LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2023 >> Sentra SR >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System (1 Of 2) >> Ecu Diagnosis Information >> ECM >> Physical Values
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Physical Values

TERMINAL LAYOUT 

GNSDB47702Courtesy of NISSAN

PHYSICAL VALUES 

NOTE: SYMBOL
  • 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 (G) 65 (B) Fuel injector No. 1, 4 (HI), Fuel injector No. 2, 3 (HI) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
GNSDB47433Courtesy of NISSAN
2 (P) [Engine is running]
  • Engine: after warming up
  • Engine speed: 2000 RPM
GNSDB47261Courtesy of NISSAN
3 (B) 65 (B) Fuel injector driver power supply 1 Input [Engine is running]
  • Engine: after warming up
  • Idle speed
Battery voltage (11 - 14 V)
4 (W) 65 (B) Fuel injector driver power supply 2 Input [Engine is running]
  • Engine: after warming up
  • Idle speed
Battery voltage (11 - 14 V)
5 (B) - ECM ground - - -
8 (R) 65 (B) Fuel injector No. 1 (LO), Fuel injector No. 2 (LO), Fuel injector No. 3 (LO), Fuel injector No. 4 (LO) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
GNSDB47130Courtesy of NISSAN
7 (GR)
9 (L) [Engine is running]
  • Engine: after warming up
  • Engine speed: 2000 RPM
GNSDB47336Courtesy of NISSAN
6 (W)
15 (BR) 162 (B) Park/Neutral position signal Input [Ignition switch: ON]
  • Selector lever: P or N position
Battery voltage (11 - 14 V)
[Ignition switch: ON]
  • Selector lever: Except above position
0 V
16 (BR) 17 (B) Crankshaft position sensor Input [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
4. 9 V SYMBOL
SYMBOLGNSDB48138Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
4. 8 V SYMBOL
SYMBOLGNSDB48183Courtesy of NISSAN
17 (B) - Sensor ground (Crankshaft position sensor) - - -
19 (P) - Sensor ground (Intake camshaft position sensor) - - -
20 (R) 19 (P) Intake camshaft position sensor Input [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
4. 3 V SYMBOL
SYMBOLGNSDB46666Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
4. 3 V SYMBOL
SYMBOLGNSDB47463Courtesy of NISSAN
21 (W) 17 (B) Sensor power supply (Crankshaft position sensor) Output [Ignition switch: ON] 5 V
22 (Y) 162 (B) Crankshaft position sensor (Electric intake valve timing control signal) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
4. 9 V SYMBOL
SYMBOLGNSDB46656Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
4. 7 V SYMBOL
SYMBOLGNSDB47465Courtesy of NISSAN
23 (B) - Sensor ground (Mass air flow sensor, intake air temperature sensor) - - -
24 (W) 19 (P) Sensor power supply (Intake camshaft position sensor) - [Ignition switch: ON] 5 V
25 (G) 162 (B) Intake camshaft position sensor (Electric intake valve timing control signal) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
4. 4 V SYMBOL
SYMBOLGNSDB37122Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
4. 4 V SYMBOL
SYMBOLGNSDB33244Courtesy of NISSAN
26 (R) 23 (B) Mass air flow sensor Input [Ignition switch: ON]
  • Engine stopped
3, 700 Hz
GNSDB42265Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 1, 500 RPM
5, 400 - 5, 900 Hz
GNSDB42265Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 500 RPM
5, 900-6, 400 Hz
GNSDB42265Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 4, 000 RPM
6, 400 Hz - 7, 200 Hz
GNSDB42265Courtesy of NISSAN
27 (L) 23 (B) Sensor power supply (Mass air flow sensor) Output [Ignition switch: ON] 5 V
28 (R) 30 (B) Sensor power supply (Exhaust camshaft position sensor) Output [Ignition switch: ON] 5 V
29 (L) 30 (B) Exhaust camshaft position sensor Input [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
