Terminals Of Ecu [07/2022 - ]

COMBINATION METER ASSEMBLY

Fig 1: Combination Meter Assembly Connector End View

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

Terminal No. (Symbol)	Wiring Color	Terminal Description	Signal Input/Output	Condition	Specified Condition
F23-2 (MSM+) - Body ground	LG - Body ground	Steering pad switch assembly signal	Input	Ignition switch ON, OK and back switches on steering pad switch assembly not pushed	4.8 to 5.2 V
F23-3 (MSTI) - Body ground	V - Body ground	Steering pad switch assembly signal	Input	Ignition switch ON, up, down, right and left switches on steering pad switch assembly not pushed	4.8 to 5.2 V
F23-4 (ODO) - Body ground	SB - Body ground	ODO/TRIP switch signal	Input	Ignition switch ON, ODO/TRIP switch (trip switch) not pushed	11 to 14 V
F23-7 (TX-)	GR	Local bus communication line	Input/Output	-	-
F23-8 (TX+)	V	Local bus communication line	Input/Output	-	-
F23-9 (E3) - Body ground	W-B - Body ground	Ground	-	Always	Below 1 Ω
F23-11 (LST1) - Body ground	R - Body ground	Fuel lid operation signal	Input	"Refuel Ready" displayed on multi-information display	Pulse generation (See waveform 4)
				"Close Fuel Lid" displayed on multi-information display	Pulse generation (See waveform 5)
				"Please Wait Now Opening" displayed on multi- information display	Pulse generation (See waveform 6)
				Ignition switch ON	11 to 14 V
F23-12 (RRSB) - Body ground	P - Body ground	Rear seat belt buckle switch RH signal	Input	Rear right seat belt warning light off → on	11 to 14 V → Below 1 V
F23-13 (RCSB) - Body ground	W - Body ground	Rear seat belt buckle switch center signal	Input	Rear center seat belt warning light off → on	11 to 14 V → Below 1 V
F23-14 (RLSB) - Body ground	GR - Body ground	Rear seat belt buckle switch LH signal	Input	Rear left seat belt warning light off → on	11 to 14 V → Below 1 V
F23-15 (OILW) - Body ground	W - Body ground	Engine oil level signal	Input	Ignition switch ON, engine oil level not low → low	11 to 14 V → Below 1 V
F23-16 (WLVL) - Body ground	BE - Body ground	Washer fluid level signal	Input	Ignition switch ON, washer fluid level not low → low	11 to 14 V → Below 1 V
F23-19 (+S) - Body ground	B - Body ground	Speed signal for other systems (Output)	Output	Ignition switch ON, wheel being rotated	Pulse generation (See waveform 1)
F23-20 (SI) - Body ground	G - Body ground	Speed signal for other systems (Input)	Input	Ignition switch ON, wheel being rotated	Pulse generation (See waveform 1)
F23-21 (IG+) - Body ground	GR - Body ground	Ignition switch signal	-	Ignition switch off → Ignition switch ON	Below 1 V → 11 to 14 V
F23-22 (B) - Body ground	L - Body ground	Auxiliary Battery	-	Ignition switch off	11 to 14 V
F23-25 (TR) - Body ground	BE - Body ground	Light control rheostat switch signal	Input	Ignition switch ON, light control rheostat up switch (trip switch) and light control rheostat down switch (trip switch) not pushed	11 to 14 V
F23-26 (SW3) - Body ground	R - Body ground	Ground for trip switch	-	Always	Below 1 Ω
F23-29 (CANH)	P	CAN communication line	Input/Output	-	-
F23-30 (CANL)	W	CAN communication line	Input/Output	-	-
F23-31 (ES) - Body ground	W-B - Body ground	Ground	-	Always	Below 1 Ω
F23-33 (FR) - F23-32 (FE)	LG - B	Fuel level signal	Input	Ignition switch ON, fuel level full → Fuel level low (fuel level warning light on)	Pulse generation (See waveform 2)
F23-34 (FV) - Body ground	V - Body ground	Fuel sender gauge (Power source)	Output	Ignition switch ON	Pulse generation (See waveform 3)
F23-38 (IL2-) - Body ground	W - Body ground	Illumination signal	Output	Taillights off → on	Below 1 V → Pulse generation
F23-39 (ILL-) - Body ground	L - Body ground	Illumination signal	Output	Taillights off → on	Below 1 V → Pulse generation
F23-40 (EP) - Body ground	W-B - Body ground	Ground	-	Always	Below 1 Ω
F24-1 (B) - Body ground	LG - Body ground	Auxiliary Battery	-	Ignition switch off	11 to 14 V
F24-2 (HZSW) - Body ground	GR - Body ground	Hazard warning switch signal	Input	Hazard warning signal switch assembly off → Hazard warning signal switch assembly pushed	11 to 14 V → Below 1 V
F24-5 (TRNR) - Body ground	R - Body ground	Rear turn signal light RH signal	Output	RH turn indicator light off → RH turn indicator light blinking	Below 1 V → 11 to 14 V ←→ Below 1 V
F24-6 (INT) - Body ground	B - Body ground	Electrical key and tire pressure monitoring system receiver assembly signal	Output	Ignition switch ON, OK switch on steering pad switch not pushed	8 to 15 V
F24-7 (LR) - Body ground	W - Body ground	Front turn signal light RH signal	Output	RH turn indicator light off → blinking	Below 1 V → 11 to 14 V ←→ Below 1 V
F24-11 (TRNL) - Body ground	P - Body ground	Rear turn signal light LH signal	Output	LH turn indicator light off → blinking	Below 1 V → 11 to 14 V ←→ Below 1 V
F24-12 (HAZM) - Body ground	SB - Body ground	Hazard warning indicator light signal	Input	Ignition switch ON, LH turn indicator light blinking → Hazard warning signal switch assembly pushed	Below 1 V → 11 to 14 V ←→ Below 1 V
F24-13 (LL) - Body ground	V - Body ground	Front turn signal light LH signal	Output	LH turn indicator light off → blinking	Below 1 V → 11 to 14 V ←→ Below 1 V

