LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction And Symptom Diagnosis) >> Ecu Diagnosis Information >> ECM >> Reference Value >> Physical Values
April 5, 2026: LEMON Manuals is launched! Read the announcement.

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
1
(W)		 128
(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 VSTARF
STARFGNSJMBIA0030GB-030Courtesy of NISSAN NORTH AMERICA, INC.
2
(G)		 128
(B)		 Throttle Control Motor (Open) (Bank 1) Output [Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 0 - 14 VSTARF
STARFGNSJMBIA0031GB-031Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14 VSTARF
STARFGNSJMBIA0032GB-032Courtesy of NISSAN NORTH AMERICA, INC.
3
(R)		 128
(B)		 Throttle Control Motor Power Supply (Bank 1) Input [Ignition Switch: ON] BATTERY VOLTAGE
(11 - 14 V)
4
(BR)		 128
(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 VSTARF
STARFGNSJMBIA0033GB-033Courtesy of NISSAN NORTH AMERICA, INC.
5
(W)		 128
(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 VSTARF
STARFGNSJMBIA0030GB-030Courtesy of NISSAN NORTH AMERICA, INC.
8
(B)		 - ECM ground - - -
11
(GR)		 128
(B)		 Ignition signal No. 4 Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE:

    The pulse cycle changes depending on RPM at idle

 0 - 0.2 VSTARF
STARFG08435929Courtesy of NISSAN NORTH AMERICA, INC.
12
(L)		 Ignition signal No. 3
15
(V)		 Ignition signal No. 5
16
(G)		 Ignition signal No. 2 [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 0.1 - 0.4 VSTARF
STARFGNSJMBIA0036GB-036Courtesy of NISSAN NORTH AMERICA, INC.
19
(SB)		 Ignition signal No. 6
20
(Y)		 Ignition signal No. 1
17
(P)		 128
(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 VSTARF
STARFGNSJMBIA0037GB-037Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition Switch: ON]
  • Engine stopped

[Engine is running]
  • Engine speed: Above 3, 600 RPM
 BATTERY VOLTAGE
(11 - 14 V)
18
(W)		 128
(B)		 Intake Valve Timing Control Solenoid Valve (Bank 1) Output [Engine is running]
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 7 - 12 VSTARF
STARFGNSJMBIA0038GB-038Courtesy of NISSAN NORTH AMERICA, INC.
21
(GR)		 128
(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)STARF
STARFGNSJMBIA0039GB-039Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: About 2, 000 RPM (More than 100 seconds after starting engine)
 BATTERY VOLTAGE
(11 - 14 V)STARF
STARFGNSJMBIA0040GB-040Courtesy of NISSAN NORTH AMERICA, INC.
22
(R)		 128
(B)		 Fuel Pump Relay Output [Ignition Switch: ON]
  • For 1 second after turning Ignition Switch ON

[Engine is running]		 0 - 1.5 V
[Ignition Switch: ON]
  • More than 1 second after turning Ignition Switch ON
 BATTERY VOLTAGE
(11 - 14 V)
24
(P)		 128
(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
[Ignition Switch: OFF]
  • More than a few seconds after turning Ignition Switch OFF
 BATTERY VOLTAGE
(11 - 14 V)
25
(O)		 128
(B)		 Throttle Control Motor Relay Output [Ignition Switch: ON → OFF] 0 - 1.0 V
↓
BATTERY VOLTAGE
(11 - 14 V)
↓
0 V
[Ignition Switch: ON] 0 - 1.0 V
28
(BR)		 128
(B)		 VVEL Actuator Motor Relay abort signal
[VVEL Control Module]		 Output [Engine is running]
  • Warm-up condition
  • Idle speed
 0 V
29
(G)		 128
(B)		 Intake Valve Timing Control Solenoid Valve (Bank 2) Output [Engine is running]
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE
(11 - 14 V)
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 7 - 12 VSTARF
STARFGNSJMBIA0038GB-038Courtesy of NISSAN NORTH AMERICA, INC.
30
(Y)		 40
(R)		 Throttle Position Sensor 1 (Bank 1) Input [Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully released
 More than 0.36 V
[Ignition Switch: ON]
  • Engine stopped
  • Selector Lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully depressed
 Less than 4.75 V
31
(R)		 48
(B)		 Throttle Position Sensor 1 (Bank 2) Input [Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully released
 More than 0.36 V
[Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully depressed
 Less than 4.75 V
33
(SB)		 128
(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 VSTARF
STARFGNSJMBIA0037GB-037Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition Switch: ON]
  • Engine stopped

[Engine is running]
  • Engine speed: Above 3, 600 RPM
 BATTERY VOLTAGE
(11 - 14 V)
34
(B)		 40
(R)		 Throttle Position Sensor 2 (Bank 1) Input [Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully released
 Less than 4.75 V
[Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully depressed
 More than 0.36 V
35
(W)		 48
(B)		 Throttle Position Sensor 2 (Bank 2) Input [Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully released
 Less than 4.75 V
[Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D (A/T) or 1st (M/T)
  • Accelerator pedal: Fully depressed
 More than 0.36 V
37
(W)		 128
(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 VSTARF
STARFGNSJMBIA0041GB-041Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: 2, 000 RPM
 4.0 - 5.0 VSTARF
STARFGNSJMBIA0042GB-042Courtesy of NISSAN NORTH AMERICA, INC.
38
(O)		 96
(P)		 Manifold Absolute Pressure (MAP) Sensor Input [Engine is running]
  • Warm-up condition
  • Idle speed
 1.2 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 1.5 V
40
(R)		 - Sensor Ground
[Throttle Position Sensor (Bank 1)]		 - - -
43
(G)		 48
(B)		 Sensor Power Supply
[Throttle Position Sensor (Bank 2)]		 - [Ignition Switch: ON] 5 V
44
(L)		 40
(R)		 Sensor Power Supply
[Throttle Position Sensor (Bank 1)]		 - [Ignition Switch: ON] 5 V
46
(R)		 128
(B)		 Sensor Power Supply
[Crankshaft Position Sensor (POS)]		 - [Ignition Switch: ON] 5 V
47
(Y)		 - Sensor Ground
[Crankshaft Position Sensor (POS)]		 - - -
48
(B)		 - Sensor Ground
[Throttle Position Sensor (Bank 2)]		 - - -
49
(GR)		 128
(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 VSTARF
STARFGNSJMBIA0033GB-033Courtesy of NISSAN NORTH AMERICA, INC.
50
(V)		 128
(B)		 Throttle Control Motor (Open) (Bank 2) Output [Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 0 - 14 VSTARF
STARFGNSJMBIA0031GB-031Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition Switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14 VSTARF
STARFGNSJMBIA0032GB-032Courtesy of NISSAN NORTH AMERICA, INC.
52
(R)		 128
(B)		 Throttle Control Motor Power Supply (Bank 2) Input [Ignition Switch: ON] BATTERY VOLTAGE
(11 - 14 V)
53
(W)		 128
(B)		 Ignition Switch Input [Ignition Switch: OFF] 0 V
[Ignition Switch: ON] BATTERY VOLTAGE
(11 - 14 V)
54
(Y)		 - CAN Communication line
[VVEL Control Module]		 Input/output - -
55
(LG)		 - CAN Communication line
[VVEL Control Module]		 Input/Output - -
57
(L)		 128
(B)		 A/F Sensor 1 (Bank 1) Input [Ignition Switch: ON] 2.2 V
59
(O)		 128
(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 VSTARF
STARFGNSJMBIA0045GB-045Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: 2, 000 RPM
 3.0 - 5.0 VSTARF
STARFGNSJMBIA0046GB-046Courtesy of NISSAN NORTH AMERICA, INC.
60
(G)		 128
(B)		 Sensor Power Supply
[Camshaft Position Sensor (PHASE) (Bank 1), Manifold Absolute Pressure (MAP) Sensor, Power Steering Pressure Sensor]		 - [Ignition Switch: ON] 5 V
61
(R)		 128
(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.
63
(L)		 128
(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 VSTARF
STARFGNSJMBIA0045GB-045Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: 2, 000 RPM
 3.0 - 5.0 VSTARF
STARFGNSJMBIA0046GB-046Courtesy of NISSAN NORTH AMERICA, INC.
64
(SB)		 128
(B)		 Sensor Power Supply
[Camshaft Position Sensor (PHASE) (Bank 2), Battery Current Sensor]		 - [Ignition Switch: ON] 5 V
65
(LG)		 128
(B)		 A/F Sensor 1 (Bank 2) Input [Ignition Switch: ON] 2.2 V
66
(V)		 128
(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.
67
(P)		 128
(B)		 Intake Air Temperature Sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with intake air temperature.
68
(LG)		 - Sensor Ground
[Mass Air Flow Sensor (Bank 1), Intake Air Temperature Sensor]		 - - -
69
(W)		 128
(B)		 Knock Sensor (Bank 2) Input [Engine is running]
  • Idle Speed
 2.5 V*1
71
(Y)		 128
(B)		 Engine Coolant Temperature Sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with engine coolant temperature.
72
(Shield)		 - Sensor Ground
(Knock Sensor)		 - - -
73
(W)		 128
(B)		 Knock Sensor (Bank 1) Input [Engine is running]
  • Idle speed
 2.5 V*1
76
(W)		 84
(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
77
(SB)		 68
(LG)		 Mass Air Flow Sensor (Bank 1) Input [Engine is running]
  • Warm-up condition
  • Idle speed
 0.7 - 1.2 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 500 RPM
 1.3 - 1.7 V
78
(G)		 84
(B)		 Engine Oil Temperature Sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with engine oil temperature.
79
(BR)		 94
(Y)		 Mass Air Flow Sensor (Bank 2) Input [Engine is running]
  • Warm-up condition
  • Idle speed
 0.7 - 1.2 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 500 RPM
 1.3 - 1.7 V
80
(O)		 84
(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
81
(R)		 128
(B)		 Fuel Injector No. 3 Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE:

    The pulse cycle changes depending on RPM at idle

 BATTERY VOLTAGE
(11 - 14 V)STARF
STARFGNSJMBIA0047GB-047Courtesy of NISSAN NORTH AMERICA, INC.
82
(V)		 Fuel Injector No. 6
85
(BR)		 Fuel Injector No. 2
86
(W)		 Fuel Injector No. 5 [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE
(11 - 14 V)STARF
STARFGNSJMBIA0048GB-048Courtesy of NISSAN NORTH AMERICA, INC.
89
(GR)		 Fuel Injector No. 1
90
(O)		 Fuel Injector No. 4
84
(B)		 - Sensor Ground
(Heated Oxygen Sensor 2, Engine Coolant Temperature Sensor, Engine Oil Temperature Sensor)		 - - -
87
(Y)		 96
(P)		 Power Steering Pressure Sensor Output [Engine is running]
  • Steering wheel: Being turned
 0.5 - 4.5 V
[Engine is running]
  • Steering wheel: Not being turned
 0.4 - 0.8 V
91
(SB)		 95
(G)		 Battery Current Sensor Input [Engine is running]
  • Battery: Fully charged*2
  • Idle speed
 2.6 - 3.5 V
92
(G)		 - Sensor Ground
[Camshaft Position Sensor (PHASE) (Bank 2)]		 - - -
93
(P)		 128
(B)		 Power Supply for ECM (Back-up) Input [Ignition Switch: OFF] BATTERY VOLTAGE
(11 - 14 V)
94
(Y)		 - Sensor Ground
[Mass Air Flow Sensor (Bank 2)]		 - - -
95
(G)		 - Sensor Ground
(Battery Current Sensor)		 - - -
96
(P)		 - Sensor Ground
[Camshaft Position Sensor (PHASE) (Bank 1), Manifold Absolute Pressure (MAP) Sensor, Power Steering Pressure Sensor]		 - - -
97
(R)		 100
(W)		 Accelerator Pedal Position Sensor 1 Input [Ignition Switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully released
 0.45 - 1.00 V
[Ignition Switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully depressed
 4.2 - 4.8 V
98
(P)*3
(Y)*4		 104
(GR)*3
(BR)*4		 Accelerator Pedal Position Sensor 2 Input [Ignition Switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully released
 0.22 - 0.50 V
[Ignition Switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully depressed
 2.1 - 2.5 V
99
(L)*3
(G)*4		 100
(W)		 Sensor Power Supply
(Accelerator Pedal Position Sensor 1)		 - [Ignition Switch: ON] 5 V
100
(W)		 - Sensor Ground
(Accelerator Pedal Position Sensor 1)		 - - -
101
(SB)		 108
(V)		 ICC Steering Switch
(models with ICC System)		 Input [Ignition Switch: ON]
  • ICC Steering Switch: OFF
 4.3 V
[Ignition Switch: ON]
  • MAIN Switch: Pressed
 0 V
[Ignition Switch: ON]
  • CANCEL Switch: Pressed
 1.3 V
[Ignition Switch: ON]
  • RESUME/ACCELERATE Switch: Pressed
 3.7 V
[Ignition Switch: ON]
  • SET/COAST Switch: Pressed
 3 V
