Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000028DYI
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [11/2022 -           ]
Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key 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 connector.

(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)*3

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)*3

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)*3

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)*3

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)*3

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)*3

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 lock 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)*3

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)*3

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)*3

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)*3

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

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

8F-13 (BZR) - Body ground*4

Wireless door lock buzzer output

Active Test Wireless Buzzer on → off

Pulse generation → Below 1 V
  • *1: for Sedan
  • *2: for Hatchback
  • *3: Differs depending on the vehicle model
  • *4: for Gasoline Model

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the I167 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

I167-29 (E) - Body ground

Ground

Always

Below 1 Ω

I167-6 (+B) - Body ground

Auxiliary battery power supply

Ignition switch off

11 to 14 V

(c) Reconnect the I167 certification ECU (smart key ECU assembly) connector.

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

Tester Connection

Terminal Description

Condition

Specified Condition

O174-21 (RCO) - I167-29 (E)

Output to door control receiver

(Power supply for door control receiver. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)

Proceed:

  1. Ignition switch off
  2. Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
  3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

Pulse generation

(See waveform 1)

O174-12 (CSEL) - I167-29 (E)

Communication channel switching circuit

Proceed:

  1. Ignition switch off
  2. Close all doors

No pulse generation → Pulse generation

O174-11 (RDAM) - I167-29 (E)

Door control receiver communication circuit

Proceed:

  1. Ignition switch off
  2. All doors locked
  3. Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
  4. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

Pulse generation

(See waveform 2)

(e) Using an oscilloscope, check waveform 1.

NOTICE:

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

*a

Before lock or unlock switch of electrical key transmitter sub-assembly pressed

*b

After lock or unlock switch of electrical key transmitter sub-assembly pressed

Waveform 1 (Reference)

Item

Content

Tester Connection

O174-21 (RCO) - I167-29 (E)

Tool Setting

2 V/DIV., 500 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area
  3. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed

(f) Using an oscilloscope, check waveform 2.

NOTICE:

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

*a

Before lock or unlock switch of electrical key transmitter sub-assembly pressed

*b

After lock or unlock switch of electrical key transmitter sub-assembly pressed

Waveform 2 (Reference)

Item

Content

Tester Connection

O174-11 (RDAM) - I167-29 (E)

Tool Setting

5 V/DIV., 500 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. All doors locked
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area
  5. Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed