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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction And Basic Inspection) (3.7L) (Except Hybrid) >> Ecu Diagnosis Information >> ECM >> Reference Value >> Physical Values

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 V SYMBOL

SYMBOLGNSJMBIA0030GB-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 V SYMBOL

SYMBOLGNSJMBIA0031GB-031Courtesy of NISSAN NORTH AMERICA, INC.

[Ignition switch: ON]

  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released

0 - 14 V SYMBOL

SYMBOLGNSJMBIA0032GB-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 V SYMBOL

SYMBOLGNSJMBIA0033GB-033Courtesy of NISSAN NORTH AMERICA, INC.

5

(L)

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 V SYMBOL

SYMBOLGNSJMBIA0030GB-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 V SYMBOL

SYMBOLG08435929Courtesy of NISSAN NORTH AMERICA, INC.

12

(L)

Ignition signal No. 3

15

(LG)

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 V SYMBOL

SYMBOLGNSJMBIA0036GB-036Courtesy of NISSAN NORTH AMERICA, INC.

19

(V)

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 V SYMBOL

SYMBOLGNSJMBIA0037GB-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

(Y)

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 V SYMBOL

SYMBOLGNSJMBIA0038GB-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) SYMBOL

SYMBOLGNSJMBIA0039GB-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) SYMBOL

SYMBOLGNSJMBIA0040GB-040Courtesy of NISSAN NORTH AMERICA, INC.

22

(B)

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

(V)

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

Dn. Arrow

BATTERY VOLTAGE

(11 - 14 V)

Dn. Arrow

0 V

[Ignition switch: ON]

0 - 1.0 V

28

(R)

128

(B)

VVEL actuator motor relay abort signal

[VVEL control module]

Output

[Engine is running]

  • Warm-up condition
  • Idle speed

0 V

29

(Y)

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 V SYMBOL

SYMBOLGNSJMBIA1638GB-638Courtesy of NISSAN NORTH AMERICA, INC.

30

(O)

40

(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

[Ignition switch: ON]

  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed

Less than 4.75 V

31

(O/L)

48

(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

[Ignition switch: ON]

  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed

Less than 4.75 V

33

(LG)

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 V SYMBOL

SYMBOLGNSJMBIA0037GB-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

(W/L)

40

(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

[Ignition switch: ON]

  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed

More than 0.36 V

35

(W)

48

(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

[Ignition switch: ON]

  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed

More than 0.36 V

37

(L)

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 V SYMBOL

SYMBOLGNSJMBIA0041GB-041Courtesy of NISSAN NORTH AMERICA, INC.

[Engine is running]

  • Engine speed: 2, 000 RPM

4.0 - 5.0 V SYMBOL

SYMBOLGNSJMBIA0042GB-042Courtesy of NISSAN NORTH AMERICA, INC.

38

(W)

96

(O)

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

(O/L)

--

Sensor ground

[Throttle position sensor (bank 1)]

--

--

--

43

(W/L)

48

(O)

Sensor power supply

[Throttle position sensor (bank 2)]

--

[Ignition switch: ON]

5 V

44

(W)

40

(O/L)

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

(B)

--

Sensor ground

[Crankshaft position sensor (POS)]

--

--

--

48

(O)

--

Sensor ground

[Throttle position sensor (bank 2)]

--

--

--

49

(LG)

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 V SYMBOL

SYMBOLGNSJMBIA0033GB-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 V SYMBOL

SYMBOLGNSJMBIA0031GB-031Courtesy of NISSAN NORTH AMERICA, INC.

[Ignition switch: ON]

  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released

0 - 14 V SYMBOL

SYMBOLGNSJMBIA0032GB-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

(G)

128

(B)

Ignition switch

Input

[Ignition switch: OFF]

0 V

[Ignition switch: ON]

BATTERY VOLTAGE

(11 - 14 V)

54

(L)

--

CAN communication line

[VVEL control module]

Input/output

--

--

55

(Y)

--

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

(L)

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 V SYMBOL

SYMBOLGNSJMBIA0045GB-045Courtesy of NISSAN NORTH AMERICA, INC.

[Engine is running]

  • Engine speed: 2, 000 RPM

3.0 - 5.0 V SYMBOL

SYMBOLGNSJMBIA0046GB-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

(B/W)

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

(BR)

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 V SYMBOL

SYMBOLGNSJMBIA0045GB-045Courtesy of NISSAN NORTH AMERICA, INC.

