Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Terminals Of Ecu

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Entry Function, Gasoline Model) / Terminals Of Ecu

TERMINALS OF ECU

NOTICE:

  • When performing an inspection, make sure that "ACC Customize" is set to "ON" using the multi-display.

    Click here

  • When "ACC Customize" is set to "ON" (ACC supply power enabled), the certification ECU (smart key ECU assembly) controls the ACC relay on and off. When "ACC Customize" is set to "OFF" (ACC supply power disabled), the certification ECU (smart key ECU assembly) and radio and display receiver assembly control the ACC relay on and off.

    Therefore, inspection conditions and results may differ depending on whether "ACC customize" is set to ON or OFF when inspecting ACC related terminals.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the I223 and I222 certification ECU (smart key ECU assembly) connectors.

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

Tester Connection

Terminal Description

Condition

Specified Condition

Related Data List Item

I222-29 (E) - Body ground

Ground

Always

Below 1 Ω

-

I222-6 (+B) - I222-29 (E)

Power supply

Ignition switch off

11 to 14 V

-

I223-22 (CUTB) - I222-29 (E)

Dark current cut pin*

Ignition switch off

11 to 14 V

-
  • *: In order to prevent the vehicle auxiliary battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is installed in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the vehicle auxiliary battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of radio waves every 0.25 seconds, which form the detection area, stops).

(c) Reconnect the I223 and I222 certification ECU (smart key ECU assembly) connectors.

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

Tester Connection

Terminal Description

Condition

Specified Condition

Related Data List Item

I223-24 (IGPD) - I222-29 (E)

IG power supply

Ignition switch off → ON

Below 1 V → 9 V or higher

 Power source control
  • IGP Relay Circuit (Outside) Monitor

I223-11 (IGRD) - I222-29 (E)

IG power supply

Ignition switch off → ON

Below 1 V → 9 V or higher

 Power source control
  • IGR Relay Circuit (Outside) Monitor

I222-21 (ACCD) - I222-29 (E)

ACC power supply

Ignition switch off → ACC

Below 1 V → 8.5 V or higher

 Power source control
  • ACC Relay Monitor

I222-16 (CLG1) - I222-29 (E)

Output to driver door electrical key antenna

(request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area)

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*1)

Pulse generation

(See waveform 1)

-

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*1)

Pulse generation

(See waveform 2)

-

I222-16 (CLG1) - I222-29 (E)

Input to driver door lock sensor

(front door outside handle assembly LH lock sensor on signal is sent to the certification ECU (smart key ECU assembly))

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*1)

  5. Driver door lock sensor touched

Pulse generation

(See waveform 3)

 Smart Key
  • Driver Side Lock Sensor

I222-16 (CLG1) - I222-29 (E)

Input to driver door unlock sensor

(when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly))

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors locked
  4. Electrical key transmitter sub-assembly not near the vehicle
  5. Driver door unlock sensor touched

Pulse generation

(See waveform 4)

 Smart Key
  • Driver Side Unlock Sensor

I222-15 (CG1B) - I222-29 (E)

Output to driver door electrical key antenna (terminal on opposite side of component from CLG1 output terminal)

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*1)

Pulse generation

(See waveform 5)

-

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*1)

Pulse generation

(See waveform 6)

-

I222-10 (CLG2) - I222-29 (E)

Output to front passenger door electrical key antenna

(request signal (challenge) is sent to door electrical key antenna from certification ECU (smart key ECU assembly) to form detection area)

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*1)

Pulse generation

(See waveform 1)

-

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*1)

Pulse generation

(See waveform 2)

-

I222-10 (CLG2) - I222-29 (E)

Input to front passenger door lock sensor

(front door outside handle assembly (for front passenger door) lock sensor on signal is sent to the certification ECU (smart key ECU assembly))

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*1)

  5. Front passenger door lock sensor touched

Pulse generation

(See waveform 3)

 Smart Key
  • Passenger Side Lock Sensor

I222-10 (CLG2) - I222-29 (E)

Input to front passenger door unlock sensor

(when system is in unlock standby mode and unlock sensor is touched, door electrical key antenna sends unlock sensor input signal (sensing) to certification ECU (smart key ECU assembly))

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors locked
  4. Electrical key transmitter sub-assembly not near the vehicle
  5. Front passenger door unlock sensor touched

Pulse generation

(See waveform 4)

 Smart Key
  • Passenger Side Lock Sensor

I222-9 (CG2B) - I222-29 (E)

Output to front passenger door electrical key antenna (terminal on opposite side of component from CLG2 output terminal)

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*1)

Pulse generation

(See waveform 5)

-

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*1)

Pulse generation

(See waveform 6)

-

O200-4 (CLG8) - I222-29 (E)

Output to electrical key antenna (outside luggage compartment)

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. Back door opener switch assembly off → on

Pulse generation

(See waveform 7)

-

O200-3 (CG8B) - I222-29 (E)

Output to electrical key antenna (outside luggage compartment) (terminal on opposite side of component from CLG8 output terminal)

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. Back door opener switch assembly off → on

Pulse generation

(See waveform 8)

-

O200-16 (TSW5) - I222-29 (E)

Back door opener switch assembly (open switch) signal input

Back door opener switch assembly (open switch) off → on

Pulse generation

(See waveform 9)

 Smart Key
  • Trunk Lid/Back Door Unlock Switch

O200-17 (TSW6) - I222-29 (E)

Back door opener switch assembly (lock switch) signal input

Back door opener switch assembly (lock switch) off → on

Pulse generation

(See waveform 9)

 Smart Key
  • Trunk Lid/Back Door Lock Switch

O200-21 (RCO) - I222-29 (E)

Output to electrical key and tire pressure warning ECU and receiver

(Power supply for electrical key and tire pressure warning ECU and receiver. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)

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

Pulse generation

(See waveform 10)

-

O200-11 (RDAM) - I222-29 (E)

Electrical key and tire pressure warning ECU and receiver verifies data received from electrical key transmitter sub-assembly.