4. 3 V SYMBOL
SYMBOLGNSDB46666Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
4. 3 V SYMBOL
SYMBOLGNSDB47463Courtesy of NISSAN
30 (B) - Sensor ground (Exhaust camshaft position sensor) - - -
32 (V) 23 (B) Intake air temperature sensor Input [Engine is running] 0 - 4.8 V Output voltage varies with intake air temperature.
33 (B) - Sensor ground (Engine coolant temperature sensor, exhaust gas temperature sensor) - - -
34 (BR) 33 (B) Engine coolant temperature sensor Input [Engine is running] 0 - 4.8 V Output voltage varies with engine coolant temperature.
37 (G) 33 (B) Engine oil temperature sensor Input [Engine is running] 0 - 4.8 V Output voltage varies with engine oil temperature.
39 (B) - Sensor ground (Engine oil temperature sensor) - - -
43 (Y) 45 (R) Sensor power supply (Fuel rail pressure sensor, refrigerant pressure sensor, engine oil pressure sensor) Output [Ignition switch: ON] 5 V
44 (P) 45 (R) Fuel rail pressure sensor Input [Engine is running]
  • Engine: after warming up
  • Idle speed
0. 82 - 1. 14 V
[Engine is running]
  • Engine: after warming up
  • Revving engine from idle to 4, 000 RPM
0. 82-2. 9
45 (R) - Sensor ground (Fuel rail pressure sensor, refrigerant pressure sensor, engine oil pressure sensor) - - -
46 (BR) 45 (R) Engine oil pressure sensor Input [Engine is running]
  • Engine: after warming up
  • Idle speed
1. 08 V
[Engine is running]
  • Engine speed: 2, 000 RPM
1. 76 V
48 (V) 45 (R) Refrigerant pressure sensor Input [Engine is running]
  • Engine: after warming up
  • Idle speed
  • A/C switch: ON (Compressor operates)
1. 0 - 4. 0 V
49 (SB) - Sensor ground (Manifold absolute pressure sensor) - - -
52 (G) 49 (SB) Manifold absolute pressure sensor Input [Ignition switch: ON] 2. 0 V
[Engine is running]
  • Engine: after warming up
  • Idle speed
1. 0 V
54 (Y) 49 (SB) Sensor power supply (Manifold absolute pressure sensor) Output [Ignition switch: ON] 5 V
62 (B) - Sensor ground (Knock sensor) - - -
63 (W) 62 (B) Knock sensor Input [Engine is running]
  • Idle speed
2. 5 V
65 (B) - ECM ground - - -
66 (SB) 69 (B) High pressure fuel pump relay Input [Engine is running]
  • Engine: after warming up
  • Idle speed
Battery voltage (11 - 14 V)
67 (W) 69 (B) High pressure fuel pump (HI) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
3. 1 V SYMBOL
SYMBOLGNSDB47579Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
4. 3 V SYMBOL
SYMBOLGNSDB47596Courtesy of NISSAN
68 (B) 69 (B) High pressure fuel pump (LO) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
2. 6 V SYMBOL
SYMBOLGNSDB48269Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
3. 5 V SYMBOL
SYMBOLGNSDB47046Courtesy of NISSAN
69 (B) - ECM ground - - -
70 (B) - Shield - - -
74 (W) 162 (B) ECM relay (Self shut-off) Input [Engine is running] [Ignition switch: OFF]
  • A few seconds after turning ignition switch OFF
0 - 1. 0 V
Output [Ignition switch: OFF]
  • More than a few seconds after turning ignition switch OFF
Battery voltage (11 - 14 V)
76 (R) - Sensor ground (Heated oxygen sensor 2) - - -
77 (L) 76 (R) 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 0. 6 V
Keeping the engine speed between 3, 500 and 4, 000 RPM for 1 minute and at idle for 1 minute under no load 0. 5 V
78 (LG) 79 (B) EGR volume control valve position sensor Input [Ignition switch: ON] 1 V or battery voltage (11 - 14 V) Output voltage varies with EGR volume control valve operating angle (step).
79 (B) - Sensor ground (EGR volume control valve position sensor, Intake manifold runner control valve position sensor) - - -
