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Home >> Infiniti >> 2008 >> FX45 >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (VK45DE) - Introduction >> Trouble Diagnosis >> ECM Terminals and Reference Value >> ECM Inspection Table
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ECM Inspection Table

Specification data are reference values and are measured between each terminal and ground. Pulse signal is measured by CONSULT-III.

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
ECM INSPECTION CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
1 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
2 P A/F sensor 1 heater (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 5V*
G04895143Courtesy of NISSAN MOTOR CO., U.S.A.
3 P Throttle control motor relay power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
4 L/W Throttle control motor (Close) [Ignition switch: ON] 
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
G04900086Courtesy of NISSAN MOTOR CO., U.S.A.
5 L/B Throttle control motor (Open) [Ignition switch: ON] 
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
G04900087Courtesy of NISSAN MOTOR CO., U.S.A.
6 R Heated oxygen sensor 2 heater (Bank 1) [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
 0 - 1.0V
[Ignition switch: ON] 
  • Engine stopped

    [Engine is running] 

  • Engine speed: Above 3, 600 rpm
 BATTERY VOLTAGE (11 - 14V)
10 OR Intake valve timing control solenoid valve (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000rpm
G04900088Courtesy of NISSAN MOTOR CO., U.S.A.
11 BR Intake valve timing control solenoid valve (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000rpm
G04900088Courtesy of NISSAN MOTOR CO., U.S.A.
12 R/G Power steering pressure sensor [Engine is running] 
  • Steering wheel: Being turned
 0.5 - 4.5V
[Engine is running] 
  • Steering wheel: Not being turned
 0.4 - 0.8V
13 Y Crankshaft position sensor (POS) [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on rpm at idle
G04900411Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm
G04900412Courtesy of NISSAN MOTOR CO., U.S.A.
14 W Camshaft position sensor (PHASE) [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on rpm at idle
G04900092Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm
G04900093Courtesy of NISSAN MOTOR CO., U.S.A.
15 W Knock sensor (Bank 1) [Engine is running] 
  • Idle speed
 Approximately 2.5V
16 R A/F sensor 1 (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 3.1V
35 G Approximately 2.6V
56 B Approximately 2.3V
75 OR Approximately 2.3V
21
22
23
40
41
42
44
63		 W
R
P
PU
BR
B
OR
G		 Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2
Fuel injector No. 7
Fuel injector No. 8		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on rpm at idle
G04900345Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04900346Courtesy of NISSAN MOTOR CO., U.S.A.
24 P A/F sensor 1 heater (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
G04895143Courtesy of NISSAN MOTOR CO., U.S.A.
25 P Heated oxygen sensor 2 heater (Bank 2) [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
 0 - 1.0V
[Ignition switch: ON] 
  • Engine stopped

    [Engine is running] 