Electrical key and tire pressure warning ECU and receiver sends data from electrical key transmitter sub-assembly to certification ECU (smart key ECU assembly) (Electrical key and tire pressure warning ECU and receiver intermittently grounds 12 V signal from certification ECU (smart key ECU assembly)).

Proceed:

  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

Pulse generation

(See waveform 11)

-

O200-12 (CSEL) - I222-29 (E)

Communication channel switching circuit

Procedure:

  1. Ignition switch off
  2. All doors closed

Below 1 V → Pulse generation

-
  • *1: For details about the entry function detection area, refer to Operation Check.

    Click here

(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.

Waveform 1 (Reference)

Item

Content

Tester Connection

I222-16 (CLG1) - I222-29 (E)

I222-10 (CLG2) - I222-29 (E)

Tool Setting

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

Condition

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*)
  • *: For details about the entry function detection area, refer to Operation Check.

    Click here

(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.

Waveform 2 (Reference)

Item

Content

Tester Connection

I222-16 (CLG1) - I222-29 (E)

I222-10 (CLG2) - I222-29 (E)

Tool Setting

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

Condition

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*)
  • *: For details about the entry function detection area, refer to Operation Check.

    Click here

(g) Using an oscilloscope, check waveform 3.

NOTICE:

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

*a

Lock sensor not touched

*b

Lock sensor touched
Waveform 3 (Reference)

Item

Content

Tester Connection

I222-16 (CLG1) - I222-29 (E)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*)

  5. Driver door lock sensor not touched → touched

Item

Content

Tester Connection

I222-10 (CLG2) - I222-29 (E)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*)

  5. Front passenger door lock sensor not touched → touched
  • *: For details about the entry function detection area, refer to Operation Check.

    Click here

(h) Using an oscilloscope, check waveform 4.

NOTICE:

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

*a

Unlock sensor not touched

*b

Unlock sensor touched
Waveform 4 (Reference)

Item

Content

Tester Connection

I222-16 (CLG1) - I222-29 (E)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors locked
  4. Electrical key transmitter sub-assembly not near the vehicle
  5. Driver door unlock sensor not touched → touched

Item

Content

Tester Connection

I222-10 (CLG2) - I222-29 (E)

Tool Setting

5 V/DIV., 100 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors locked
  4. Electrical key transmitter sub-assembly not near the vehicle
  5. Front passenger door unlock sensor not touched → touched

(i) Using an oscilloscope, check waveform 5.

NOTICE:

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

Waveform 5 (Reference)

Item

Content

Tester Connection

I222-15 (CG1B) - I222-29 (E)

I222-9 (CG2B) - I222-29 (E)

Tool Setting

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

Condition

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought inside detection area*)
  • *: For details about the entry function detection area, refer to Operation Check.

    Click here

(j) Using an oscilloscope, check waveform 6.

NOTICE:

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

Waveform 6 (Reference)

Item

Content

Tester Connection

I222-15 (CG1B) - I222-29 (E)

I222-9 (CG2B) - I222-29 (E)

Tool Setting

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

Condition

Procedure:

  1. Ignition switch off
  2. All doors closed
  3. Electrical key transmitter sub-assembly not inside vehicle
  4. All doors locked through wireless operation

    (electrical key transmitter sub-assembly brought outside detection area*)
  • *: For details about the entry function detection area, refer to Operation Check.

    Click here

(k) Using an oscilloscope, check waveform 7.

NOTICE:

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

Waveform 7 (Reference)

Item

Content

Tester Connection

O200-4 (CLG8) - I222-29 (E)

Tool Setting

5 V/DIV., 50 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. Back door opener switch assembly off → on

(l) Using an oscilloscope, check waveform 8.

NOTICE:

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

Waveform 8 (Reference)

Item

Content

Tester Connection

O200-3 (CG8B) - I222-29 (E)

Tool Setting

5 V/DIV., 50 ms./DIV.

Condition

Procedure:

  1. Ignition switch off
  2. Electrical key transmitter sub-assembly brought outside vehicle
  3. All doors closed
  4. Back door opener switch assembly off → on

(m) Using an oscilloscope, check waveform 9.

NOTICE:

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

*a

Checking for switch on signal at short intervals

*b

Before back door opener switch assembly pressed

*c

After back door opener switch assembly pressed
Waveform 9 (Reference)

Item

Content

Tester Connection

O200-16 (TSW5) - I222-29 (E)

Tool Setting

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

Condition

Back door opener switch assembly (open switch) off → on

Item

Content

Tester Connection

O200-17 (TSW6) - I222-29 (E)

Tool Setting

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

Condition

Back door opener switch assembly (lock switch) off → on

(n) Using an oscilloscope, check waveform 10.

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 10 (Reference)

Item

Content

Tester Connection

O200-21 (RCO) - I222-29 (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

(o) Using an oscilloscope, check waveform 11.

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 11 (Reference)

Item

Content

Tester Connection

O200-11 (RDAM) - I222-29 (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

*1

Power Distribution Box Assembly

*2

Main Body ECU (Multiplex Network Body 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.

Click here

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

Tester Connection

Terminal Description

Condition

Specified Condition

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

MB-26 (BECU) - Body ground

Auxiliary battery power supply (for CPU)

Ignition switch off

11 to 14 V

SMART KEY SYSTEM (for Start Function)

Click here

POWER DOOR LOCK CONTROL SYSTEM

Click here

WIRELESS DOOR LOCK CONTROL SYSTEM

Click here

POWER BACK DOOR SYSTEM

Click here

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