Toyota Fortuner. Meter / Gauge System Terminals Of Ecu

CHECK COMBINATION METER ASSEMBLY

CHECK ACCESSORY METER ASSEMBLY (MULTI-DISPLAY)

Meter / Gauge System -- Terminals Of Ecu

CHECK COMBINATION METER ASSEMBLY

Disconnect the C10 and C11 meter connectors.

Measure the voltage and resistance of the wire harness side connectors.

Terminal No.	Wiring Color	Terminal Description	Condition	Specified Condition
C10-1 - Body ground	R - Body ground	Battery	Always	10 to 14 V
C10-21 - C10-22	B-O - Y	Ignition signal	Ignition switch ON	10 to 14 V
C10-21 - C10-22	B-O - Y	Ignition signal	Ignition switch OFF	Below 1 V
C11-11 - Body ground*	B-R - Body ground	Power supply for fuel consumption calculation	Ignition switch ON	10 to 14 V
C11-11 - Body ground*	B-R - Body ground	Power supply for fuel consumption calculation	Ignition switch OFF	Below 1 V
C10-22 - Body ground	Y - Body ground	Ground	Always	Below 1 Ω
C10-9 - Body ground	W-G - Body ground	Rheostat signal	Rheostat knob fully turned to left position	702 Ω
C10-9 - Body ground	W-G - Body ground	Rheostat signal	Rheostat knob fully turned to right position	Below 1 Ω

HINT:

*: 1GR-FE

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the C10 and C11 meter connectors.

Measure the voltage of the connectors.

