Toyota Corolla Cross: Terminals Of Ecu

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Interior / Theft Deterrent / Keyless Entry / Smart Key System (for Start Function, Hev 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.
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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 resistance and voltage according to the value(s) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
I223-21 (STP1) - Body ground	Stop light switch signal	Brake pedal depressed → Brake pedal released	9 V or higher → 1 V or less	Power Source Control Stop Light Switch
I222-6 (+B) - I222-29 (E)	Power source	Ignition switch off	11 to 14 V	-
I222-14 (P) - I222-29 (E)	P position signal	Shift position in P → Shift position not in P	30 kΩ or higher → Below 200 Ω	Power Source Control Shift P Signal
I223-22 (CUTB) - Body ground	Dark current cut pin*	Ignition switch off	11 to 14 V	-
I222-29 (E) - Body ground	GND	Always	Below 1 Ω	-
I222-11 (SLP) - I222-29 (E)	GND	Always	Below 1 Ω	-
I222-23 (SSW3) - Body ground	SSW3 contact signal	Power switch pushed → Power switch not pushed	Below 15 Ω → 10 kΩ or higher	Power Source Control Push Start Switch 3
I222-27 (SSW2) - Body ground	SSW2 contact signal	Power switch pushed → Power switch not pushed	Below 15 Ω → 10 kΩ or higher	Power Source Control Push Start Switch 2
I222-19 (SSW1) - Body ground	SSW1 contact signal	Power switch pushed → Power switch not pushed	Below 15 Ω → 10 kΩ or higher	Power Source Control Push Start Switch 1

*: 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).

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

Tester Connection	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
I222-8 (LIN) - I222-29 (E)	LIN communication line	Ignition switch ON	Pulse generation	-
I222-14 (P) - I222-29 (E)	P position signal	Shift position in P → Shift position not in P	9 V or higher → 2.76 V or less	Power Source Control Shift P Signal
I222-23 (SSW3) - I222-29 (E)	SSW3 contact signal	Power switch not pushed → Power switch pushed	9 V or higher → 1 V or less	Power Source Control Push Start Switch 3
I222-27 (SSW2) - I222-29 (E)	SSW2 contact signal	Power switch not pushed → Power switch pushed	9 V or higher → 1 V or less	Power Source Control Push Start Switch 2
I222-19 (SSW1) - I222-29 (E)	SSW1 contact signal	Power switch not pushed → Power switch pushed	9 V or higher → 1 V or less	Power Source Control Push Start Switch 1
I222-21 (ACCD) - I222-29 (E)	ACC signal	Ignition switch off → Ignition switch ACC	1 V or less → 8.5 V or higher	Power Source Control ACC Relay Monitor
I223-11 (IGRD) - I222-29 (E)	IG signal	Ignition switch off → Ignition switch ON	1 V or less → 9 V or higher	Power Source Control IGR Relay Circuit (Outside) Monitor
I223-24 (IGPD) - I167-29 (E)	IG signal	Ignition switch off → Ignition switch ON	1 V or less → 9 V or higher	Power Source Control IGP Relay Circuit (Outside) Monitor
I223-13 (SPD) - I222-29 (E)	Vehicle speed signal	Vehicle being driven at approx. 5 km/h (3 mph)	Pulse generation (See waveform 1)	Power Source Control Vehicle Running Condition (Line)
I223-2 (ST2) - I222-29 (E)	STSW signal	With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released	8.5 V or higher → 1 V or less	-
I222-4 (CLG5) - I222-29 (E)	Output to No. 1 indoor electrical key antenna assembly (front floor)	Procedure: Ignition switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 2)	-
I222-5 (CG5B) - I222-29 (E)	Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal)	Procedure: Ignition switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 2)	-
I222-30 (AGND) - Body ground	Transponder key amplifier ground	Always	Below 1 Ω	-
I222-12 (ANT1) - I222-30 (AGND)	Signal input / output from transponder key coil (transponder key coil built into power switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed	Pulse generation (See waveform 3)	Smart Key Encrypt Code Difference
I222-13 (ANT2) - I222-30 (AGND)	Signal input / output from transponder key coil (transponder key coil built into power switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed	Pulse generation (See waveform 3)	Smart Key Encrypt Code Difference
I222-25 (IND) - I222-29 (E)	Security indicator output	Ignition switch off → ON	Pulse generation → Below 2 V	-
O200-20 (WCSW) - I222-29 (E)*	Wireless charger system stop signal	Procedure: Ignition switch off Electrical key transmitter sub-assembly inside vehicle Ignition switch off → ACC or ON	Below 1 V → 4.5 to 6 V (For 1 second after ignition switch to ACC or ON)	-