82 (GR) 83 (BR) Intake manifold runner control valve position sensor Input [Ignition switch ON] 4. 3 V
[Engine is running]
  • Engine cold condition
  • Engine speed: Idle
0. 8 V
[Engine is running]
  • Engine warm-up condition
  • Engine speed: Idle
4. 3 V
83 (BR) 79 (B) Sensor power supply (EGR volume control valve position sensor, Intake manifold runner control valve position sensor) - [Ignition switch: ON] 5 V
85 (B) 90 (G) Throttle position sensor 1 Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D position
  • Accelerator pedal: Fully released
0. 7 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D position
  • Accelerator pedal: Fully depressed
4. 03 V
86 (L) 162 (B) Air fuel ratio (A/F) sensor 1 Input [Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
2. 2 Varies with air fuel ratio.
87 (B) - Shield - - -
88 (G) 162 (B) Air fuel ratio (A/F) sensor 1 Input [Ignition switch: ON] 1. 8 V
89 (R) 90 (G) Throttle position sensor 2 Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D position
  • Accelerator pedal: Fully released
4. 26 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D position
  • Accelerator pedal: Fully depressed
0. 94 V
90 (G) - Sensor ground (Throttle position sensor 1, throttle position sensor 2) - - -
91 (LG) 162 (B) Intake manifold runner control valve (OPEN) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
0 V
[Engine is running]
  • Engine: after warming up
  • No load
  • Revving engine from idle to 3, 000 RPM
Generates a voltage for a moment (11 - 14 V)
92 (V) 162 (B) Intake manifold runner control valve (CLOSE) Output [Engine is running]
  • Engine: after warming up
  • Idle speed
0 V
[Engine is running]
  • Engine: after warming up
  • No load
  • When the engine speed is decreased from 3, 000 RPM to idle speed (Accelerator pedal is released)
Generates a voltage for a moment (11 - 14 V)
95 (W) 90 (G) Sensor power supply (Throttle position sensor 1, throttle position sensor 2) Output [Ignition switch: ON] 5 V
96 (W) 162 (B) Intake manifold runner control valve power supply Input [Engine is running]
  • Engine: after warming up
  • Idle speed
Battery voltage (11 - 14 V)
97 (Y) 162 (B) Throttle control motor relay Output [Ignition switch: OFF] Battery voltage (11 - 14 V)
[Ignition switch: ON] 0 - 1. 0 V
98 (L) 162 (B) LIN communication line Input/Output - -
99 (Y) 100 (G) EGR volume control valve (+) Output [Ignition switch: ON] 0 V
[Engine is running]
  • Engine: after warming up
  • Idle speed
1. 2 - 2. 1 V
100 (G) 99 (Y) EGR volume control valve (-) Output [Ignition switch: ON] 0 V
[Engine is running]
  • Engine: after warming up
  • Idle speed
0. 1 - 0. 2 V
109 (Y) 162 (B) Ignition signal No. 1, Ignition signal No. 2, Ignition signal No. 3, Ignition signal No. 4 Output [Engine is running]
  • Engine: after warming up
  • Idle speed
    NOTE: SYMBOL The pulse cycle changes depending on RPM at idle.
0. 2 V SYMBOL
SYMBOLGNSDB35119Courtesy of NISSAN
106 (LG)
105 (BR) [Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
0. 4 V SYMBOL
SYMBOLGNSDB46844Courtesy of NISSAN
103 (P)
104 (W) 162 (B) Intake manifold runner control valve power supply Input [Engine is running]
  • Engine: after warming up
  • Idle speed
Battery voltage (11 - 14 V)
115 (P) 162 (B) Exhaust valve timing control solenoid valve Output [Engine is running]
  • Engine: after warming up
  • Idle speed
GNSDB48080Courtesy of NISSAN
[Engine is running]
  • Engine: after warming up
  • Engine speed: 2, 000 RPM
8. 5 - 9. 0 V SYMBOL
SYMBOLGNSDB48080Courtesy of NISSAN
118 (GR) 162 (B) Fuel pump relay Output [Ignition switch: ON]
  • More than 1 second after turning ignition switch ON

