Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028DY2
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]

TERMINALS OF ECU

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

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

(b) Reconnect the power distribution box assembly connectors.

(c) 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)

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

Ignition switch off

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.

(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

8H-22 (FRCY) - Body ground

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)*4

8H-23 (FLCY) - Body ground

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)*4

8H-27 (RCTY) - Body ground

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)*4

8H-18 (LCTY) - Body ground

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)*4

8H-5 (BCTY) - Body ground*2

Back door courtesy light switch input

Back door open → closed

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*4

8H-5 (LGCY) -Body ground*1

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)*4

8H-32 (TR+) - Body ground*2

Back door lock motor drive output

Back door closed → open

Below 1 V → 11 to 14 V → Below 1 V

8H-32 (TR+) - Body ground*1

Luggage compartment door motor drive output

Luggage compartment door closed → open

Below 1 V → 11 to 14 V → Below 1 V

8A-7 (ACTD) - 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

8H-34 (ACT-) - Body ground

8H-35 (ACT-) - Body ground

8H-37 (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

I85-3 (LSFR) - Body ground

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)*4

I85-9 (LSFL) - Body ground

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)*4

I86-23 (LSWR) - Body ground

Rear door RH unlock detection switch input

Rear door RH unlocked → locked

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*4

I85-10 (LSWL) - Body ground

Rear door LH unlock detection switch input

Rear door LH unlocked → locked

Below 1 V → 11 to 14 V or pulse output (maximum 14 V)*4

I85-28 (L2) - Body ground

Driver door key-linked lock input

Driver door key cylinder turned to lock

Below 1 V

Driver door key cylinder not turned

Pulse generation

Front passenger door key-linked lock input*3

Front passenger door key cylinder turned to lock

Below 1 V

Front passenger door key cylinder not turned

Pulse generation

I85-4 (UL3) - Body ground

Driver door key-linked unlock input

Driver door key cylinder turned to unlock

Below 1 V

Driver door key cylinder not turned

Pulse generation

I231-25 (UL2) - Body ground*3

Front passenger door key-linked unlock input

Front passenger door key cylinder turned to unlock

Below 1 V

Front passenger door key cylinder not turned

Pulse generation

I86-7 (UL1) - Body ground

Door control switch assembly unlock switch input

Unlock switch of door control switch assembly not pushed → pushed

11 to 14 V → Below 1 V

I86-6 (L1) - Body ground

Door control switch assembly lock switch input

Lock switch of door control switch assembly not pushed → pushed

11 to 14 V → Below 1 V
  • *1: for Sedan
  • *2: for Hatchback
  • *3: w/ Front Passenger Door Key Cylinder
  • *4: Differs depending on the vehicle model

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (w/ Smart Key System)

Click here 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [11/2022 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): TERMINALS OF ECU