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HOMESERVICE MANUALSINFINITI2019Q70 3.7 LUXE, AWDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM (3.7L) (2 OF 2)ECU DIAGNOSIS INFORMATIONECMREFERENCE VALUEPHYSICAL VALUES

2019 Infiniti Q70 3.7 Luxe, AWD

Physical Values

2019 Infiniti Q70 3.7 Luxe, AWDSECTION Physical Values

NOTE:

ECM is located behind the instrument assist lower panel. For this inspection, remove passenger side instrument lower panel.
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT.

Terminal No. (Wire color)		Description		Condition	Value (Approx.)
+	--	Signal name	Input/Output	Condition	Value (Approx.)
1 (BR)	149 (B)	Throttle control motor (Close) (bank 1)	Output	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: In the middle of releasing operation	0 - 14 V Courtesy of NISSAN NORTH AMERICA, INC.
2 (R)	149 (B)	Throttle control motor power supply	Input	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14 V)
3 (G)	149 (B)	Throttle control motor (Open) (bank 1)	Output	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully depressed	0 - 14 V Courtesy of NISSAN NORTH AMERICA, INC.
3 (G)	149 (B)	Throttle control motor (Open) (bank 1)	Output	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully released	0 - 14 V Courtesy of NISSAN NORTH AMERICA, INC.
4 (B)	--	Sensor ground (Knock sensor)	--	--	--
5 (W)	149 (B)	Knock sensor (bank 1)	Input	[Engine is running] Idle speed	2.5 V* ¹
6 (W)	149 (B)	A/F sensor 1 heater (bank 1)	Output	[Engine is running] Warm-up condition Idle speed (More than 140 seconds after starting engine)	2.9 - 8.8 V Courtesy of NISSAN NORTH AMERICA, INC.
7 (P)	149 (B)	Heated oxygen sensor 2 heater (bank 1)	Output	[Engine is running] Engine speed: Below 3, 600 RPM after the following conditions are met Engine: after warming up Keeping the engine speed between 3, 500 and 4, 000 RPM for 1 minute and at idle for 1 minute under no load	10 V Courtesy of NISSAN NORTH AMERICA, INC.
7 (P)	149 (B)	Heated oxygen sensor 2 heater (bank 1)	Output	[Ignition switch: ON] Engine stopped [Engine is running] Engine speed: Above 3, 600 RPM	BATTERY VOLTAGE (11 - 14 V)
8 (O)	149 (B)	Throttle control motor relay	Output	[Ignition switch: ON -> OFF]	0 - 1.0 V BATTERY VOLTAGE (11 - 14 V) 0 V
8 (O)	149 (B)	Throttle control motor relay	Output	[Ignition switch: ON]	0 - 1.0 V
9 (GR)	149 (B)	Knock sensor (bank 2)	Input	[Engine is running] Idle speed	2.5 V* ¹
10 (B)	--	ECM ground	--	--	--
11 (R)	149 (B)	Fuel injector No. 5	Output	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	BATTERY VOLTAGE (11 - 14 V) Courtesy of NISSAN NORTH AMERICA, INC.
12 (O)		Fuel injector No. 4
16 (BR)		Fuel injector No. 2
17 (GR)		Fuel injector No. 1		[Engine is running] Warm-up condition Engine speed: 2, 000 RPM	BATTERY VOLTAGE (11 - 14 V) Courtesy of NISSAN NORTH AMERICA, INC.
21 (V)		Fuel injector No. 6
22 (Y)		Fuel injector No. 3
13 (G)	15 (B)	Engine oil temperature sensor	Input	[Engine is running]	0 - 4.8 V Output voltage varies with engine oil temperature.
