Terminals Of Ecu [07/2015 - ]

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Fig 1: Identifying Certification ECU (Smart Key ECU Assembly) Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the H57 and A70 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
A70-9 (IG2D) - Body ground	Output	R - Body ground	IG2 signal	20°C (68°F)	Approximetely310.14Ω	IG2 Relay Monitor(Outside)
A70-18 (STP1) - Body ground	Input	V - Body ground	Stop light switch signal	Brake pedal depressed → Brake pedal released	9 V or higher → 1 V or less	Stop Light Switch1
A70-2 (+B) - A70-11(E)	Input	W - W-B	Power source	Always	11 to 14 V	-
H57-26 (SLP) - A70-11(E)	Input	P - W-B	Steering lock position signal	Always	10 kΩ or higher	Steering Unlock Switch
A70-11 (E) - Body ground	-	W-B - Body ground	GND	Always	Below 1 Ω	-
H57-30 (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 1 Ω → 10 kΩ or higher	Start Switch2
H57-28 (SSW1) - Body ground	Input	LG - Body ground	SSW1 contact signal	Power switch pushed → Power switch not pushed	Below 1 Ω → 10 kΩ or higher	Start Switch1
H57-6 (IG1D) - Body ground	Output	L - Body ground	IG1 signal	20°C (68°F)	91.28 to 136.93 Ω	IG1 Relay Monitor(Outside)
H57-4 (ACCD) - Body ground	Output	W - Body ground	ACC signal	20°C (68°F)	125.95 to 188.93 Ω	ACC Relay Monitor
A70-10 (CUTB) - A70-11 (E)	Input	L - W-B	Stand-by power*	Always	11 to 14 V	-
H57-27 (SPD) - Body ground	Input	W - Body ground	Vehicle speed signal	Always	30 kΩ or higher	Vehicle Speed Signal

Reconnect the H57 and A70 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
A70-7 (ST2) - A70-11 (E)	Output	V - 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	-
A70-9 (IG2D) - A70-11 (E)	Output	R - W-B	IG2 signal	Power switch on (ACC) → Power switch on (IG)	1 V or less → 9 V or higher	IG2 Relay Monitor(Outside)
A70-18 (STP1) - A70-11 (E)	Input	V - W-B	Stop light switch signal	Brake pedal released → Brake pedal depressed	1 V or less → 9 V or higher	Stop Light Switch1
H57-26 (SLP) - A70-11 (E)	Input	P - W-B	Steering lock position signal	Steering locked → Steering unlocked*2	11 to 14 V → 1.2 V or less	Steering Unlock Switch
H57-29 (SLR+) - A70-11 (E)	Output	L - W-B	Steering lock motor operation command signal (Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))	Steering lock motor stopped → Steering lock motor operating → Steering lock motor stopped*3	Pulse generation (See waveform 1)	-
H57-25 (P) - A70-11 (E)	Input	L - W-B	P position signal	Shift lever in P → Shift lever not in P	9 V or higher → 1.5 V or less	Shift P Signal
H57-30 (SSW2) - A70-11 (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
H57-28 (SSW1) - A70-11 (E)	Input	LG - W-B	SSW1 contact signal	Power switch not pushed → Power switch pushed	9 V or higher → 1 V or less	Start Switch1
H57-4 (ACCD) - A70-11 (E)	Output	W - W-B	ACC signal	Power switch off → Power switch on (ACC)	1 V or less → 8.5 V or higher	ACC Relay Monitor
H57-6 (IG1D) - A70-11 (E)	Output	L - W-B	IG1 signal	Power switch on (ACC) → Power switch on (IG)	1 V or less → 9 V or higher	IG1 Relay Monitor(Outside)
H57-27 (SPD) - A70-11 (E)	Input	W - W-B	Vehicle speed signal	Vehicle being driven at approx. 5 km/h (3 mph)	Pulse generation (See waveform 2)	Vehicle Speed Signal

HINT:

*1: While the engine is cracking, the battery voltage may drop to approximately 6 V.
*2: When the power switch is turned off with the shift lever in P and any of the doors are opened or closed, the steering will be locked. When the power switch is turned on (ACC) or on (IG), the steering will be unlocked.
*3: When all of the following conditions are met, open any of the doors to operate the steering lock motor.
- The shift lever is in P.
- The power switch is off.
- While the electrical key transmitter sub-assembly is being carried, the power switch is turned on (IG) and the steering is unlocked.

Using an oscilloscope, check the waveform of the ECU.

Waveform 1

Fig 2: Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Item	Content
Tester Connection	H57-29 (SLR+) - A70-11 (E)
Tool Setting	2 V/DIV., 200 ms./DIV.
Condition	Steering lock motor stopped → Steering lock motor operating → Steering lock motor stopped

TEXT IN ILLUSTRATION

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

HINT:

When all of the following conditions are met, open any of the doors to operate the steering lock motor.

The shift lever is in P.
The power switch is off.
While the electrical key transmitter sub-assembly is being carried, the power switch is turned on (IG) and the steering is unlocked.

Waveform 2

Fig 3: Waveform 2

Item	Content
Tester Connection	H57-27 (SPD) - A70-11 (E)
Tool Setting	5 V/DIV., 100ms./DIV.
Condition	Power switch on (READY), vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

CHECK HYBRID VEHICLE CONTROL ECU
Refer to TERMINALS OF ECU [07/2015 - ]