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Home >> Nissan-Datsun >> 2013 >> Sentra FE+SV >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction) >> Ecu Diagnosis Information >> ECM >> Reference Value >> Physical Values
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Physical Values

NOTE:
  • ECM is located in the engine room left side near battery.
  • 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 (P) 128 (B/Y) Throttle control motor (Close) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D (CVT)
  • Shifter lever: 1st (M/T)
  • Accelerator pedal: Fully released
G08989222
2 (G) 128 (B/Y) Throttle control motor power supply Input [Ignition switch: ON] Battery voltage (11 - 14 V)
3 (W) 128 (B/Y) Throttle control motor (Open) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D (CVT)
  • Shifter lever: 1st (M/T)
  • Accelerator pedal: Fully depressed
G08989223
4 (W) 8 (B) Knock sensor Input [Engine is running]
  • Idle speed
 2.5 V
5 (G) 128 (B/Y) Intake manifold tuning valve motor (Close) Output [Ignition switch ON]
  • Engine coolant temperature: Normal operating condition
  • Accelerator pedal: Depressed → fully released
 Battery voltage appears for about 1 second.
6 (R) 128 (B/Y) Intake manifold tuning valve motor power supply Input [Ignition switch: ON] Battery voltage (11 - 14 V)
7 (R) 128 (B/Y) Intake manifold tuning valve motor (Open) Output [Ignition switch ON]
  • Engine coolant temperature: normal operating condition
  • Accelerator pedal: Fully released → depressed
 Battery voltage appears for about 1 second.
8 (B) - Sensor ground (Knock sensor) - - -
9 (BR)
10 (SB)
13 (O)
14 (V)		 128 (B/Y) Fuel injector No. 4
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 2		 Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G08989224
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 rpm
G08989225
12 (B) - ECM ground - - -
16 (B) - ECM ground - - -
17 (L) 128 (B/Y) EVAP canister purge volume control solenoid valve Output [Engine is running]
  • Idle speed
  • Accelerator pedal: Not depressed even slightly, after engine starting
G08989226
[Engine is running]
  • Engine speed: About 2, 000 rpm (More than 100 seconds after starting engine.)
G08989227
18 (GR) 128 (B/Y) Fuel pump relay Output [Ignition switch: ON]
  • For 1 second after turning ignition switch ON

[Engine is running]		 0 - 1.0 V
[Ignition switch: ON]
  • More than 1 second after turning ignition switch ON
 Battery voltage (11 - 14 V)
21 (Y) 128 (B/Y) Throttle control motor relay Output [Ignition switch: OFF] Battery voltage (11 - 14 V)
[Ignition switch: ON] 0 - 1.0 V
22 (W) 23 (BR) Heated oxygen sensor 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
23 (BR) - Sensor ground (Heated oxygen sensor 2) - - -
25 (Y) 26 (P) Engine oil temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with engine oil temperature.
26 (P) - Sensor ground (Engine oil temperature sensor) - - -
27 (LG) - Sensor ground (Engine coolant temperature sensor) - - -
28 (V) 27 (LG) Engine coolant temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with engine coolant temperature.
30 (L) - Sensor ground [Camshaft position sensor (PHASE)] - - -
31 (BR) 30 (L) Camshaft position sensor (PHASE) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G08989228
[Engine is running]
  • Engine speed is 2, 000 rpm
G08989229
32 (GR) - Sensor power supply [Camshaft position sensor (PHASE)] - [Ignition switch: ON] 5.0 V
33 (GR) 34 (W) Intake air temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with intake air temperature.
34 (W) - Sensor ground (Mass air flow sensor, intake air temperature sensor) - - -
35 (G) 34 (W) Mass air flow sensor Input [Ignition switch: ON]
  • Engine stopped
 1.27 V
[Engine is running]
  • Warm-up condition
  • Idle speed
 1.3 - 1.6 V
[Engine is running]
  • Warm-up condition
  • Engine is revving from idle to about 4, 000 rpm
 1.3 - 1.6 → 2.6 V (Check for linear voltage rise in response to engine being increased to about 4, 000 rpm.)
