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Home >> Infiniti >> 2014 >> Q50 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction) (Except Hybrid) >> Ecu Diagnosis Information >> ECM >> Reference Value >> Physical Values
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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(1)
G09159990
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(1)
G09159991
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14 V(1)
G09159992
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(1)
G09159993
5 (GR) 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(1)
G09159994
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(1)
G09159995
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 V(1)
G09159996
19 (SB) Ignition signal No. 6
20 (Y) Ignition signal No. 1
14 (Y) 128 (B) Fuel pump control module (FPCM) Output [When cranking engine]
  • Not cold state condition
 4.0 V(1)
G09159997
[Engine is running]
  • Warm-up condition
  • Idle speed

[Ignition switch: ON]
  • For 1 second after turning ignition switch ON
 4.0 V(1)
G09159998
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(1)
G09159999
[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 V(1)
G09160000
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)(1)
G09160001
[Engine is running]
  • Engine speed: About 2, 000 RPM (More than 100 seconds after starting engine)
 BATTERY VOLTAGE (11 - 14 V)(1)
G09160002
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 (BG) 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 V(1)
G09160003
30 (W) 40 (R) 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 (P) 48 (SB) 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
32 (W) 128 (B) Fuel pump control module (FPCM) check Input [Engine is running]
  • Warm-up condition
  • Idle speed
 8 - 13.5 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 V(1)
G09160004
[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
  • 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 (LG) 48 (SB) 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 (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 V(1)
G09160005
[Engine is running]
  • Engine speed: 2, 000 RPM
 4.0 - 5.0 V(1)
G09160006
38 (P) 96 (BR) Manifold absolute pressure (MAP) sensor(6) 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 (BR) 48 (SB) Sensor power supply
[Throttle position sensor (bank 2)]		 - [Ignition switch: ON] 5 V
44 (G) 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 (SB) - 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 V(1)
G09160007
50 (W) 128 (B) Throttle control motor (Open) (bank 2) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 0 - 14 V(1)
G09160008
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14 V(1)
G09160009
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 (Y) - ENGINE communication line Input/output - -
55 (LG) - ENGINE communication line Input/output - -
57 (L) 128 (B) A/F sensor 1 (bank 1) Input [Ignition switch: ON] 2.2 V
59 (SB) 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(1)
G09160010
[Engine is running]
  • Engine speed: 2, 000 RPM
 3.0 - 5.0 V(1)
G09160011
60 (GR) 128 (B) Sensor power supply [Camshaft position sensor (PHASE) (bank 1), Manifold absolute pressure (MAP) sensor(6), Power steering pressure sensor(5)] - [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 V(1)
G09160012
[Engine is running]
  • Engine speed: 2, 000 RPM
 3.0 - 5.0 V(1)
G09160013
64 (W) 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(2)
71 (Y) 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(2)
76 (W) 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 (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 (BR) 84 (B) Engine oil temperature sensor Input [Engine is running] 0 - 4.8 V Output voltage varies with engine oil temperature.
79 (G) 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 (BG) 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 (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)(1)
G09160014
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)(1)
G09160015
89 (GR) Fuel injector No. 1
90 (BG) Fuel injector No. 4
83 (BG) 128 (B) Battery temperature sensor Input [Engine is running]
  • Battery: Fully charged(3)
  • Idle speed
 1.6 V
84 (B) - Sensor ground
(Heated oxygen sensor 2, Engine coolant temperature sensor, Engine oil temperature sensor)		 - - -
87(5) (Y) 96 (BR) 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 (R) 95 (B) Battery current sensor Input [Engine is running]
  • Battery: Fully charged(3)
  • 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 (B) - Sensor ground
(Battery current sensor)		 - - -
96 (BR) - Sensor ground
[Camshaft position sensor (PHASE) (bank 1), Manifold absolute pressure (MAP) sensor(6), Power steering pressure sensor(5)]		 - - -
97 (Y) 100 (G) 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
 4.4 - 4.8 V
98 (BR) 104 (R) 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 (W) 100 (G) Sensor power supply
(Accelerator pedal position sensor 1)		 - [Ignition switch: ON] 5 V
100 (G) - 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(4) (LG) 112 (V) EVAP control system pressure sensor Input [Ignition switch: ON] 1.8 - 4.8 V
103 (L) 104 (R) Sensor power supply (Accelerator pedal position sensor 2) - [Ignition switch: ON] 5 V
104 (R) - 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 (P) 128 (B) Fuel tank temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with fuel tank temperature.
107 (GR) 112 (V) Sensor power supply (EVAP control system pressure sensor(4), 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
110(5) (V) 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 V(1)
G09160016
[Engine is running]
  • Engine speed is 2, 000 RPM
 1 V(1)
G09160017
112 (V) - Sensor ground
(EVAP control system pressure sensor(4), 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 - -
121(4) (LG) 128 (B) EVAP canister vent control valve Output [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
122 (SB) 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 (R) 128 (B) Power supply for ECM Input [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
126 (BG) 128 (B) Brake pedal position switch 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 - - -
(1) Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
(2) This may vary depending on internal resistance of the tester.
(3) Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to "HOW TO HANDLE BATTERY ".
(4) For North America
(5) With power steering system models
(6) For Mexico
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