*: w/ Wireless Charging System

(e) Using an oscilloscope, check the waveform of the ECU.

NOTICE:

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

(1) Waveform 1

Measurement Condition

Item	Content
Tester Connection	I223-13 (SPD) - I222-29 (E)
Tool Setting	5 V/DIV., 20 ms./DIV.
Condition	Vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(2) Waveform 2

*a	For 30 seconds after any door closed
*b	After 30 seconds or more have elapsed since any door closed

Measurement Condition

Item	Content
Tester Connection	I222-4 (CLG5) - I222-29 (E) I222-5 (CG5B) - I222-29 (E)
Tool Setting	5 V/DIV., 500 ms/DIV.
Condition	Procedure: Ignition switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door

Item

Content

Tester Connection

I222-4 (CLG5) - I222-29 (E)

I222-5 (CG5B) - I222-29 (E)

Tool Setting

5 V/DIV., 500 ms/DIV.

Condition

Procedure:

Ignition switch off
Electrical key transmitter sub-assembly not inside vehicle
Within 30 seconds of closing any door

(3) Waveform 3

Measurement Condition

Item	Content
Tester Connection	I222-12 (ANT1) - I222-30 (AGND) I222-13 (ANT2) - I222-30 (AGND)
Tool Setting	5 V/DIV., 200 ms/DIV.
Condition	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Item

Content

Tester Connection

I222-12 (ANT1) - I222-30 (AGND)

I222-13 (ANT2) - I222-30 (AGND)

Tool Setting

5 V/DIV., 200 ms/DIV.

Condition

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

CHECK ID CODE BOX (IMMOBILISER CODE ECU)

(a) Disconnect the I20 ID code box (immobiliser code ECU) connector.

(b) 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 connector disconnected.

Tester Connection	Terminal Description	Condition	Specified Condition	Related Data List Item
I20-1 (+B) - Body ground	Power source	Ignition switch off	11 to 14 V	-
I20-5 (GND) - Body ground	Ground	Always	Below 1 Ω	-

(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
I20-3 (EFII) - I20-5 (GND)	EFI communication input (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))	Ignition switch off	11 to 14 V	Smart Key EFI Code Receive Start Request
I20-3 (EFII) - I20-5 (GND)	EFI communication input (Signal input from hybrid vehicle control ECU to ID code box (immobiliser code ECU))	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 1)
I20-4 (EFIO) - I20-5 (GND)	EFI communication output (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)	Ignition switch off	Below 1 V
I20-4 (EFIO) - I20-5 (GND)	EFI communication output (Signal output from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 2)
I20-2 (LIN1) - I20-5 (GND)	LIN communication line	Ignition switch ON	Pulse generation	-

(e) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1

Approximately 160 ms.

Approximately 270 ms.

Item	Content
Tester Connection	I20-3 (EFII) - I20-5 (GND)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

(2) Waveform 2

Approximately 160 ms.

Approximately 270 ms.