[Ignition Switch: ON]
  • DISTANCE Switch: Pressed
 2.2 V
101
(SB)		 108
(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
102
(LG)		 112
(V)		 EVAP Control System Pressure Sensor Input [Ignition Switch: ON] 1.8 - 4.8 V
103
(G)*3
(L)*4		 104
(GR)*3
(BR)*4		 Sensor Power Supply
(Accelerator Pedal Position Sensor 2)		 - [Ignition Switch: ON] 5 V
104
(GR)*3
(BR)*4		 - Sensor Ground
(Accelerator Pedal Position Sensor 2)		 - - -
105
(L)		 112
(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
106
(W)		 128
(B)		 Fuel Tank Temperature Sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with fuel tank temperature.
107
(BG)		 112
(V)		 Sensor power supply
(EVAP Control System Pressure Sensor, Refrigerant Pressure Sensor)		 - [Ignition Switch: ON] 5 V
108
(V)		 - Sensor Ground
(ASCD/ICC Steering Switch)		 - - -
109
(G)		 128
(B)		 PNP Signal Input [Ignition Switch: ON]
  • Selector lever: P or N
 BATTERY VOLTAGE
(11 - 14 V)
[Ignition Switch: ON]
  • Selector Lever: Except above
 0 V
110
(R)		 128
(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 VSTARF
STARFGNSJMBIA0076GB-076Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed is 2, 000 RPM
 1 VSTARF
STARFGNSJMBIA0077GB-077Courtesy of NISSAN NORTH AMERICA, INC.
112
(V)		 - Sensor Ground
(EVAP Control System Pressure Sensor, Refrigerant Pressure Sensor)		 - - -
113
(P)		 - CAN Communication line Input/Output - -
114
(L)		 - CAN Communication line Input/Output - -
117
(GR)		 128
(B)		 Data Link Connector Input/Output - -
121
(LG)		 128
(B)		 EVAP Canister Vent Control Valve Output [Ignition Switch: ON] BATTERY VOLTAGE
(11 - 14 V)
122
(P)		 128
(B)		 Stop Lamp Switch Input [Ignition Switch: OFF]
  • Brake pedal: Fully released
 0 V
[Ignition Switch: OFF]
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE
(11 - 14 V)
123
(B)
124
(B)		 - ECM Ground - - -
125
(GR)		 128
(B)		 Power Supply for ECM Input [Ignition Switch: ON] BATTERY VOLTAGE
(11 - 14 V)
126
(BR)		 128
(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
[Ignition Switch: ON]
  • Brake pedal: Fully released
 BATTERY VOLTAGE
(11 - 14 V)
127
(B)
128
(B)		 - ECM Ground - - -

STARF : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

*1: This may vary depending on internal resistance of the tester.

*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to HOW TO HANDLE BATTERY .

*3: Without ICC

*4: With ICC

scientia non olet · About LEMON Manuals