15 (B)	--	Sensor ground [Engine oil temperature sensor, Manifold absolute pressure (MAP) sensor]	--	--	--
18 (G)	149 (B)	Sensor power supply [Refrigerant pressure sensor/Manifold absolute pressure (MAP) sensor/Power steering pressure sensor]	--	[Ignition switch: ON]	5 V
19 (B)	149 (B)	Fuel pump relay	Output	[Ignition switch: ON] For 1 second after turning ignition switch ON [Engine is running]	0 - 1.5 V
19 (B)	149 (B)	Fuel pump relay	Output	[Ignition switch: ON] More than 1 second after turning ignition switch ON	BATTERY VOLTAGE (11 - 14 V)
20 (LG)	25 (V)	Refrigerant pressure sensor	Input	[Engine is running] Warm-up condition Both A/C switch and blower fan motor switch: ON (Compressor operates)	1.0 - 4.0 V
24 (V)	25 (V)	Power steering pressure sensor	Output	[Engine is running] Steering wheel: Being turned	0.5 - 4.5 V
24 (V)	25 (V)	Power steering pressure sensor	Output	[Engine is running] Steering wheel: Not being turned	0.4 - 0.8 V
25 (V)	--	Sensor ground (Refrigerant pressure sensor, Power steering pressure sensor)	--	--	--
26 (R)	149 (B)	VVEL actuator motor relay abort signal [VVEL control module]	Output	[Engine is running] Warm-up condition Idle speed	0 V
28 (R)	149 (B)	Sensor power supply [Crankshaft position sensor (POS)]	--	[Ignition switch: ON]	5 V
31 (SB)	149 (B)	Engine coolant temperature sensor	Input	[Engine is running]	0 - 4.8 V Output voltage varies with engine coolant temperature.
32 (L)	149 (B)	Heated oxygen sensor 2 (bank 2)	Input	[Engine is running] Revving engine from idle to 3, 000 RPM quickly after the following conditions are met Engine: after warming up Keeping the engine speed between 3, 500 and 4, 000 RPM for 1 minute and at idle for 1 minute under no load	0 - 1.0 V
34 (Y)	149 (B)	Intake air temperature sensor (bank 1)	Input	[Engine is running]	0 - 4.8 V Output voltage varies with intake air temperature.
35 (B/W)	--	Sensor ground [Engine coolant temperature sensor, Heated oxygen sensor 2 (bank 1, 2)]	--	--	--
36 (L)	149 (B)	Crankshaft position sensor (POS)	Input	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	4.0 - 5.0 V Courtesy of NISSAN NORTH AMERICA, INC.
36 (L)	149 (B)	Crankshaft position sensor (POS)	Input	[Engine is running] Engine speed: 2, 000 RPM	4.0 - 5.0 V Courtesy of NISSAN NORTH AMERICA, INC.
38 (O)	40 (B)	Mass air flow sensor (bank 1)	Input	[Engine is running] Warm-up condition Idle speed	0.7 - 1.2 V
38 (O)	40 (B)	Mass air flow sensor (bank 1)	Input	[Engine is running] Warm-up condition Engine speed: 2, 500 RPM	1.3 - 1.7 V
40 (B)	--	Sensor ground [Crank shaft position sensor, Mass air flow sensor (bank 1, 2), Intake air temperature sensor]	--	--	--
41 (BR)	149 (B)	Heated oxygen sensor 2 (bank 1)	Input	[Engine is running] Revving engine from idle to 3, 000 RPM quickly after the following conditions are met Engine: after warming up Keeping the engine speed between 3, 500 and 4, 000 RPM for 1 minute and at idle for 1 minute under no load	0 - 1.0 V
42 (BR)	40 (B)	Mass air flow sensor (bank 2)	Input	[Engine is running] Warm-up condition Idle speed	0.7 - 1.2 V
42 (BR)	40 (B)	Mass air flow sensor (bank 2)	Input	[Engine is running] Warm-up condition Engine speed: 2, 500 RPM	1.3 - 1.7 V
44 (W)	15 (B)	Manifold absolute pressure (MAP) sensor	Input	[Engine is running] Warm-up condition Idle speed	1.2 V
44 (W)	15 (B)	Manifold absolute pressure (MAP) sensor	Input	[Engine is running] Warm-up condition Engine speed: 2, 000 RPM	1.5 V
46 (L)	149 (B)	A/F sensor 1 heater (bank 2)	Output	[Engine is running] Warm-up condition Idle speed (More than 140 seconds after starting engine)	2.9 - 8.8 V Courtesy of NISSAN NORTH AMERICA, INC.
47 (LG)	149 (B)	Heated oxygen sensor 2 heater (bank 2)	Output	[Engine is running] Engine speed: Below 3, 600 RPM after the following conditions are met Engine: after warming up Keeping the engine speed between 3, 500 and 4, 000 RPM for 1 minute and at idle for 1 minute under no load	10 V Courtesy of NISSAN NORTH AMERICA, INC.
47 (LG)	149 (B)	Heated oxygen sensor 2 heater (bank 2)	Output	[Ignition switch: ON] Engine stopped [Engine is running] Engine speed: Above 3, 600 RPM	BATTERY VOLTAGE (11 - 14 V)
52 (LG)	149 (B)	Throttle control motor (Open) (bank 2)	Output	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully depressed	0 - 14 V Courtesy of NISSAN NORTH AMERICA, INC.
52 (LG)	149 (B)	Throttle control motor (Open) (bank 2)	Output	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully released	0 - 14 V Courtesy of NISSAN NORTH AMERICA, INC.
53 (V)	149 (B)	Throttle control motor (Close) (bank 2)	Output	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: In the middle of releasing operation	0 - 14 V Courtesy of NISSAN NORTH AMERICA, INC.
54 (GR)	149 (B)	EVAP canister purge volume control solenoid valve	Output	[Engine is running] Idle speed Accelerator pedal: Not depressed even slightly, after engine starting	BATTERY VOLTAGE (11 - 14 V) Courtesy of NISSAN NORTH AMERICA, INC.
54 (GR)	149 (B)	EVAP canister purge volume control solenoid valve	Output	[Engine is running] Engine speed: About 2, 000 RPM (More than 100 seconds after starting engine)	BATTERY VOLTAGE (11 - 14 V) Courtesy of NISSAN NORTH AMERICA, INC.
55 (B)	--	ECM ground	--	--	--
64 (W)	--	Sensor ground (Battery current sensor)	--	--	--
66 (B/W)	149 (B)	A/F sensor 1 (bank 1)	Input	[Engine is running] Warm-up condition Engine speed: 2, 000 RPM	1.8 V Output voltage varies with air fuel ratio.
67 (L)	149 (B)	A/F sensor 1 (bank 1)	Input	[Ignition switch: ON]	2.2 V
68 (GR)	149 (B)	Battery temperature sensor	Input	[Engine is running] Battery: Fully charged* ² Idle speed	1.6 V
69 (G)	64 (W)	Battery current sensor	Input	[Engine is running] Battery: Fully charged* ² Idle speed	2.6 - 3.5 V
70 (B)	--	Shield	--	--	--
71 (O)	75 (O/L)	Throttle position sensor 1 (bank 1)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully released	More than 0.36 V
71 (O)	75 (O/L)	Throttle position sensor 1 (bank 1)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully depressed	Less than 4.75 V
72 (W/L)	75 (O/L)	Throttle position sensor 2 (bank 1)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully released	Less than 4.75 V
72 (W/L)	75 (O/L)	Throttle position sensor 2 (bank 1)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully depressed	More than 0.36 V
75 (O/L)	--	Sensor ground [Throttle position sensor (bank 1)]	--	--	--
76 (W/L)	149 (B)	A/F sensor 1 (bank 2)	Input	[Engine is running] Warm-up condition Engine speed: 2, 000 RPM	1.8 V Output voltage varies with air fuel ratio.
77 (L/O)	149 (B)	A/F sensor 1 (bank 2)	Input	[Ignition switch: ON]	2.2 V
80 (B)	--	Shield	--	--	--
81 (W)	95 (O)	Throttle position sensor 2 (bank 2)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully released	Less than 4.75 V
81 (W)	95 (O)	Throttle position sensor 2 (bank 2)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully depressed	More than 0.36 V
82 (O/L)	95 (O)	Throttle position sensor 1 (bank 2)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully released	More than 0.36 V
82 (O/L)	95 (O)	Throttle position sensor 1 (bank 2)	Input	[Ignition switch: ON] Engine stopped Selector lever: D Accelerator pedal: Fully depressed	Less than 4.75 V
83 (BR)	149 (B)	PNP signal	Input	[Ignition switch: ON] Selector lever: P or N	BATTERY VOLTAGE (11 - 14 V)
83 (BR)	149 (B)	PNP signal	Input	[Ignition switch: ON] Selector lever: Except above	0 V
84 (B)	149 (B)	Camshaft position sensor (PHASE) (bank 1)	Input	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	3.0 - 5.0 V Courtesy of NISSAN NORTH AMERICA, INC.