36 (R) - Sensor power supply (Mass air flow sensor, intake air temperature sensor) - [Ignition switch: ON] 5.0 V
37 (B) - Shield - - -
38 (W) - Sensor ground (Engine oil pressure sensor) - - -
39 (G) 38 (W) Engine oil pressure sensor Input [Engine is running]
  • Warm-up condition
  • Idle speed
G08989230
[Engine is running]
  • Warm-up condition
  • Engine speed is 2, 000 rpm
G08989231
40 (R) 38 (W) Sensor power supply (Engine oil pressure sensor) - [Ignition switch: ON] 5.0 V
41 (Y) 128 (B/Y) A/F sensor 1 Input Engine running]
  • Warm-up condition
  • Engine speed: 2, 000 rpm
 2.2 V
(Output voltage varies with air-fuel ratio)
42 (W) - Sensor ground [Exhaust valve timing control position sensor] - - -
43 (P) 42 (W) Exhaust valve timing control position sensor Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G08989232
[Engine is running]
  • Engine speed is 2, 500 rpm
G08989233
44 (R) - Sensor power supply [Exhaust valve timing control position sensor] - [Ignition switch: ON] 5 V
45 (BR) 128 (B/Y) A/F sensor 1 Input [Engine is running]
  • Engine speed is 2, 000 rpm
 2.2 V
Output voltage varies with air fuel ratio.
49 (G) 128 (B/Y) Intake manifold runner control valve motor (Close) Output [Ignition switch ON]
  • Engine coolant temperature: More than 60°C (140°F)
  • Accelerator pedal: Depressed → fully released
 Battery voltage appears for about 1 second.
50 (R) 128 (B/Y) Intake manifold runner control valve motor power supply Input [Ignition switch: ON] Battery voltage (11 - 14 V)
51 (R) 128 (B/Y) Intake manifold runner control valve motor (Open) Output [Ignition switch ON]
  • Engine coolant temperature: More than 60°C (140°F)
  • Accelerator pedal: Fully released → depressed
 Battery voltage appears for about 1 second.
52 (B) - ECM ground - - -
53 (G) 128 (B/Y) A/F sensor 1 heater Input [Engine is running]
  • Warm-up condition
  • Idle speed (More than 260 seconds after starting engine)
G08989234
54 (G) 128 (B/Y) Heated oxygen sensor 2 heater 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
G08989235
[Ignition switch: ON]
  • Engine stopped

[Engine is running]
  • Engine speed: Above 3, 600 rpm
 Battery voltage (11 - 14 V)
61 (BG) 62 (BR) Battery temperature sensor Input [Engine is running]
  • Battery temperature: 25°C (°F)
  • Idle speed
 3.3 V
62 (BR) - Sensor ground (Battery current sensor, battery temperature sensor) - - -
63 (G) 62 (BR) Battery current sensor Input [Engine is running]
  • Battery: Fully charged*
  • Idle speed
 2.6 - 3.5 V
64 (Y) - Sensor power supply (Battery current sensor) - [Ignition switch: ON] 5.0 V
70 (W) - Sensor ground [Crankshaft position sensor (POS)] - - -
71 (R) 70 (W) Crankshaft position sensor (POS) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G08989236
[Engine is running]
  • Engine speed: 2, 000 rpm
G08989237
72 (G) - Sensor power supply [Crankshaft position sensor (POS)] - [Ignition switch: ON] 5.0 V
73 (GR) - Shield - - -
77 (W) 78 (R) Throttle position sensor 2 Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully released
 Less than 4.75 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully depressed
 More than 0.36 V
78 (R) - Sensor ground (Throttle position sensor) - - -
79 (G) 78 (R) Throttle position sensor 1 Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully released
 More than 0.36 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D (CVT), 1st (M/T)
  • Accelerator pedal: Fully depressed
 Less than 4.75 V
80 (B) - Sensor power supply (Throttle position sensor) - [Ignition switch: ON] 5.0 V
81 (Y) 128 (B/Y) Power supply for ECM (Backup) Input [Ignition switch: OFF] Battery voltage (11 - 14 V)
83 (LG) 92 (V) Intake manifold runner control valve position sensor Input [Ignition switch ON]
  • Engine coolant temperature: Between 0°C (32°F) and 45°C (113°F)
  • Accelerator pedal: Fully released
 Less than 2.4 V
[Ignition switch ON]
  • Engine coolant temperature: Between 0°C (32°F) and 45°C (113°F)
  • Accelerator pedal: Slightly depressed
 More than 3.5 V
84 (W) - Sensor power supply (Intake manifold runner control valve position sensor) - [Ignition switch: ON] More than 4.98 V
86 (R) 128 (B/Y) Ignition signal No. 1 Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
G08989238
87 (LG) Ignition signal No. 2