Terminal No.	Wiring Color	Terminal Description	Condition	Specified Condition
C10-2 - C10-3	BR - BR-Y	Fuel level signal	Ignition switch ON, fuel level F	Below 1 V
			Ignition switch ON, fuel level E	4 to 7 V
C10-5 - Body ground	P-L - Body ground	Vehicle speed signal (input)	Ignition switch ON, slowly turn wheel	Pulse generation (see waveform 1)
C10-6 - Body ground	V-R - Body ground	Vehicle speed signal (output)	Vehicle is driven	Pulse generation (see waveform 1)
C10-7 - Body ground	B-W - Body ground	Water temperature signal	Engine running	Pulse generation (see waveform 2)
C10-8 - C10-22	G - Y	Light control switch signal	Light control switch is OFF	Below 1 V
			Light control switch is TAIL or HEAD	10 to 14 V
C10-10 - Body ground	G-Y - Body ground	Unlock warning switch signal	No key in ignition key cylinder	Below 1 V
			Ignition switch OFF, key is in ignition key cylinder	10 to 14 V
C10-11 - Body ground	R-Y - Body ground	Driver side seat belt warning signal	Ignition switch ON, driver side seat belt unfastened	Below 1 V
			Ignition switch ON, driver side seat belt fastened	10 to 14 V
C10-12 - C10-13*1	G-B - W-G	Unengaged park warning signal	Ignition switch ON, A/T shift lever on P, transfer shift lever not on P	10 to 14 V
			Ignition switch ON, A/T shift lever on P, transfer shift lever on P	Below 1 V
C10-14 - Body ground*2	W-G - Body ground	Fuel filter warning signal	Ignition switch ON, fuel system warning light OFF	Below 1 V
			Ignition switch ON, fuel system warning light ON	10 to 14 V
C10-15 - Body ground	R-B - Body ground	Driver side door signal (output)	Driver side door is closed	Below 1 V
			Driver side door is open	10 to 14 V
C10-16 - Body ground	R-B - Body ground	Driver side door signal (input)	Driver side door is closed	Below 1 V
			Driver side door is open	10 to 14 V
C10-17 - Body ground	R-L - Body ground	Door signal	All doors are closed	Below 1 V
			All doors are open	10 to 14 V
C10-18 - Body ground*1	P - Body ground	ATF temperature warning signal	Ignition switch ON, ATF temperature warning light ON	Below 1 V
			Ignition switch ON, ATF temperature warning light OFF	10 to 14 V
C10-20 - Body ground	B-Y - Body ground	SRS warning light signal	Ignition switch ON, SRS warning light OFF	Pulse generation (see waveform 3)
			Ignition switch ON, SRS warning light ON	Pulse generation (see waveform 4)
C10-23 - Body ground*2	L-R - Body ground	Sedimenter warning signal	Ignition switch ON, fuel system warning light OFF	Below 1 V
			Ignition switch ON, fuel system warning light ON	10 to 14 V
C10-24 - C10-22	G-B - Y	Turn signal indicator LH signal	Ignition switch ON, turn signal indicator LH light OFF	Below 1 V
			Ignition switch ON, turn signal indicator LH light ON	10 to 14 V
C10-25 - C10-22	G-Y - Y	Turn signal indicator RH signal	Ignition switch ON, turn signal indicator RH light OFF	Below 1 V
			Ignition switch ON, turn signal indicator RH light ON	10 to 14 V
C10-27 - Body ground	R-Y - Body ground	HI BEAM indicator signal	HI BEAM indicator light OFF	10 to 14 V
			HI BEAM indicator light ON	Below 1 V
C10-28 - Body ground*3	L-B - Body ground	Cruise indicator signal	Ignition switch ON, cruise control main switch OFF	10 to 14 V
			Ignition switch ON, cruise control main switch ON	Below 1 V
C10-30 - Body ground	G-B - Body ground	Front fog indicator signal	Front fog light ON	10 to 14 V
			Front fog light OFF	Below 1 V
C10-31 - Body ground	R-B - Body ground	Center diff. lock indicator signal	Ignition switch ON, transfer shift lever on H4 or L4	10 to 14 V
			Ignition switch ON, transfer shift lever in position other than H4 or L4	Below 1 V
C10-33 - Body ground	B - Body ground	Rear diff. lock indicator signal	Ignition switch ON, transfer indicator switch ON	Below 1 V
			Ignition switch ON, transfer indicator switch OFF	10 to 14 V
C10-35 - Body ground	LG-B - Body ground	Oil pressure warning signal	Ignition switch ON, oil pressure warning light OFF	10 to 14 V
			Ignition switch ON, oil pressure warning light ON	Below 1 V
C10-36 - Body ground	LG - Body ground	Brake warning signal	Ignition switch ON, brake warning light OFF	10 to 14 V
			Ignition switch ON, brake warning light ON	Below 1 V
C10-37 - Body ground	GR - Body ground	Charge warning signal	Ignition switch ON, charge warning light OFF	10 to 14 V
			Ignition switch ON, charge warning light ON	Below 1 V
C10-38 - Body ground	R-G - Body ground	ABS warning indicator	Ignition switch ON, ABS warning light OFF	10 to 14 V
			Ignition switch ON, ABS warning light ON	Below 1 V
C10-39 - Body ground	R-B - Body ground	MIL signal	Ignition switch ON, MIL OFF	10 to 14 V
			Ignition switch ON, MIL ON	Below 1 V
C10-40 - Body ground*2	Y-R - Body ground	Glow indicator signal	Ignition switch ON, Glow indicator light OFF	10 to 14 V
			Ignition switch ON, Glow indicator light ON	Below 1 V
C11-1 - Body ground*4	GR-L - Body ground	A/T shift position signal (L)	Ignition switch ON, A/T L indicator light OFF	Below 1 V
			Ignition switch ON, A/T L indicator light ON	10 to 14 V
C11-2 - Body ground*4	P-L - Body ground	A/T shift position signal (2)	Ignition switch ON, A/T 2 indicator light OFF	Below 1 V
			Ignition switch ON, A/T 2 indicator light ON	10 to 14 V
C11-3 - Body ground*4	L - Body ground	A/T shift position signal (3)	Ignition switch ON, A/T 3 indicator light OFF	Below 1 V
			Ignition switch ON, A/T 3 indicator light ON	10 to 14 V
C11-4 - Body ground*4	G-O - Body ground	A/T shift position signal (4)	Ignition switch ON, A/T 4 indicator light OFF	Below 1 V
			Ignition switch ON, A/T 4 indicator light ON	10 to 14 V
C11-5 - Body ground*4	B-R - Body ground	A/T shift position signal (D)	Ignition switch ON, A/T D indicator light OFF	Below 1 V
			Ignition switch ON, A/T D indicator light ON	10 to 14 V
C11-6 - Body ground*4	R-W - Body ground	A/T shift position signal (N)	Ignition switch ON, A/T N indicator light OFF	Below 1 V
			Ignition switch ON, A/T N indicator light ON	10 to 14 V
C11-9 - Body ground*2	G-B - Body ground	Signal for amount of fuel consumption	Engine running	Pulse generation
C11-10 - Body ground*5	L - Body ground	Injector signal	Engine running	Pulse generation
C11-14 - Body ground*4	R-Y - Body ground	A/T shift position signal (R)	Ignition switch ON, A/T R indicator light OFF	Below 1 V
			Ignition switch ON, A/T R indicator light ON	10 to 14 V

HINT:

*1: 4WD (A/T)

*2: 1KD-FTV

*3: w/ Cruise control system

*4: w/ A/T shift indicator light

*5: 1GR-FE

If the result is not as specified, the combination meter may be malfunctioning.

Using an oscilloscope, check the signal waveform of the meter.
Waveform 1 (Reference)
Item
Content
Terminal No.
C10-5 - Body ground
C10-6 - Body ground
Tool Setting
5 V/DIV., 10 msec./DIV.
Vehicle Condition
Driving at approx. 20 km/h (12 mph)
HINT:
As vehicle speed increases, the wavelength shortens.

Using an oscilloscope, check the signal waveform of the meter.
Waveform 2 (Reference)
Item
Content
Terminal No.
C10-7 - Body ground
Tool Setting
5 V/DIV., 10 msec./DIV.
Vehicle Condition
Engine idling
HINT:
As vehicle speed increases, the wavelength shortens.