84 (B)	149 (B)	Camshaft position sensor (PHASE) (bank 1)	Input	[Engine is running] Engine speed: 2, 000 RPM	3.0 - 5.0 V Courtesy of NISSAN NORTH AMERICA, INC.
86 (V)	149 (B)	ECM relay (Self shut-off)	Output	[Engine is running] [Ignition switch: OFF] A few seconds after turning ignition switch OFF	0 - 1.5 V
86 (V)	149 (B)	ECM relay (Self shut-off)	Output	[Ignition switch: OFF] More than a few seconds after turning ignition switch OFF	BATTERY VOLTAGE (11 - 14 V)
87 (W/L)	95 (O)	Sensor power supply [Throttle position sensor (bank 2)]	--	[Ignition switch: ON]	5 V
89 (BR)	149 (B)	Camshaft position sensor (PHASE) (bank 2)	Input	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	3.0 - 5.0 V Courtesy of NISSAN NORTH AMERICA, INC.
89 (BR)	149 (B)	Camshaft position sensor (PHASE) (bank 2)	Input	[Engine is running] Engine speed: 2, 000 RPM	3.0 - 5.0 V Courtesy of NISSAN NORTH AMERICA, INC.
90 (R)	--	Sensor ground [Camshaft position sensor (PHASE) (bank 1, 2)]	--	--	--
92 (W)	149 (B)	Sensor power supply [Camshaft position sensor (PHASE) (bank 2), Battery current sensor]	--	[Ignition switch: ON]	5 V
95 (O)	--	Sensor ground [Throttle position sensor (bank 2)]	--	--	--
98 (W)	149 (B)	Sensor power supply [Camshaft position sensor (PHASE) (bank 1), Throttle position sensor (bank 1)]	--	[Ignition switch: ON]	5 V
103 (L)	149 (B)	Ignition signal No. 3	Output	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	0 - 0.2 V Courtesy of NISSAN NORTH AMERICA, INC.
104 (V)		Ignition signal No. 6
106 (G)		Ignition signal No. 2
107 (LG)		Ignition signal No. 5		[Engine is running] Warm-up condition Engine speed: 2, 000 RPM	0.1 - 0.4 V Courtesy of NISSAN NORTH AMERICA, INC.
113 (Y)		Ignition signal No. 1
114 (GR)		Ignition signal No. 4
110 (B)	--	ECM ground	--	--	--
116 (W)	149 (B)	Power supply for ECM (Back-up)	Input	[Ignition switch: OFF]	BATTERY VOLTAGE (11 - 14 V)
117 (Y)	149 (B)	Intake valve timing control solenoid valve (bank 1)	Output	[Engine is running] Warm-up condition Idle speed	BATTERY VOLTAGE (11 - 14 V)
117 (Y)	149 (B)	Intake valve timing control solenoid valve (bank 1)	Output	[Engine is running] Warm-up condition Engine speed: 2, 000rpm	7 - 12 V Courtesy of NISSAN NORTH AMERICA, INC.
119 (Y)	149 (B)	Intake valve timing control solenoid valve (bank 2)	Output	[Engine is running] Warm-up condition Idle speed	BATTERY VOLTAGE (11 - 14 V)
119 (Y)	149 (B)	Intake valve timing control solenoid valve (bank 2)	Output	[Engine is running] Warm-up condition Engine speed: 2, 000rpm	7 - 12 V Courtesy of NISSAN NORTH AMERICA, INC.
121 (P)	148 (V)	EVAP control system pressure sensor	Input	[Ignition switch: ON]	1.8 - 4.8 V
123 (P)	--	CAN communication line	Input/Output	--	--
124 (L)	--	CAN communication line	Input/Output	--	--
125 (BG)	25 (V)	Sensor power supply (Refrigerant pressure sensor)	--	[Ignition switch: ON]	5 V
126 (V)	149 (B)	Engine speed output signal	Output	[Engine is running] Warm-up condition Idle speed NOTE: The pulse cycle changes depending on RPM at idle	1 V Courtesy of NISSAN NORTH AMERICA, INC.
126 (V)	149 (B)	Engine speed output signal	Output	[Engine is running] Engine speed is 2, 000 RPM	1 V Courtesy of NISSAN NORTH AMERICA, INC.