Item	Content
Tester Connection	I20-4 (EFIO) - I20-5 (GND)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

CHECK HYBRID VEHICLE CONTROL ECU

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

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
I249-8 (+B1) - I249-1 (E1)	Ignition power supply	Ignition switch ON	11 to 14 V	-
I249-1 (E1) - Body ground	Ground	Always	Below 1 Ω	-
I249-39 (IMO) - I249-1 (E1)	EFI communication output (Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))	Ignition switch off	11 to 14 V	EFI Code Receive Start Request
I249-39 (IMO) - I249-1 (E1)	EFI communication output (Signal output from hybrid vehicle control ECU to ID code box (immobiliser code ECU))	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 1)
I249-53 (IMI) - I249-1 (E1)	EFI communication input (Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)	Ignition switch off	11 to 14 V → 1 V or less
I249-53 (IMI) - I249-1 (E1)	EFI communication input (Signal input from ID code box (immobiliser code ECU) to hybrid vehicle control ECU)	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 2)
I249-11 (ST2) - I249-1 (E1)	Hybrid control system start request signal	With the brake pedal depressed, the power switch is pressed and held → After approx. 3 sec. has elapsed, the power switch is released	8.5 V or higher → 1.0 V or less	-

(b) Using an oscilloscope, check the waveform.

NOTICE:

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

(1) Waveform 1 (Reference)

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	I249-39 (IMO) - I249-1 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

(2) Waveform 2 (Reference)

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	I249-53 (IMI) - I249-1 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of hybrid control system start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

CHECK POWER SWITCH

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

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
I280-3 (GND) - Body ground	Transponder key amplifier ground	Always	Below 1 Ω	-

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

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
I280-1 (ANT1) - I280-3 (GND)	Signal input / output from transponder key coil (transponder key coil built into power switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed	Pulse generation (See waveform 1)	Smart Key Encrypt Code Difference HINT: If immobiliser key code verification communication is not performed correctly, the malfunction may be indicated by one or more of the Data List items listed above
I280-7 (ANT2) - I280-3 (GND)	Signal input / output from transponder key coil (transponder key coil built into power switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed	Pulse generation (See waveform 2)
I280-11 (SS3) - I280-3 (GND)	SS3 contact signal HINT: Backup for SS1. Behaves the same way as SS1.	Power switch not pushed → Power switch pushed	9 V or higher → Below 1 V	Power Source Control Push Start Switch 3
I280-6 (SS2) - I280-3 (GND)	SS2 contact signal HINT: Backup for SS1. Behaves the same way as SS1.	Power switch not pushed → Power switch pushed	9 V or higher → Below 1 V	Power Source Control Push Start Switch 2
I280-12 (SS1) - I280-3 (GND)	SS1 contact signal	Power switch not pushed → Power switch pushed	9 V or higher → Below 1 V	Power Source Control Push Start Switch 1

NOTICE:

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

(1) Waveform 1 (Reference)

Measurement Condition

Item	Content
Tester Connection	I280-1 (ANT1) - I280-3 (GND) I280-7 (ANT2) - I280-3 (GND)
Tool Setting	5 V/DIV., 200 ms./DIV.
Condition	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

Item

Content

Tester Connection

I280-1 (ANT1) - I280-3 (GND)

I280-7 (ANT2) - I280-3 (GND)

Tool Setting

5 V/DIV., 200 ms./DIV.

Condition

Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of power switch pressed

SMART KEY SYSTEM (for Entry Function)

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SEE MORE:

System Voltage Circuit Short to Ground or Open (P056014)

MONITOR DESCRIPTION The auxiliary battery supplies electricity to the ECM even when the ignition switch is off. This power allows the ECM to store data such as DTC history, Freeze Frame Data and fuel trim values. If the auxiliary battery voltage falls below a minimum level, the memory is cleared and

Inspection

INSPECTION PROCEDURE 1. INSPECT REAR POWER WINDOW REGULATOR SWITCH ASSEMBLY (for LH Side) (a) Check the resistance. (1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition N3-5 (UP) -

Toyota Corolla Cross: Terminals Of Ecu

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Inspection