  • Engine speed: Above 3, 600 rpm
 BATTERY VOLTAGE (11 - 14V)
29 GY VIAS control solenoid valve [Engine is running] 
  • Selector lever: P or N
 0 - 1.0V
[Engine is running] 
  • Selector lever: D
  • Engine speed: Below 5, 000 rpm
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Engine speed: Above 5, 000 rpm
 0 - 1.0V
32 OR EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
34 Y Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with intake air temperature.
36 W Knock sensor (Bank 2) [Engine is running] 
  • Idle speed
 Approximately 2.5V
45 W EVAP canister purge volume control solenoid valve [Engine is running] 
  • Idle speed
 BATTERY VOLTAGE
G04900462Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: About 2, 000 rpm (More than 100 seconds after starting engine)
G04900463Courtesy of NISSAN MOTOR CO., U.S.A.
46
60
61
62
65
79
80
81		 BR
SB
L
Y
P
LG
GY
G		 Ignition signal No. 7
Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1
Ignition signal No. 8
Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on rpm at idle
G04900803Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04900804Courtesy of NISSAN MOTOR CO., U.S.A.
47 L Sensor power supply (Throttle position sensor) [Ignition switch: ON]  Approximately 5V
48 L Sensor power supply (EVAP control system pressure sensor) [Ignition switch: ON]  Approximately 5V
49 PU Sensor power supply (Refrigerant pressure sensor) [Ignition switch: ON]  Approximately 5V
50 W Throttle position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 Less than 4.75V
51 L/W Mass air flow sensor [Engine is running] 
  • Warm-up condition 
  • Idle speed
 1.0 - 1.3V
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 1.6 - 2.0V
53 R/L Intake valve timing control position sensor (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0 - 1.0V
[Engine is running] 
  • Engine speed: 2, 000 rpm
G04900144Courtesy of NISSAN MOTOR CO., U.S.A.
55 W/R Heated oxygen sensor 2 (Bank 1) [Engine is running] 
  • Revving engine from idle to 3, 000 rpm quickly after the following conditions are met
    • Engine: After warming up
    • After keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load
 0 - Approximately 1.0V
57 G A/F sensor 1 (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 2.6V
58 L Approximately 2.3V
76 R Approximately 3.1V
77 OR Approximately 2.3V
66 B Sensor ground (Throttle position sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
67 B/W Sensor ground [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
68 SB Sensor power supply (Power steering pressure sensor) [Ignition switch: ON]  Approximately 5V
69 R Throttle position sensor 2 [Ignition switch: ON] 
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 More than 0.36V
70 L/R Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower fan motor switch: ON (Compressor operates)
 1.0 - 4.0V
72 BR Intake valve timing control position sensor (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0 - 1.0V
[Engine is running] 
  • Engine speed: 2, 000rpm
G04900144Courtesy of NISSAN MOTOR CO., U.S.A.
73 GY Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with engine coolant temperature.
74 LG/B Heated oxygen sensor 2 (Bank 2) [Engine is running] 
  • Revving engine from idle to 3, 000 rpm quickly after the following conditions are met
    • Engine: After warming up
    • After keeping the engine speed between 3, 500 and 4, 000 rpm for 1 minute and at idle for 1 minute under no load
 0 - Approximately 1.0V
78 B/R Sensor ground (Heated oxygen sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
82 B/W Sensor ground (APP sensor 1 / ICC steering switch / ASCD steering switch) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
83 G/OR Sensor ground (APP sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
85 PU Data link connector [Ignition switch: ON] 
  • CONSULT-III or GST: Disconnected
 Approximately 5V - Battery voltage (11 - 14V)
86 P CAN communication line [Ignition switch: ON]  Approximately 1.1 - 2.3V Output voltage varies with the communication status.
90 L/B Sensor power supply (APP sensor 1) [Ignition switch: ON]  Approximately 5V
91 G Sensor power supply (APP sensor 2) [Ignition switch: ON]  Approximately 5V
94 L CAN communication line [Ignition switch: ON]  Approximately 2.6 - 3.2V Output voltage varies with the communication status.
98 Y/R Accelerator pedal position sensor 2 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.15 - 0.60V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 1.95 - 2.40V
99 G/Y ICC steering switch (models with ICC system) [Ignition switch: ON] 
  • ICC steering switch: OFF
 Approximately 4.3V
[Ignition switch: ON] 
  • MAIN switch: Pressed
 Approximately 0V
[Ignition switch: ON] 
  • CANCEL switch: Pressed
 Approximately 1.3V
[Ignition switch: ON] 
  • RESUME/ACCELERATE switch: Pressed
 Approximately 3.7V
[Ignition switch: ON] 
  • SET/COAST switch: Pressed
 Approximately 3V
[Ignition switch: ON] 
  • DISTANCE switch: Pressed
 Approximately 2.2V
99 G/Y ASCD steering switch (models with ASCD system) [Ignition switch: ON] 
  • ASCD steering switch: OFF
 Approximately 4V
[Ignition switch: ON] 
  • MAIN switch: Pressed
 Approximately 0V
[Ignition switch: ON] 
  • CANCEL switch: Pressed
 Approximately 1V
[Ignition switch: ON] 
  • RESUME/ACCELERATE switch: Pressed
 Approximately 3V
[Ignition switch: ON] 
  • SET/COAST switch: Pressed
 Approximately 2V
101 P/L Stop lamp switch [Ignition switch: OFF] 
  • Brake pedal: Fully released
 Approximately 0V
[Ignition switch: OFF] 
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14V)
102 LG/B PNP switch [Ignition switch: ON] 
  • Selector lever: P or N
 Approximately 0V
[Ignition switch: ON] 
  • Selector lever: Except above
 BATTERY VOLTAGE (11 - 14V)
104 L/OR Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
106 OR Accelerator pedal position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.5 - 1.0V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 3.9 - 4.7V
107 PU/W Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with fuel tank temperature.
108 SB ICC brake switch (models with ICC system)
ASCD brake switch (models with ASCD system)		 [Ignition switch: ON] 
  • Brake pedal: Slightly depressed
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14V)
109 W/L Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
111 W/B ECM relay (Self shut-off) [Engine is running] 
[Ignition switch: OFF] 
  • For a few seconds after turning ignition switch OFF
 0 - 1.5V
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
 BATTERY VOLTAGE (11 - 14V)
113 GY/R Fuel pump relay [Ignition switch: ON] 
  • For 1 second after turning ignition switch ON

    [Engine is running] 

 0 - 1.5V
[Ignition switch: ON] 
  • More than 1 second after turning ignition switch ON
 BATTERY VOLTAGE (11 - 14V)
115
116		 B/R
B/W		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
117 R/Y EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
119
120		 R
R/B		 Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
121 R/W Power supply for ECM (Back-up) [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
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