[Engine is running]

  • Engine speed: 2, 000 RPM

3.0 - 5.0 V SYMBOL

SYMBOLGNSJMBIA0046GB-046Courtesy of NISSAN NORTH AMERICA, INC.

64

(W)

128

(B)

Sensor power supply

[Camshaft position sensor (PHASE) (bank 2), Battery current sensor]

--

[Ignition switch: ON]

5 V

65

(L/O)

128

(B)

A/F sensor 1 (bank 2)

Input

[Ignition switch: ON]

2.2 V

66

(W/L)

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

(Y)

128

(B)

Intake air temperature sensor

Input

[Engine is running]

0 - 4.8 V

Output voltage varies with intake air temperature.

68

(V)

--

Sensor ground

[Mass air flow sensor (bank 1), Intake air temperature sensor]

--

--

--

69

(GR)

128

(B)

Knock sensor (bank 2)

Input

[Engine is running]

  • Idle speed

2.5 V* 1

71

(SB)

128

(B)

Engine coolant temperature sensor

Input

[Engine is running]

0 - 4.8 V

Output voltage varies with engine coolant temperature.

72

(--)

--

Sensor ground

(Knock sensor)

--

--

--

73

(W)

128

(B)

Knock sensor (bank 1)

Input

[Engine is running]

  • Idle speed

2.5 V* 1

76

(BR)

128

(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

(O)

68

(V)

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/W)

Engine oil temperature sensor

Input

[Engine is running]

0 - 4.8 V

Output voltage varies with engine oil temperature.

79

(BR)

94

(B)

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

(L)

128

(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

(Y)

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) SYMBOL

SYMBOLGNSJMBIA0047GB-047Courtesy of NISSAN NORTH AMERICA, INC.

82

(V)

Fuel injector No. 6

85

(BR)

Fuel injector No. 2

86

(R)

Fuel injector No. 5

[Engine is running]

  • Warm-up condition
  • Engine speed: 2, 000 RPM

BATTERY VOLTAGE

(11 - 14 V) SYMBOL

SYMBOLGNSJMBIA0048GB-048Courtesy of NISSAN NORTH AMERICA, INC.

89

(GR)

Fuel injector No. 1

90

(O)

Fuel injector No. 4

83

(GR)

128

(B)

Battery temperature sensor

Input

[Engine is running]

  • Battery: Fully charged* 2
  • Idle speed

1.6 V

84

(B/W)

--

Sensor ground

(Heated oxygen sensor 2, Engine coolant temperature sensor, Engine oil temperature sensor)

--

--

--

87

(V)

96

(O)

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

(G)

95

(W)

Battery current sensor

Input

[Engine is running]

  • Battery: Fully charged* 2
  • Idle speed

2.6 - 3.5 V

92

(R)

--

Sensor ground

[Camshaft position sensor (PHASE) (bank 2)]

--

--

--

93

(W)

128

(B)

Power supply for ECM (Back-up)

Input

[Ignition switch: OFF]

BATTERY VOLTAGE

(11 - 14 V)

94

(B)

--

Sensor ground

[Mass air flow sensor (bank 2)]

--

--

--

95

(W)

--

Sensor ground

(Battery current sensor)

--

--

--

96

(O)

--

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

0.5 - 1.00 V

[Ignition switch: ON]

  • Engine stopped
  • Accelerator pedal: Fully depressed

4.2 - 4.8 V

98

(Y)

104

(BR) *3

(B) *4

Accelerator pedal position sensor 2

Input

[Ignition switch: ON]

  • Engine stopped
  • Accelerator pedal: Fully released

0.25 - 0.50 V

[Ignition switch: ON]

  • Engine stopped
  • Accelerator pedal: Fully depressed

2.0 - 2.5 V

99

(G)

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

(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

101

(SB)

108

(Y)

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

(P)

112

(V)

EVAP control system pressure sensor

Input

[Ignition switch: ON]

1.8 - 4.8 V

103

(L)

104

(BR) *3

(B) *4

Sensor power supply

(Accelerator pedal position sensor 2)

--

[Ignition switch: ON]

5 V

104

(BR) *3

(B) *4

--

Sensor ground

(Accelerator pedal position sensor 2)

--

--

--

105

(LG)

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

(P)

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

(Y)

--

Sensor ground

(ASCD/ICC steering switch)

--

--

--

109

(BR)

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

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

(V)

128

(B)

Data link connector

Input/Output

--

--

120

(V)

--

Sensor ground

(Fuel tank temperature sensor)

--

--

--

121

(G)

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

(SB)

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

--

--

--

SYMBOL : 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: With ICC

*4: Without ICC