[Engine is running]
0. 8 V
[Ignition switch: ON]
  • 1 second after turning ignition switch ON
Battery voltage (11 - 14 V)
122 (SB) 162 (B) EVAP canister purge volume control solenoid valve Output [Engine is running]
  • Idle speed
  • Accelerator pedal: Fully released after starting engine
Battery voltage (11 - 14 V)
[Engine is running]
  • Engine speed: 2, 000 RPM (Passing 100 seconds after starting engine)
10 V SYMBOL
SYMBOLGNSDB46914Courtesy of NISSAN
123 (BR) 162 (B) Battery power supply Input [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V) (11 - 14 V)
124 (R) - CAN - L Input/Output - -
125 (GR) - CAN - H Input/Output - -
126 (W) 162 (B) Air fuel ratio (A/F) sensor 1 heater Input [Engine is running]
  • Engine: after warming up
  • Idle speed (More than 140 seconds after starting engine)
11 V SYMBOL
SYMBOLGNSDB47591Courtesy of NISSAN
127 (BR) 76 (R) 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
10 V SYMBOL
SYMBOLGNSDB48097Courtesy of NISSAN
[Ignition switch: ON]
  • Engine: Stopped

[Engine is running]
  • Engine speed: More than 3, 600 RPM
Battery voltage (11 - 14 V)
128 (R) 162 (B) Throttle control motor power supply Input [Ignition switch: ON] Battery voltage (11 - 14 V)
129 (L) 162 (B) Throttle control motor (OPEN) Output [Ignition switch: ON]
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully depressed
2. 25 - 2. 45 V SYMBOL
SYMBOLGNSDB47977Courtesy of NISSAN
130 (Y) 162 (B) Throttle control motor (CLOSE) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D position
  • Accelerator pedal: Fully released
1. 77 - 2. 03 V SYMBOL
SYMBOLGNSDB48154Courtesy of NISSAN
131 (G) 158 (G) EVAP control system pressure sensor Input Not applied 0.5 - 4.6 V
[Applied vacuum -26.7 kPa (-0. 272 kg/cm2, -3.87 psi)] 2. 1 to 2. 5 V lower than above value
133 (P) - CAN - L Input/Output - -
134 (L) - CAN - H Input/Output - -
135 (P) 162 (B) Sensor power supply (EVAP control system pressure sensor) Output [Ignition switch: ON] Battery voltage (11 - 14 V)
138 (SB) 158 (V) Fuel tank temperature sensor Input [Engine is running] 0 - 4.8 V Output voltage varies with fuel temperature
142 (R) 162 (B) Clutch pedal position switch Input [Ignition switch: ON]
  • Clutch pedal: Fully released
0 V
[Ignition switch: ON]
  • Clutch pedal: Fully depressed
Battery voltage (11 - 14 V)
143 (L) 162 (B) Ignition switch Input [Ignition switch: OFF] 0 V
[Ignition switch: ON] Battery voltage (11 -14 V)
144 (P) 145 (B) ASCD steering switch Input [Ignition switch: ON]
  • ASCD steering switch: OFF
4. 0 V
[Ignition switch: ON]
  • MAIN switch: Pressed
0 V
[Ignition switch: ON]
  • CANCEL switch: Pressed
1. 0 V
[Ignition switch: ON]
  • SET - switch: Pressed
2. 0 V
[Ignition switch: ON]
  • RES + switch: Pressed
3. 0 V
145 (B) - ASCD steering switch ground - - -
147 (P) - Drive train CAN - L Input/Output - -
148 (L) - Drive train CAN - H Input/Output - -
150 (G) 162 (B) Brake pedal position switch Input [Ignition switch: OFF]
  • Brake pedal: Fully released
Battery voltage (11 - 14 V)
[Ignition switch: OFF]
  • Brake pedal: Depressed
0 V
151 (Y)   EVAP canister vent control valve Output [Ignition switch: ON] Battery voltage (11 - 14 V)
152 (BR) 154 (Y) Sensor power supply (Accelerator pedal position sensor 2) Output [Ignition switch: ON] 5 V
153 (B) 154 (Y) Accelerator pedal position sensor 2 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
154 (Y) - Sensor ground (Accelerator pedal position sensor 2) - - -
155 (G) 162 (B) ECM power supply Input [Ignition switch: ON] Battery voltage (11 - 14 V)
156 (V) 161 (R) Sensor power supply (Accelerator pedal position sensor 1) Output [Ignition switch: ON] 5 V
157 (B) - ECM ground - - -
158 (R)   Sensor ground (EVAP control system pressure sensor, fuel tank temperature sensor) - - -
159 (B) - ECM ground - - -
160 (L) 161 (R) Accelerator pedal position sensor 1 Input [Ignition switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully released
0. 3 - 0. 6 V
[Ignition switch: ON]
  • Engine stopped
  • Accelerator pedal: Fully depressed
3. 9 - 4. 7
161 (R) - Sensor ground (Accelerator pedal position sensor 1) - - -
162 (B) - ECM ground - - -

SYMBOL : Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)