THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [03/2023

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002BDHM
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [03/2023 - ]
Title: THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): TERMINALS OF ECU; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [03/2023 - ]

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 O175 and I167 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.

except Manual Transaxle:

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
O175-15 (NE) - Body ground	Engine speed signal	Always	10 kΩ or higher	Power Source Control Engine Condition
O175-21 (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
I167-6 (+B) - I167-29 (E)	Power source	Ignition switch off	11 to 14 V	-
I167-14 (P) - I167-29 (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
O175-22 (CUTB) - Body ground	Dark current cut pin*	Ignition switch off	11 to 14 V	-
I167-29 (E) - Body ground	GND	Always	Below 1 Ω	-
I167-11 (SLP) - I167-29 (E)	GND	Always	Below 1 Ω	-
I167-23 (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
I167-27 (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
I167-19 (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

*: 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).

for Manual Transaxle:

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
O175-15 (NE) - Body ground	Engine speed signal	Always	10 kΩ or higher	Power Source Control Engine Condition
I167-6 (+B) - I167-29 (E)	Power source	Ignition switch off	11 to 14 V	-
O175-22 (CUTB) - Body ground	Dark current cut pin*	Ignition switch off	11 to 14 V	-
I167-29 (E) - Body ground	GND	Always	Below 1 Ω	-
I167-23 (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
I167-27 (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
I167-19 (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

*: 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.

except Manual Transaxle:

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
except K121 CVT: O175-3 (STA) - I167-29 (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*1 → 1.0 V or less	-
for K121 CVT: O175-3 (STA) - I167-29 (E)	P/N position signal	Shift lever in P/N → Shift lever not in P/N	11 to 14 V → 1.0 V or less	-
O175-10 (STAR) - I167-29 (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*1 → 1.0 V or less	-
O175-15 (NE) - Body ground	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 1)	Power Source Control Engine Condition
I167-8 (LIN) - I167-29 (E)	LIN communication line	Ignition switch ON	Pulse generation	-
I167-14 (P) - I167-29 (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
I167-23 (SSW3) - I167-29 (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
I167-27 (SSW2) - I167-29 (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
I167-19 (SSW1) - I167-29 (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
I167-21 (ACCD) - I167-29 (E)	ACC signal	Ignition switch off → Ignition switch ACC	1 V or less → 8.5 V or higher	Power Source Control ACC Relay Monitor
O175-11 (IGRD) - I167-29 (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
O175-24 (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
O175-13 (SPD) - I167-29 (E)	Vehicle speed signal	Vehicle being driven at approx. 5 km/h (3 mph)	Pulse generation (See waveform 3)	Power Source Control Vehicle Running Condition (Line)
I167-4 (CLG5) - I167-29 (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 4)	-
I167-5 (CG5B) - I167-29 (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 4)	-
O174-10 (CLG7) - I167-29 (E)*2	for G16E-GTS: Output to No. 2 indoor electrical key antenna assembly (inside luggage compartment) except G16E-GTS: 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 4)	-
O174-9 (CG7B) - I167-29 (E)*2	for G16E-GTS: Output to No. 2 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal) except G16E-GTS: 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 4)	-
I167-30 (AGND) - Body ground	Transponder key amplifier ground	Always	Below 1 Ω	-
I167-12 (ANT1) - I167-30 (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 5)	Smart Key Encrypt Code Difference
I167-13 (ANT2) - I167-30 (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 5)	Smart Key Encrypt Code Difference
I167-25 (IND) - I167-29 (E)	Security indicator output	Ignition switch off → ON	Pulse generation → Below 2 V	-
O174-20 (WCSW) - I167-29 (E)*3	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)	-

*1: While the engine is cranking, the auxiliary battery voltage may drop to approximately 6 V.
*2: except Sedan
*3: w/ Wireless Charger System

for Manual Transaxle:

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
O175-3 (STA) - I167-29 (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 clutch pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher*1 → 1.0 V or less	-
O175-10 (STAR) - I167-29 (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 clutch pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	6 V or higher*1 → 1.0 V or less	-
O175-15 (NE) - Body ground	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 1)	Power Source Control Engine Condition
I167-11 (SLP) - I167-29 (E)	Steering lock position signal	Steering locked → Steering unlocked	11 to 14 V → 1.5 V or less	Power Source Control Steering Unlock Switch
I167-24 (SLR+) - I167-29 (E)	Steering lock motor operation command signal (Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))	When a door is opened, the steering lock motor will be operated if all of the following conditions are met: The steering is unlocked. The ignition switch is off. The shift position is in P.	Pulse generation (See waveform 2)	-
I167-8 (LIN) - I167-29 (E)	LIN communication line	Ignition switch ON	Pulse generation	Smart Key Steering Lock Start Condition
I167-23 (SSW3) - I167-29 (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
I167-27 (SSW2) - I167-29 (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
I167-19 (SSW1) - I167-29 (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
I167-21 (ACCD) - I167-29 (E)	ACC signal	Ignition switch off → Ignition switch ACC	1 V or less → 8.5 V or higher	Power Source Control ACC Relay Monitor
O175-11 (IGRD) - I167-29 (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
O175-24 (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
O175-13 (SPD) - I167-29 (E)	Vehicle speed signal	Vehicle being driven at approx. 5 km/h (3 mph)	Pulse generation (See waveform 3)	Power Source Control Vehicle Running Condition (Line)
I167-4 (CLG5) - I167-29 (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 4)	-
I167-5 (CG5B) - I167-29 (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 4)	-
O174-10 (CLG7) - I167-29 (E)*2	for G16E-GTS: Output to No. 2 indoor electrical key antenna assembly (inside luggage compartment) except G16E-GTS: 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 4)	-
O174-9 (CG7B) - I167-29 (E)*2	for G16E-GTS: Output to No. 2 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal) except G16E-GTS: 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 4)	-
I167-30 (AGND) - Body ground	Transponder key amplifier ground	Always	Below 1 Ω	-
I167-12 (ANT1) - I167-30 (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 5)	Smart Key Encrypt Code Difference
I167-13 (ANT2) - I167-30 (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 5)	Smart Key Encrypt Code Difference
I167-25 (IND) - I167-29 (E)	Security indicator output	Ignition switch off → ON	Pulse generation → Below 2 V	-
O174-20 (WCSW) - I167-29 (E)*3	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)	-

*1: While the engine is cranking, the auxiliary battery voltage may drop to approximately 6 V.
*2: except Sedan
*3: w/ Wireless Charger System

HINT:

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.

(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	O175-15 (NE) - Body ground
Tool Setting	5 V/DIV., 2 ms./DIV.
Condition	Idling (engine warmed up)

HINT:

The wavelength becomes shorter as the engine speed increases.

(2) Waveform 2 (for Manual Transaxle)

*a	Steering lock motor not operating
*b	Steering lock motor operating

Measurement Condition

Item	Content
Tester Connection	I167-24 (SLR+) - I167-29 (E)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	When a door is opened, the steering lock motor will be operated if all of the following conditions are met: The steering is unlocked. The ignition switch is off.

(3) Waveform 3

Measurement Condition

Item	Content
Tester Connection	O175-13 (SPD) - I167-29 (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.

(4) Waveform 4

*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

I167-4 (CLG5) - I167-29 (E)

I167-5 (CG5B) - I167-29 (E)

O174-10 (CLG7) - I167-29 (E)*

O174-9 (CG7B) - I167-29 (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

*: except Sedan

(5) Waveform 5

Measurement Condition

Item

Content

Tester Connection

I167-12 (ANT1) - I167-30 (AGND)

I167-13 (ANT2) - I167-30 (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

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY) (for Manual Transaxle)

(a) Disconnect the I59 steering lock ECU (steering lock actuator or upper bracket assembly) 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.

