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Home >> Nissan-Datsun >> 2006 >> Sentra Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Introduction (QG18DE) >> 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-II.

CAUTION: Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's 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)
1 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
2 R A/F sensor 1 heater [Engine is running] 
  • Warm-up condition
  • Idle speed
 Approximately 5V(1)
G04080403Courtesy of NISSAN MOTOR CO., U.S.A.
3 R/W Throttle control motor power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
4 P Throttle control motor (Close) [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully released
 0 - 14V(1)
G04147110Courtesy of NISSAN MOTOR CO., U.S.A.
5 L Throttle control motor (Open) [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully depressed
 0 - 14V(1)
G04147111Courtesy of NISSAN MOTOR CO., U.S.A.
11 G/Y Intake valve timing control solenoid valve [Engine is running] 
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition
  • Engine speed: 2, 000 rpm
 7 - 10V(1)
G04074581Courtesy of NISSAN MOTOR CO., U.S.A.
12 P Power steering pressure sensor [Engine is running] 
  • Steering wheel: Being turned
 0.5 - 4.0V
[Engine is running] 
  • Steering wheel: Not being turned
 0.4 - 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.
 Approximately 3.0V(1)
G04190853Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm
 Approximately 3.0V(1)
G04190854Courtesy of NISSAN MOTOR CO., U.S.A.
14 W/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 - 4.0V(1)
G04190855Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm.
 1.0 - 4.0V(1)
G04190856Courtesy of NISSAN MOTOR CO., U.S.A.
15 W Knock sensor [Engine is running] 
  • Idle speed
 Approximately 2.5V
16 OR/L A/F sensor 1 [Engine is running] 
  • Warm-up condition
  • Idle speed
 Approximately 3.1V
35 B/Y Approximately 2.6V
56 OR 2 - 3V
75 W/L 2 - 3V
22
23
41
42		 G/B
R/B
L/B
Y/B		 Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 4
Fuel injector No. 2		 [Engine is running] 
  • Warm-up condition
  • Idle speed
NOTE: The pulse cycle changes depending on rpm at idle.
 BATTERY VOLTAGE (11 - 14V)(1)
G04147117Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition
  • Engine speed: 2, 000 rpm
 BATTERY VOLTAGE (11 - 14V)(1)
G04147118Courtesy of NISSAN MOTOR CO., U.S.A.
25 W/B 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 on load
 0 - 1.0V
[Ignition switch: ON] 
  • Engine stopped.

[Engine is running] 
  • Engine speed: Above 3, 600 rpm.
 BATTERY VOLTAGE (11 - 14V)
32 L EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
34 Y/G Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with intake air temperature.
45 GY/L 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)
G04074590Courtesy 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)
G04190860Courtesy of NISSAN MOTOR CO., U.S.A.
47 B Sensor power supply
(Throttle position sensor)		 [Ignition switch: ON]  Approximately 5V
48 R/W Sensor power supply (EVAP control system pressure sensor) [Ignition switch: ON]  Approximately 5V
49 R/Y Sensor power supply (Refrigerant pressure sensor) [Ignition switch: ON]  Approximately 5V
50 W Throttle position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully depressed
 Less than 4.75V
51 L/R 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.
 1.4 - 1.8V
61
62
80
81		 L/W
BR
GY/R
PU		 Ignition signal No. 3
Ignition signal No. 1
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.
 0 - 0.1V(1)
G04147122Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition
  • Engine speed: 2, 000 rpm.
 0 - 0.2V(1)
G04190862Courtesy of NISSAN MOTOR CO., U.S.A.
66 R 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 G/R Sensor power supply
(Power steering pressure sensor)		 [Ignition switch: ON]  Approximately 5V
69 G Throttle position sensor 2 [Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully depressed
 More than 0.36V
70 L Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition
  • Both A/C switch and blower switch: ON (Compressor operates.)
 1.0 - 4.0V
73 BR/W Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with engine coolant temperature.
74 R/L Heated oxygen sensor 2 [Engine is running] 
  • Revving engine from idle up 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
78 B Sensor ground
(Heated oxygen sensor)		 [Engine is running] 
  • Warm-up condition
  • Idle speed
 Approximately 0V
82 B/Y Sensor ground
(Accelerator pedal position sensor 1)		 [Engine is running] 
  • Warm-up condition
  • Idle speed
 Approximately 0V
83 G Sensor ground
(Accelerator pedal position sensor 2)		 [Engine is running] 
  • Warm-up condition
  • Idle speed
 Approximately 0V
84 PU Electrical load signal
(Headlamp signal)		 [Lighting switch: ON] 
  • Lighting switch: 2nd position
 BATTERY VOLTAGE (11 - 14V)
[Lighting switch: ON] 
  • Lighting switch: OFF
 Approximately 0V
85 LG DATA link connector [Ignition switch: ON] 
  • CONSULT-II or GST: Disconnected.
 BATTERY VOLTAGE (11 - 14V)
86 Y CAN communication line [Ignition switch: ON]  Approximately 2.3V
89 LG/B Cooling fan relay-2 (High) [Engine is running] 
  • Cooling fan: Not operating
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Cooling fan: High speed operating
 0 - 1.0V
90 R Sensor power supply
(Accelerator pedal position sensor 1)		 [Ignition switch: ON]  Approximately 5V
91 R/G Sensor power supply
(Accelerator pedal position sensor 2)		 [Ignition switch: ON]  Approximately 5V
93 L/W Electrical load signal (Rear window defogger signal) [Ignition switch: ON] 
  • Rear window defogger switch: ON
 BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON] 
  • Rear window defogger switch: OFF
 Approximately 0V
94 L CAN communication line [Ignition switch: ON]  Approximately 2.8V
96 Y/G Electrical load signal
(Heater fan signal)		 [Engine is running] 
  • Heater fan switch: ON
 Approximately 0V
[Engine is running] 
  • Heater fan switch: OFF
 Approximately 5V
97 LG/R Cooling fan relay-1 (Low) [Ignition switch: ON] 
  • Cooling fan: Not operating
 BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON] 
  • Cooling fan: Operating
 0 - 1.0V
98 R/B Accelerator pedal position sensor 2 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.28 - 0.48V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 More than 2.0V
99 W/R 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
101 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)
102 G/OR PNP switch [Ignition switch: ON] 
  • Gear position: P or N
 Approximately 0V
[Ignition switch: ON] 
  • Except the above gear position
 A/T models 
BATTERY VOLTAGE (11 - 14V)
M/T models 
Approximately 5V
104 P Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
106 W Accelerator pedal position sensor 1 [Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully released
 0.65 - 0.87V
[Ignition switch: ON] 
  • Engine stopped
  • Accelerator pedal: Fully depressed
 More than 4.3V
107 OR Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with fuel tank temperature.
108 P/L ASCD brake switch [Ignition switch: ON] 
  • Brake pedal: Slightly depressed (A/T)
  • Clutch pedal and/or brake pedal: Slightly depressed (M/T)
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released (A/T)
  • Clutch pedal and brake pedal: Fully released (M/T)
 BATTERY VOLTAGE (11 - 14V)
109 B/R Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
111 W/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)
113 B/P 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)
115
116		 B
B		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
117 L/Y EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
119
120		 R/G
R/G		 Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
121 W/L Power supply for ECM (Back-up) [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
(1) Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
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