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, 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.
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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
I223-15 (NE) - Body ground	Engine speed signal	Always	10 kΩ or higher	Engine Condition
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 lever in P → Shift lever 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	-
I222-23 (SSW3) - Body ground	SSW3 contact signal	Engine switch pushed → Engine 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	Engine switch pushed → Engine 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	Engine switch pushed → Engine switch not pushed	Below 15 Ω → 10 kΩ or higher	Power Source Control Push Start Switch 1
I223-13 (SPD) - Body ground	Vehicle speed signal	Always	30 kΩ or higher	Vehicle Speed Signal

*: 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
I223-3 (STA) - I222-29 (E)	When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started".	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher*2 → 1.0 V or less	-
I223-10 (STAR) -I222-29 (E)	Outputs voltage to the starter relay Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 1000 rpm.) HINT: When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher*2 → 1.0 V or less	-
I223-10 (STAR) -I222-29 (E)	Receives neutral start switch (P, N position detection) signal Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).	Perform the following operations except while the engine is cranking: Shift lever in any position other than P or N → Shift lever in P or N (at 20°C (68°F))	9 V or higher → 2.7 V or less	Neutral SW/ Clutch SW
I223-15 (NE) - I222-29 (E)	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 1)	Engine Condition
I223-21 (STP1) -I222-29 (E)	Stop light switch signal	Brake pedal released → Brake pedal depressed	1 V or less → 9 V or higher	Stop Light Switch1
I222-11 (SLP) - Body Ground	GND	Always	Below 1 Ω	-
I222-8 (LIN) - I222-29 (E)	LIN communication line	Ignition switch ON	Pulse generation	Smart Key Steering Lock Start Condition
I222-14 (P) - I222-29 (E)	P position signal	Shift lever in P → Shift lever 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	Engine switch not pushed → Engine 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	Engine switch not pushed → Engine 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	Engine switch not pushed → Engine 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) - I222-29 (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)
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)	-
O200-10 (CLG7) - I222-29 (E)	Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment)	Procedure: Ignition switch off Electrical key transmitter sub-assembly not inside vehicle Within 30 seconds of closing any door	Pulse generation (See waveform 2)	-
O200-9 (CG7B) - I222-29 (E)	Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 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 engine switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine 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 engine switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 4)	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	Below 1 V → 4.5 to 6 V (For 1 second after ignition switch to ACC)	-

*: w/ Wireless Charging System

HINT:

*2: While the engine is cranking, the auxiliary battery voltage may drop to approximately 6 V.
The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation.
The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed:
- To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the ignition switch to ACC or ON.
- To lock the steering, open a door with the ignition switch off and the shift lever in P.

(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) O200-2 (CG6B) - I222-29 (E) O200-1 (CLG6) - I222-29 (E) O200-10 (CLG7) - I222-29 (E) O200-9 (CG7B) - 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)

O200-2 (CG6B) - I222-29 (E)

O200-1 (CLG6) - I222-29 (E)

O200-10 (CLG7) - I222-29 (E)

O200-9 (CG7B) - 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)
Tool Setting	5 V/DIV., 200 ms./DIV.
Condition	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

(4) Waveform 4

Measurement Condition

Item	Content
Tester Connection	I222-13 (ANT2) - I222-30 (AGND)
Tool Setting	20 V/DIV., 200 ms./DIV.
Condition	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine 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 ECM 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 ECM to ID code box (immobiliser code ECU))	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) 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 ECM)	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 ECM)	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) 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	Smart Key Steering Lock Start Condition

(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 engine start or within 3 seconds of engine switch turned on (IG) 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 engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

CHECK ECM

(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
A47-2 (IGP) - A47-10 (E1)	Ignition power supply	Ignition switch ON	11 to 14 V	-
A47-14 (IGR) - A47-10 (E1)	Ignition power supply	Ignition switch ON	11 to 14 V	-
A47-10 (E1) - Body ground	Ground	Always	Below 1 Ω	-
A47-25 (IMO) - A47-10 (E1)	EFI communication output (Signal output from ECM to ID code box (immobiliser code ECU))	Engine switch on (IG)	11 to 14 V	EFI Code Receive Start Request
A47-25 (IMO) - A47-10 (E1)	EFI communication output (Signal output from ECM to ID code box (immobiliser code ECU))	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 1)
A47-26 (IMI) - A47-10 (E1)	EFI communication input (Signal input from ID code box (immobiliser code ECU) to ECM)	Engine switch on (IG)	Below 1 V
A47-26 (IMI) - A47-10 (E1)	EFI communication input (Signal input from ID code box (immobiliser code ECU) to ECM)	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 2)

(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	A47-25 (IMO) - A47-10 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

(2) Waveform 2 (Reference)

Approximately 160 ms.

Approximately 270 ms.

Measurement Condition

Item	Content
Tester Connection	A47-26 (IMI) - A47-10 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine start or within 3 seconds of engine switch turned on (IG) after cable disconnected and reconnected to auxiliary battery

CHECK ENGINE 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
I35-3 (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
I35-1 (ANT1) - I35-3 (GND)	Signal input / output from transponder key coil (transponder key coil built into engine switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 1)	Smart Key BCC Malfunction Abnormal Status Encrypt Code Difference Different Serial Number Frame Error No Response 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
I35-7 (ANT2) - I35-3 (GND)	Signal input / output from transponder key coil (transponder key coil built into engine switch)	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed	Pulse generation (See waveform 2)
I35-11 (SS3) - I35-3 (GND)	SS3 contact signal HINT: Backup for SS1. Behaves the same way as SS1.	Engine switch not pushed → Engine switch pushed	9 V or higher → Below 1 V	Power Source Control Push Start Switch 3
I35-6 (SS2) - I35-3 (GND)	SS2 contact signal HINT: Backup for SS1. Behaves the same way as SS1.	Engine switch not pushed → Engine switch pushed	9 V or higher → Below 1 V	Power Source Control Push Start Switch 2
I35-12 (SS1) - I35-3 (GND)	SS1 contact signal	Engine switch not pushed → Engine 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	I35-1 (ANT1) - I35-3 (GND)
Tool Setting	20 V/DIV., 200 ms./DIV.
Condition	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

(2) Waveform 2 (Reference)

Measurement Condition

Item	Content
Tester Connection	I35-7 (ANT2) - I35-3 (GND)
Tool Setting	20 V/DIV., 200 ms./DIV.
Condition	Ignition switch off, electrical key transmitter sub-assembly not in cabin, within 30 seconds of engine switch pressed

SMART KEY SYSTEM (for Entry Function)

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