-13 (LSFL) - Body ground

SB - Body ground

Input

Front door LH unlock detection switch input

Front door LH unlocked → locked

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

FL Door Lock Pos

4F-12 (LSFR) - Body ground

BR - Body ground

Input

Front door RH unlock detection switch input

Front door RH unlocked → locked

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2

FR Door Lock Pos

4F-14 (LSR) - Body ground

GR - Body ground

Input

Rear door LH and RH unlock detection switch input

Rear door LH or RH unlocked → Rear door LH and RH locked

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*2
  • RL-Door Lock Pos SW
  • RR-Door Lock Pos SW

4A-8 (ACT-) - Body ground

W - 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

-

4A-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

-

4A-6 (ACT+) - Body ground

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

-

4F-4 (ACTD) - 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

-

4A-20 (TR+) - Body ground

P - Body ground

Output

Luggage compartment door lock motor unlock drive output

Luggage compartment door opening switch off → on

Below 1 V → 11 to 14 V → Below 1 V

-

I84-17 (UL3) - Body ground

V - 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

I84-18 (L2) - Body ground

G - 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

4E-39 (UL1) - Body ground*

BR - Body ground

Input

Door control switch assembly unlock switch input

Door control switch assembly unlock switch not pushed → pushed

11 to 14 V → Below 1 V

Door Lock SW-Unlock

4F-16 (L1) - Body ground*

LG - Body ground

Input

Door control switch assembly lock switch input

Lock switch of door control switch assembly not pushed → pushed

11 to 14 V → Below 1 V

Door Lock SW-Lock
  • *: w/ Door Control Switch Assembly
  • *2: Differs depending on the vehicle model