Terminal No. (Symbol)	Terminal Description	Condition	Specified Condition	Related Data List Item/DTC
I59-1 (GND) - Body ground	Ground	Always	Below 1 Ω	-
I59-7 (B) - Body ground	Constant power supply	Ignition switch off	11 to 14 V	-

(d) 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
I59-3 (IGE) - I59-1 (GND)	Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly))	Steering lock motor operating when all conditions met, and then door opened: Steering unlocked Ignition switch turned off	Pulse generation (See waveform 1)	Smart Key Power Supply Short History Unlock Request Receive Steering Lock Request Receive
I59-4 (SLP1) - I59-1 (GND)	Steering lock bar position signal (signal output from steering unlock sensor)	Steering locked → unlocked	11 to 14 V → Below 1.5 V	Smart Key Sensor Malfunction History
I59-5 (LIN) - I59-1 (GND)	LIN communication line	Ignition switch ON	Pulse generation	Smart Key Steering Lock Start Condition
I59-6 (SLA) - I59-1 (GND)	Steering lock motor operation permission signal (motor operation permission signal supplied by certification ECU (smart key ECU assembly))	Ignition switch off → ON	Below 1 V → 11 to 14 V	-

HINT:

There is 1 motor and 2 sensors built into the steering lock actuator or upper bracket assembly.
When taking measurements when the lock motor is stopped, it is not necessary to perform any operations.
In order to take measurements when the lock motor is operating, perform either of the following operations:
- To unlock the steering, carry the key and turn the ignition switch to ACC or ON.
- To lock the steering, turn the ignition switch off, and then open a door.

(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.

Waveform 1

*a	Steering lock motor not operating
*b	Steering lock motor operating

Measurement Condition

Item	Content
Tester Connection	I59-3 (IGE) - I59-1 (GND)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	Steering lock motor operating when all conditions met, and then door opened: Steering unlocked Ignition switch turned off

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.

Terminal No. (Symbol)	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.

Terminal No. (Symbol)	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 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 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 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	Smart Key Steering Lock Start Cond*

*: for Manual Transaxle

(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 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 engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

CHECK ECM (for M20A-FKS (except K121 CVT))

(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
A47-1 (BATT) - A47-10 (E1)	+B power supply	Always	11 to 14 V	-
A47-9 (+B) - A47-10 (E1)	+B power supply	Always	11 to 14 V	-
A47-35 (+B2) - A47-10 (E1)	+B power supply	Always	11 to 14 V	-
A47-10 (E1) - Body ground	Ground	Always	Below 1 Ω	-
A47-25 (IMO) - A47-10 (E1)	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 Engine Start Request
A47-25 (IMO) - A47-10 (E1)	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 ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 1)
A47-26 (IMI) - A47-10 (E1)	EFI communication input (Signal output from ID code box (immobiliser code ECU) to ECM)	Ignition switch off	1 V or less
A47-26 (IMI) - A47-10 (E1)	EFI communication input (Signal output from ID code box (immobiliser code ECU) to ECM)	Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 2)
A47-16 (NEO) - A47-10 (E1)	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 3)	Power Source Control Engine Condition
A47-30 (STA) - A47-10 (E1)	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 is cranking	6 V or higher	-

(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 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	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 ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

(3) Waveform 3

Measurement Condition

Item	Content
Tester Connection	A47-16 (NEO) - A47-10 (E1)
Tool Setting	5 V/DI., 2 ms./DIV.
Condition	Idling (engine warmed up)

HINT:

The wavelength becomes shorter as the engine speed increases.

CHECK ECM (for M20A-FKS (K121 CVT))

(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
A178-31 (BATT) - A178-22 (E1)	+B power supply	Always	11 to 14 V	-
A178-22 (E1) - Body ground	Ground	Always	Below 1 Ω	-
A178-55 (IMO) - A178-22 (E1)	EFI communication input (Signal input from ECM to ID code box (immobiliser code ECU))	Ignition switch off	11 to 14 V	Entry&Start EFI Code Receive Engine Start Request
A178-55 (IMO) - A178-22 (E1)	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 ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 1)
A178-54 (IMI) - A178-22 (E1)	EFI communication input (Signal output from ID code box (immobiliser code ECU) to ECM)	Ignition switch off	1 V or less
A178-54 (IMI) - A178-22 (E1)	EFI communication input (Signal output from ID code box (immobiliser code ECU) to ECM)	Ignition switch turned to ON using registered electrical key transmitter sub-assembly	Pulse generation (See waveform 2)
A178-66 (NEO) - A178-22 (E1)	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 3)	Power Source Control Engine Condition
A178-18 (STA) - A178-22 (E1)	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 is cranking	6 V or higher	-
A178-81 (PPOS) - A178-22 (E1)	P/N position signal	Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)	9.45 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	A178-55 (IMO) - A178-22 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine 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	A178-54 (IMI) - A178-22 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Ignition switch turned to ON using registered electrical key transmitter sub-assembly