Using an oscilloscope, check the signal waveform of the meter.
Waveform 3 (Reference)
Item
Content
Terminal No.
C10-20 - Body ground
Tool Setting
5 V/DIV., 50 msec./DIV.
Vehicle Condition
Ignition switch ON, SRS warning light OFF

Using an oscilloscope, check the signal waveform of the meter.
Waveform 4 (Reference)
Item
Content
Terminal No.
C10-20 - Body ground
Tool Setting
5 V/DIV., 50 msec./DIV.
Vehicle Condition
Ignition switch ON, SRS warning light ON

Waveform 1 (Reference)
Item	Content
Terminal No.	C10-5 - Body ground C10-6 - Body ground
Tool Setting	5 V/DIV., 10 msec./DIV.
Vehicle Condition	Driving at approx. 20 km/h (12 mph)

Waveform 2 (Reference)
Item	Content
Terminal No.	C10-7 - Body ground
Tool Setting	5 V/DIV., 10 msec./DIV.
Vehicle Condition	Engine idling

Waveform 3 (Reference)
Item	Content
Terminal No.	C10-20 - Body ground
Tool Setting	5 V/DIV., 50 msec./DIV.
Vehicle Condition	Ignition switch ON, SRS warning light OFF

Waveform 4 (Reference)
Item	Content
Terminal No.	C10-20 - Body ground
Tool Setting	5 V/DIV., 50 msec./DIV.
Vehicle Condition	Ignition switch ON, SRS warning light ON

CHECK ACCESSORY METER ASSEMBLY (MULTI-DISPLAY)

Disconnect the A23 meter connector.

Measure the voltage and resistance of the wire harness side connector.

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
+B (A23-14) - Body ground	R - Body ground	+B power supply	Always	10 to 14 V
IG (A23-12) - Body ground	R-B - Body ground	IG power supply	Ignition switch ON	10 to 14 V
IG (A23-12) - Body ground	R-B - Body ground	IG power supply	Ignition switch OFF	Below 1 V
ACC (A23-13) - Body ground	G-R - Body ground	ACC power supply	Ignition switch ACC	10 to 14 V
ACC (A23-13) - Body ground	G-R - Body ground	ACC power supply	Ignition switch OFF	Below 1 V
GND1 (A23-1) - Body ground	LG - Body ground	Ground	Always	Below 1 Ω
SGND (A23-10) - Body ground	BR - Body ground	Ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

Reconnect the A23 meter connector.

Measure the voltage of the connector.

Symbols (Terminal No.)	Wiring Color	Terminal Description	Condition	Specified Condition
SG (A23-2) - TH+ (A23-3)	BR-Y - W-G	A/C ambient temperature sensor signal	Ignition switch ON, ambient temperature 25°C (77°F)	1.35 to 1.75 V
			Ignition switch ON, ambient temperature 40°C (104°F)	0.85 to 2.34 V
TAIL (A23-6) - Body ground	G - Body ground	Illumination signal	Ignition switch ON, light control switch OFF	Below 1 V
			Ignition switch ON, light control switch ON	10 to 14 V

If the result is not as specified, the accessory meter may be malfunctioning.

Table of Terminal Connection
Terminal No.		Wire Harness Side
C10	1	DOME Fuse
	2	Fuel Suction with Pump and Gauge Tube Assembly
	3	Fuel Suction with Pump and Gauge Tube Assembly
	4	ECM
	5	Vehicle Speed Sensor
	6	4 Pulse Output
	7	ECM
	8	Headlight Dimmer Switch
	9	Light Control Rheostat
	10	Unlock Warning Switch
	11	Front Seat Inner Belt RH
	12	PNP Switch*1
	13	Transfer Neutral Detection Switch*2
	14	Fuel Filter (Fuel Filter Switch)*3
	15	Integration Relay
	16	Front Door Courtesy Light Switch RH
	17	Door Courtesy Light Switch
	18	ECM
	19	-
	20	Center Airbag Sensor
	21	MET Fuse
	22	Body Ground
	23	Fuel Filter (Fuel Sedimenter Switch)*3
	24	Turn Signal Flasher Relay
	25	Turn Signal Flasher Relay
	26	-
	27	Headlight Dimmer Switch
	28	ECM*4
	29	-
	30	Front Fog Light Switch
	31	Transfer Indicator Switch
	32	-
	33	4WD Control ECU*5
	34	Engine Oil Level Sensor*3
	35	Oil Pressure Switch
	36	Parking Brake Switch Brake Fluid Level Warning Switch Vacuum Warning Switch*3
	37	Generator Assembly
	38	Skid Control ECU with Actuator
	39	ECM (MIL)
	40	ECM (GLOW)*3
C11	1	Shift Lock Control ECU*1
	2	Shift Lock Control ECU*1
	3	PNP Switch*1
	4	Shift Lock Control ECU*1
	5	Shift Lock Control ECU*1
	6	PNP Switch*1
	7	-
	8	-
	9	ECM*6
	10	Fuel Injector Assembly*6
	11	INJ Fuse
	12	Accessory Meter (Multi-display)
	13	Accessory Meter (Multi-display)
	14	PNP Switch*1
	15	-
	16	-

HINT:

*1: A/T

*2: 4WD (A/T)

*3: 1KD-FTV

*4: w/ Cruise control system

*5: w/ Rear differential lock system

*6: 1GR-FE