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ECM Inspection Table

WARNING: This page is about a different car, the 2007 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.

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.
INPUT/OUTPUT VOLTAGE CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
2 Y/B Throttle control motor power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
4 BR/W A/F sensor 1 heater (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed (More than 140 seconds after starting engine)
G04900085Courtesy of NISSAN NORTH AMERICA, INC.
5 W Throttle control motor (Open) [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully depressed
G04925760Courtesy of NISSAN NORTH AMERICA, INC.
6 L/R Throttle control motor (Close) [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully released
G04925761Courtesy of NISSAN NORTH AMERICA, INC.
8 BR/Y A/F sensor 1 heater (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed (More than 140 seconds after starting engine)
G04900085Courtesy of NISSAN NORTH AMERICA, INC.
9
10
11
21		 Y
BR/Y
V
G		 Ignition signal No. 3
Ignition signal No. 2
Ignition signal No. 1
Ignition signal No. 4		 [Engine is running] 
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle.
G04925763Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm.
G04925764Courtesy of NISSAN NORTH AMERICA, INC.
12
16		 B
B		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
13 B 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.
G04925765Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition switch: ON] 
  • Engine stopped

[Engine is running] 
  • Engine speed: Above 3, 600 rpm.
 BATTERY VOLTAGE (11 - 14V)
14 B/O Fuel pump relay [Ignition switch: ON] 
  • For 1 second after turning ignition switch ON

[Engine is running] 		 0 - 1.0V
[Ignition switch: ON] 
  • More than 1 second after turning ignition switch ON
 BATTERY VOLTAGE (11 - 14V)
15 G/Y Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
17 R/L 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
  • d 4, 000 rpm for 1 minute and at idle for 1 minute under no load. Approximately 10V
G04925765Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition switch: ON] 
  • Engine stopped

[Engine is running] 
  • Engine speed: Above 3, 600 rpm.
 BATTERY VOLTAGE (11 - 14V)
24 R/B ECM relay (Self shut-off) [Engine is running] 
[Ignition switch: OFF] 
  • For a few seconds after turning ignition switch OFF
 0 - 1.0V
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
 BATTERY VOLTAGE (11 - 14V)
25 W/B EVAP canister purge volume control solenoid valve [Engine is running] 
  • Idle speed
  • Accelerator pedal: Not depressed even slightly, after engine starting.
G04900462Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: About 2, 000 rpm (More than 100 seconds after starting engine)
G04925768Courtesy of NISSAN NORTH AMERICA, INC.
29
30
31
32		 R
O
GR
L		 Fuel injector No. 4
Fuel injector No. 3
Fuel injector No. 2
Fuel injector No. 1		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle.
G04895182Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
G04925175Courtesy of NISSAN NORTH AMERICA, INC.
33 G 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
  • 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
34 W 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
  • 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
35 B Sensor ground (Heated oxygen sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
36 G Sensor ground (Throttle position sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
37 R Throttle position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully depressed
 Less than 4.75V
38 W Throttle position sensor 2 [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully depressed
 More than 0.36V
39 L Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower fan switch: ON (Compressor operates)
 1.0 - 4.0V
40 R/G Sensor ground (Refrigerant pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
45 W A/F sensor 1 (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
 Approximately 1.8V
Output voltage varies with air fuel ratio.
46 P Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with engine coolant temperature.
47 B Sensor power supply (Throttle position sensor) [Ignition switch: ON]  Approximately 5V
49 B A/F sensor 1 (Bank 1) [Ignition switch: ON]  Approximately 2.2V
50 BR/Y Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V 
Output voltage varies with intake air temperature.
52 GR Sensor ground (Engine coolant temperature sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
53 W A/F sensor 1 (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
 Approximately 1.8V
Output voltage varies with air fuel ratio.
56 B Sensor ground [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
57 R A/F sensor 1 (Bank 2) [Ignition switch: ON]  Approximately 2.2V
58 V Mass air flow sensor [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0.9 - 1.1V
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 1.4 - 1.7V
59 G/Y Sensor power supply [Camshaft position sensor (PHASE)] [Ignition switch: ON]  Approximately 5V
60 B Sensor ground [Crankshaft position sensor (POS)] [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
61 W Knock sensor [Engine is running] 
  • Idle speed
 Approximately 2.5V
64 B Sensor ground [Camshaft position sensor (PHASE)] [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
65 Y Crankshaft position sensor (POS) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle.
G04925771Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 rpm
G04925177Courtesy of NISSAN NORTH AMERICA, INC.
67 - Sensor ground (Knock sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
69 R Camshaft position sensor (PHASE) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle.
G04925178Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 rpm.
G04925179Courtesy of NISSAN NORTH AMERICA, INC.
72 G/W Sensor power supply (Refrigerant pressure sensor) [Ignition switch: ON]  Approximately 5V
76 G/R Sensor power supply [Crankshaft position sensor (POS)] [Ignition switch: ON]  Approximately 5V
77 Y/R Power supply for ECM (Back-up) [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
78 Y/R Intake valve timing control solenoid valve [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • When revving engine up to 2, 000 rpm quickly
G04925180Courtesy of NISSAN NORTH AMERICA, INC.
81 W Accelerator pedal position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.6 - 0.9V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 3.9 - 4.7V
82 Y/G Accelerator pedal position sensor 2 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.3 - 0.6V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 1.95 - 2.4V
83 O Sensor power supply (Accelerator pedal position sensor 1) [Ignition switch: ON]  Approximately 5V
84 B/W Sensor ground (Accelerator pedal position sensor 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
85 L/Y ASCD steering switch [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
86 R/B EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
87 BR/Y Sensor power supply (Accelerator pedal position sensor 2) [Ignition switch: ON]  Approximately 5V
88 P/L DATA link connector [Ignition switch: ON] 
  • CONSULT-III or GST: Disconnected.
 Approximately 10.5V
91 V/W Sensor power supply (EVAP control system pressure sensor) [Ignition switch: ON]  Approximately 5V
92 B/Y Sensor ground (ASCD steering switch) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
93 B/R Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
95 G/O Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with fuel tank temperature
96 V/R Sensor ground (EVAP control system pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
97 P CAN communication line - -
98 L CAN communication line - -
100 B Sensor ground (Accelerator pedal position sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
102 BR/R Park/neutral position (PNP) switch [Ignition switch: ON] 
  • Shift lever: P or N (CVT), Neutral (M/T)
 BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON] 
  • Except above
 Approximately 0V
104 B/P Sensor ground (Fuel tank temperature sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
105 G Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
106 R/G Stop lamp switch [Ignition switch: OFF] 
  • Brake pedal: Fully released
 Approximately 0V
[Ignition switch: OFF] 
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14V)
107
108		 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
109 L/Y EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
110 G/B ASCD brake switch [Ignition switch: ON] 
  • Brake pedal: Slightly depressed (CVT)
  • Brake pedal and/or clutch pedal: Slightly depressed (M/T)
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released (CVT)
  • Brake pedal and clutch pedal: Fully released (M/T)
 BATTERY VOLTAGE (11 - 14V)
111
112		 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
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