Terminals Of Ecu [06/2015 - ]

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the G40 and G41 certification ECU (smart key ECU assembly) connectors.

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	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item
G40-2 (STP1) - Body ground	Input	W - Body ground	Stop light switch signal	Brake pedal depressed → Brake pedal released	9 V or higher → 1 V or less	Stop Light Switch1
G41-10 (+B) - G41-11 (E)	Input	R - W-B	Power source	Power switch off	11 to 14 V	-
G41-22 (PPOS) - G41-11 (E)	Input	L - W-B	P position signal	Always	30 kΩ or higher	-
G41-11 (E) - Body ground	-	W-B - Body ground	GND	Always	Below 1 Ω	-
G41-18 (SSW2) - Body ground	Input	V - Body ground	SSW2 contact signal HINT: Backup for SSW1. Behaves the same way as SSW1.	Power switch pushed → Power switch not pushed	Below 15 Ω → 10 kΩ or higher	Start Switch2
G41-16 (SSW1) - Body ground	Input	L - Body ground	SSW1 contact signal	Power switch pushed → Power switch not pushed	Below 15 Ω → 10 kΩ or higher	Start Switch1
G41-9 (ACCD) - Body ground	Output	GR - Body ground	ACC signal	20°C (68°F)	130.92 to 190.74 Ω	ACC Relay Monitor
G40-3 (IG1D) - Body ground	Output	LG - Body ground	IG signal	20°C (68°F)	87.32 to 127.14 Ω	IG Relay Monitor (Outside)
G40-4 (CUTB) - G41-11 (E)	Input	V - W-B	Dark current cut pin*1	Power switch off	11 to 14 V	-
G41-5 (SPD) - Body ground	Input	L - Body ground	Vehicle speed signal	Always	30 kΩ or higher	Vehicle Speed Signal

*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 set 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 electric waves every 0.25 seconds that form the detection area stops).

Reconnect the G40 and G41 certification ECU (smart key ECU assembly) connectors.

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

Tester Connection	Input/Output	Wiring Color	Terminal Description	Condition	Specified Condition	Related Data List Item
G40-2 (STP1) - G41-11 (E)	Input	W - W-B	Stop light switch signal	Brake pedal released → Brake pedal depressed	1 V or less → 9 V or higher	Stop Light Switch1
G41-22 (PPOS) - G41-11 (E)	Input	L - W-B	P position signal	P position signal Power switch on (ACC) → Power switch on (IG)	Pulse generation (See waveform 1)	-
G41-18 (SSW2) - G41-11 (E)	Input	V - W-B	SSW2 contact signal HINT: Backup for SSW1. Behaves the same way as SSW1.	Power switch not pushed → Power switch pushed	9 V or higher → 1 V or less	Start Switch2
G41-16 (SSW1) - G41-11 (E)	Input	L - W-B	SSW1 contact signal	Power switch not pushed → Power switch pushed	9 V or higher → 1 V or less	Start Switch1
G41-9 (ACCD) - G41-11 (E)	Output	GR - W-B	ACC signal	Power switch off → Power switch on (ACC)	1 V or less → 8.5 V or higher	ACC Relay Monitor
G40-3 (IG1D) - G41-11 (E)	Output	LG - W-B	IG signal	Power switch on (ACC) → Power switch on (IG)	1 V or less → 9 V or higher	IG Relay Monitor (Outside)
G41-5 (SPD) - G41-11 (E)	Input	L - W-B	Vehicle speed signal	Vehicle being driven at approx. 5 km/h (3 mph)	Pulse generation (See waveform 2)	Vehicle Speed Signal
G40-12 (ST2) - G41-11 (E)	Output	L - W-B	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	9 V or higher → 1 V or less	-

Using an oscilloscope, check the waveform of the ECU.

NOTE:

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

Waveform 1

Waveform 2

Item	Content
Tester Connection	G41-5 (SPD) - G41-11 (E)
Tool Setting	5 V/DIV., 200 ms./DIV.
Condition	Vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.