(3) Waveform 3

Measurement Condition

Item	Content
Tester Connection	A178-66 (NEO) - A178-22 (E1)
Tool Setting	2 V/DI., 2 ms./DIV.
Condition	Idling (engine warmed up)

HINT:

The wavelength becomes shorter as the engine speed increases.

CHECK ECM (for G16E-GTS)

(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
A139-1 (BATT) - A139-10 (E1)	+B power supply	Always	11 to 14 V	-
A139-9 (+B) - A139-10 (E1)	+B power supply	Always	11 to 14 V	-
A139-35 (+B2) - A139-10 (E1)	+B power supply	Always	11 to 14 V	-
A139-10 (E1) - Body ground	Ground	Always	Below 1 Ω	-
A139-47 (IMO) - A139-10 (E1)	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 Engine Start Request
A139-47 (IMO) - A139-10 (E1)	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 ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 1)
A139-61 (IMI) - A139-10 (E1)	EFI communication input (Signal output from ID code box (immobiliser code ECU) to ECM)	Ignition switch off	1 V or less
A139-61 (IMI) - A139-10 (E1)	EFI communication input (Signal output from ID code box (immobiliser code ECU) to ECM)	Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery	Pulse generation (See waveform 2)
A139-16 (NEO) - A139-10 (E1)	Engine speed signal	Idling (engine warmed up)	Pulse generation (See waveform 3)	Power Source Control Engine Condition
A139-30 (STA) - A139-10 (E1)	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 is cranking	6 V or higher	-

(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	A139-47 (IMO) - A139-10 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine 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	A139-61 (IMI) - A139-10 (E1)
Tool Setting	2 V/DIV., 500 ms./DIV.
Condition	Within 3 seconds of engine start or within 3 seconds of ignition switch turned to ON after cable disconnected and reconnected to auxiliary battery

(3) Waveform 3

Measurement Condition

Item	Content
Tester Connection	A139-16 (NEO) - A139-10 (E1)
Tool Setting	5 V/DI., 2 ms./DIV.
Condition	Idling (engine warmed up)

HINT:

The wavelength becomes shorter as the engine speed increases.

CHECK ENGINE SWITCH

(a) Disconnect the I35 engine switch connector.

(b) 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	-

(d) 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 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
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 1)
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 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 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 Start Switch 1

(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 (Reference)

Measurement Condition

Item

Content

Tester Connection

I35-1 (ANT1) - I35-3 (GND)

I35-7 (ANT2) - I35-3 (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 engine switch pressed

SMART KEY SYSTEM (for Entry Function)

Click here

TERMINALS OF ECU

except Manual Transaxle:

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

for Manual Transaxle:

Power Source Control

Power Source Control

Power Source Control

Power Source Control

except Manual Transaxle:

except K121 CVT:

for K121 CVT:

Outputs voltage to the starter relay

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

for G16E-GTS:

except G16E-GTS:

for G16E-GTS:

except G16E-GTS:

Smart Key

for Manual Transaxle:

Outputs voltage to the starter relay

Power Source Control

Power Source Control

Smart Key

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

Power Source Control

for G16E-GTS:

except G16E-GTS:

for G16E-GTS:

except G16E-GTS:

Smart Key

Measurement Condition

Measurement Condition

Measurement Condition

Measurement Condition

Measurement Condition

Smart Key

Smart Key

Smart Key

Measurement Condition

Smart Key

Power Source Control

Measurement Condition

Measurement Condition

Measurement Condition

Entry&Start

Power Source Control

Measurement Condition

Measurement Condition

Measurement Condition

Smart Key

Power Source Control

Measurement Condition

Measurement Condition

Measurement Condition

Smart Key

Power Source Control

Power Source Control

Power Source Control

Measurement Condition