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Home >> Nissan-Datsun >> 2006 >> Sentra SE-R Spec V >> Repair and Diagnosis >> External Pages >> Different car >> Section 132 (Engine Control System - Introduction (MR20DE Except CALIFORNIA)) >> Service Information >> Trouble Diagnosis >> ECM Terminal and Reference Value >> ECM Inspection Table
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ECM Inspection Table

WARNING: This page is about a different car, the 2009 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.
TERMINAL VOLTAGE REFERENCE CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
1 V Throttle control motor (Open) [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully depressed
 Approximately 3.2V(1)
G05922056Courtesy of NISSAN MOTOR CO., U.S.A.
2 Y/B Throttle control motor power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
3 BR/W A/F sensor 1 heater [Engine is running] 
  • Warm-up condition 
  • Idle speed (More than 140 seconds after starting engine)
 Approximately 2.9 - 8.8V(1)
G05922057Courtesy of NISSAN MOTOR CO., U.S.A.
4 L/R Throttle control motor (Close) [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully released
 Approximately 1.8V(1)
G05922058Courtesy of NISSAN MOTOR CO., U.S.A.
5 B/W Heated oxygen sensor 2 heater [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.
 Approximately 10V(1)
G05922059Courtesy of NISSAN MOTOR CO., U.S.A.
[Ignition switch: ON] 
  • Engine stopped

[Engine is running] 
  • Engine speed: Above 3, 600 RPM.
 BATTERY VOLTAGE (11 - 14V)
9 W/B EVAP canister purge volume control solenoid valve [Engine is running] 
  • Idle speed
  • Accelerator pedal: Not depressed even slightly, after engine starting.
 BATTERY VOLTAGE (11 - 14V)(1)
G05922060Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: About 2, 000 RPM (More than 100 seconds after starting engine)
 Approximately 10V(1)
G05922061Courtesy of NISSAN MOTOR CO., U.S.A.
10
11		 B
B		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
15 G/Y Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
17
18
21
22		 V
BR/Y
G
Y		 Ignition signal No. 1
Ignition signal No. 2
Ignition signal No. 4
Ignition signal No. 3		 [Engine is running] 
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle.
 0 - 0.3V(1)
G05922062Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM.
 0.2 - 0.5V(1)
G05922063Courtesy of NISSAN MOTOR CO., U.S.A.
23 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)
25
29
30
31		 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.
 BATTERY VOLTAGE (11 - 14V)(1)
G05922064Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE (11 - 14V)(1)
G05922065Courtesy of NISSAN MOTOR CO., U.S.A.
28 L/Y EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
32 R/G 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)
33 Y/B 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
34 R/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
36 BR/W Sensor ground (Throttle position sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
37 W Knock sensor [Engine is running] 
  • Idle speed
 Approximately 2.5V
38 P Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with engine coolant temperature.
40 - Sensor ground (Knock sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
41 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
42 R/Y EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
43 G/O Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with fuel tank temperature
44 GR Sensor ground (Engine coolant temperature sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
45 V Mass air flow sensor [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0.9 - 1.2V
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 1.5 - 1.8V
46 BR/Y Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with intake air temperature.
48 R/G Sensor ground (Refrigerant pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
49 L/R A/F sensor 1 [Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 Approximately 1.8V
Output voltage varies with air fuel ratio.
50 G Heated oxygen sensor 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
51 V/R Sensor ground (EVAP control system pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
52 B/W Sensor ground (Mass air flow sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
53 L/G A/F sensor 1 [Ignition switch: ON]  Approximately 2.2V
55 O Sensor ground (Intake air temperature sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
59 B/Y Sensor ground (Heated oxygen sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
60 B Sensor ground (Fuel tank temperature sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
61 Y Crankshaft position sensor (POS) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle.
 Approximately 4.0V(1)
G05922066Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 RPM
 Approximately 4.0V(1)
G05922067Courtesy of NISSAN MOTOR CO., U.S.A.
62 B/P Sensor ground [Crankshaft position sensor (POS)] [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V(1)
63 B/R Sensor ground [Camshaft position sensor (PHASE)] [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
65 R Camshaft position sensor (PHASE) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle.
 1.0 - 2.0V(1)
G05922068Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 RPM.
 1.0 - 2.0V(1)
G05922069Courtesy of NISSAN MOTOR CO., U.S.A.
69 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
72 BR Sensor power supply (Throttle position sensor) [Ignition switch: ON]  Approximately 5V
73 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
 7 - 10V(1)
G05922070Courtesy of NISSAN MOTOR CO., U.S.A.
74 G/W Sensor power supply (Refrigerant pressure sensor) [Ignition switch: ON]  Approximately 5V
75 G/R Sensor power supply [Crankshaft position sensor (POS)] [Ignition switch: ON]  Approximately 5V
76 V/W EVAP control system pressure sensor power supply [Ignition switch: ON]  Approximately 5V
78 G/Y Sensor power supply [Camshaft position sensor (PHASE)] [Ignition switch: ON]  Approximately 5V
83 P CAN communication line - -
84 L CAN communication line - -
88 P/L DATA link connector - -
93 B/R Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
94 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
95 B/Y Sensor ground (ASCD steering switch) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
99 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)
100 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)
102 BR/Y Sensor power supply (Accelerator pedal position sensor 2) [Ignition switch: ON]  Approximately 5V
103 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
104 B/P Sensor ground (Accelerator pedal position sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
105 G Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
106 O Sensor power supply (Accelerator pedal position sensor 1) [Ignition switch: ON]  Approximately 5V
108 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
110 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
111 B/W Sensor ground (Accelerator pedal position sensor 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
(1) Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
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