Waveform 1:

Item	Condition
Tester connection	F23-20 (SI) - Body ground F23-19 (+S) - Body ground
Tool setting	5 V/DIV., 20 ms./DIV.
Condition	Ignition switch ON, wheel being rotated

Fig 2: Waveform 1

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

Waveform 2:

Item	Condition
Tester connection	F23-33 (FR) - F23-32 (FE)
Tool setting	2.5 V/DIV., 20 ms./DIV.
Condition	Ignition switch ON, fuel level full → low (fuel level warning light on)

Fig 3: Waveform 2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

(A) varies depending on the fuel level.
Ignition switch ON, fuel level full (4.1 to 4.6 V) → Fuel level low (fuel level warning light on) (0.3 to 1.1 V)

Waveform 3:

Item	Condition
Tester connection	F23-34 (FV) - Body ground
Tool setting	2.5 V/DIV., 20 ms./DIV.
Condition	Ignition switch ON

Fig 4: Waveform 3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT:

Ignition switch ON (4.5 to 5.5 V)

Waveform 4:

Item	Condition
Tester Connection	F23-11 (LST1) - Body ground
Tool setting	5 V/DIV., 20 ms./DIV.
Condition	"Refuel Ready" displayed on multi-information display

Fig 5: Waveform 4

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Waveform 5:

Item	Condition
Tester Connection	F23-11 (LST1) - Body ground
Tool setting	5 V/DIV., 20 ms./DIV.
Condition	"Close Fuel Lid" displayed on multi-information display

Fig 6: Waveform 5

HINT:

This waveform is output when the fuel lid opener switch is operated if the fuel lid is open and any of the following conditions are met:

The vehicle has been driven for 1 km (0.6 mile) or more at a speed of 50 km/h (31 mph) or more.
30 minutes or more have elapsed since the fuel lid opener switch was operated.

Waveform 6:

Item	Condition
Tester Connection	F23-11 (LST1) - Body ground
Tool setting	5 V/DIV., 20 ms./DIV.
Condition	"Please Wait Now Opening" displayed on multi-information display

Fig 7: Waveform 6

HINT:

This waveform is output when the internal pressure of the fuel tank is higher than the ambient pressure when the fuel lid opener switch is operated.