90 (P) Ignition signal No. 3 [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 rpm
G08989239
91 (SB) Ignition signal No. 4
89 (GR) 128 (B/Y) ECM relay (Self shut-off) Output [Engine is running]
[Ignition switch: OFF]
  • A few seconds after turning ignition switch OFF
 0 - 1.0 V
[Ignition switch: OFF]
  • More than a few seconds after turning ignition switch OFF
 Battery voltage (11 - 14 V)
92 (LG) - Sensor ground (Intake manifold runner control valve position sensor) - - -
93 (LG) 128 (B/Y) Intake valve timing control solenoid valve Output [Engine is running]
  • Warm-up condition
  • Idle speed
 0 V
[Engine is running]
  • Warm-up condition
  • When revving engine up to 2, 000 rpm quickly
G08989240
94 (G) 128 (B/Y) Exhaust valve timing control solenoid valve Output [Engine is running]
  • Warm-up condition
  • Idle speed
 0 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 rpm
 Battery voltage (11 - 14 V)
97 (BR) 128 (GR) EVAP canister vent control valve Output [Ignition switch: ON] Battery voltage (11 - 14 V)
99 (P) - CAN communication line (CAN-L) Input/Output - -
100 (L) - CAN communication line (CAN-H) Input/Output - -
101 (G) 128 (B/Y) Starter relay cut off signal Input/Output [Ignition switch: ON] 0 V
[Engine is running]
  • Warm-up condition
  • Idle speed
 Battery voltage (11 - 14 V)
103 (P) 124 (Y) 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
104 (L) - Sensor power supply (Refrigerant pressure sensor) - [Ignition switch: ON] 5.0 V
105 (V) 128 (B/Y) Starter motor relay control signal Output [Engine is running]
  • Warm-up condition
  • Idle speed
  • Selector lever: D (CVT)
  • Shift lever: 1st (M/T)
  • Engine speed: Less than 1, 500 rpm
NOTE: To decrease engine speed, perform the DTC confirmation procedure B in P1650. Refer to "DTC LOGIC ".
 0 V
(While operating the starter motor)
[Engine is running]
  • Warm-up condition
  • Idle speed
 Battery voltage (11 - 14 V)
109 (O) 128 (B/Y) Ignition switch Input [Ignition switch: OFF] 0 V
[Ignition switch: ON] Battery voltage (11 - 14 V)
110 (P) 111 (B) ASCD steering switch 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]
  • ACCEL/RES switch: Pressed
 3 V
[Ignition switch: ON]
  • COAST/SET switch: Pressed
 2 V
111 (B) - Sensor ground (ASCD steering switch) - - -
113 (G) - Sensor power supply (EVAP control system pressure sensor) - [Ignition switch: ON] 5.0 V
114 (P) 124 (SB) EVAP control system pressure sensor Input [Ignition switch: ON] 0.5 - 4.6 V
115 (SB) 128 (B/Y) 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)
116 (G) 128 (B/Y) Brake pedal position switch Input [Ignition switch: OFF]
  • Brake pedal: Fully released
 Battery voltage (11 - 14 V)
[Ignition switch: OFF]
  • Brake pedal: Slightly depressed
 0 V
117 (BR) 128 (B/Y)
  • PNP signal (CVT)
  • Neutral switch (M/T)
 Input [Ignition switch: ON]
  • Selector lever: P or N (CVT)
  • Shifter lever: Neutral (M/T)
 Battery voltage (11 - 14 V)
[Ignition switch: ON]
  • Except above
 0 V
118 (O) - Sensor power supply (Accelerator pedal position sensor 2) - [Ignition switch: ON] 5.0 V
119 (W) 120 (Y) Accelerator pedal position sensor 2 Input [Ignition switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully released
 0.3 - 0.6 V
[Ignition switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully depressed
 1.95 - 2.4 V
120 (Y) - Sensor ground (Accelerator pedal position sensor 2) - - -
121 (G) 128 (B/Y) Power supply for ECM Input [Ignition switch: ON] Battery voltage (11 - 14 V)
122 (V) - Sensor power supply (Accelerator pedal position sensor 1) - [Ignition switch: ON] 5.0 V
123 (B/Y) - ECM ground - - -
124 (V) - Sensor ground (EVAP control system pressure sensor, refrigerant pressure sensor) - - -
126 (R) 127 (GR) Accelerator pedal position sensor 1 Input [Ignition switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully released
 0.6 - 0.9 V
[Ignition switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully depressed
 3.9 - 4.7 V
127 (GR) - Sensor ground (Accelerator pedal position sensor 1) - - -
128 (B/Y) - ECM ground - - -
*: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
*: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to "HOW TO HANDLE BATTERY ".
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