128 (P)	149 (B)	Fuel tank temperature sensor	Input	[Engine is running]	0 - 4.8 V Output voltage varies with fuel tank temperature.
133 (G)	149 (B)	Ignition switch	Input	[Ignition switch: OFF]	0 V
133 (G)	149 (B)	Ignition switch	Input	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14 V)
134 (SB)	135 (Y)	ICC steering switch (models with ICC system)	Input	[Ignition switch: ON] ICC steering switch: OFF	4.2 V
				[Ignition switch: ON] MAIN switch: Pressed	0 V
				[Ignition switch: ON] DYNAMIC DRIVE ASSISTANCE SYSTEMS switch: Pressed	1.0 V
				[Ignition switch: ON] CANCEL switch: Pressed	1.9 V
				[Ignition switch: ON] RESUME/ACCELERATE switch: Pressed	3.7 V
				[Ignition switch: ON] SET/COAST switch: Pressed	3.2 V
				[Ignition switch: ON] DISTANCE switch: Pressed	2.6 V
		ASCD steering switch (models with ASCD system)	Input	[Ignition switch: ON] ASCD steering switch: OFF	4 V
				[Ignition switch: ON] MAIN switch: Pressed	0 V
				[Ignition switch: ON] CANCEL switch: Pressed	1 V
				[Ignition switch: ON] RESUME/ACCELERATE switch: Pressed	3 V
				[Ignition switch: ON] SET/COAST switch: Pressed	2 V
135 (Y)	--	Sensor ground (ASCD steering switch)	--	--	--
137 (L)	--	CAN communication line [VVEL control module]	Input/output	--	--
138 (Y)	--	CAN communication line [VVEL control module]	Input/output	--	--
139 (P)	149 (B)	Stop lamp switch	Input	[Ignition switch: OFF] Brake pedal: Fully released	0 V
139 (P)	149 (B)	Stop lamp switch	Input	[Ignition switch: OFF] Brake pedal: Slightly depressed	BATTERY VOLTAGE (11 - 14 V)
140 (BR)	149 (B)	ICC brake switch (models with ICC system) ASCD brake switch (models with ASCD system)	Input	[Ignition switch: ON] Brake pedal: Slightly depressed	0 V
140 (BR)	149 (B)		Input	[Ignition switch: ON] Brake pedal: Fully released	BATTERY VOLTAGE (11 - 14 V)
141 (G)	149 (B)	EVAP canister vent control valve	Output	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14 V)
142 (L)	144 (BR) ^3 (B) ^4	Sensor power supply (Accelerator pedal position sensor 2)	--	[Ignition switch: ON]	5 V
143 (Y)	144 (BR) ^3 (B) ^4	Accelerator pedal position sensor 2	Input	[Ignition switch: ON] Engine stopped Accelerator pedal: Fully released	0.25 - 0.50 V
143 (Y)	144 (BR) ^3 (B) ^4	Accelerator pedal position sensor 2	Input	[Ignition switch: ON] Engine stopped Accelerator pedal: Fully depressed	2.0 - 2.5 V
144 (BR) ^3 (B) ^4	--	Sensor ground (Accelerator pedal position sensor 2)	--	--	--
145 (SB)	149 (B)	Power supply for ECM	Input	[Ignition switch: ON]	BATTERY VOLTAGE (11 - 14 V)
146 (G)	151 (W)	Sensor power supply (Accelerator pedal position sensor 1)	--	[Ignition switch: ON]	5 V
147 (B)	--	ECM ground	--	--	--
148 (V)	--	Sensor ground (EVAP control system pressure sensor, Fuel tank temperature sensor)	--	--	--
149 (B)	--	ECM ground	--	--	--
150 (R)	151 (W)	Accelerator pedal position sensor 1	Input	[Ignition switch: ON] Engine stopped Accelerator pedal: Fully released	0.5 - 1.00 V
150 (R)	151 (W)	Accelerator pedal position sensor 1	Input	[Ignition switch: ON] Engine stopped Accelerator pedal: Fully depressed	4.2 - 4.8 V
151 (W)	--	Sensor ground (Accelerator pedal position sensor 1)	--	--	--
152 (B)	--	ECM ground	--	--	--