LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2008 >> Sentra SE-R >> Repair and Diagnosis >> External Pages >> Different car >> Section 191 (Engine Control System - Introduction) >> Trouble Diagnosis >> ECM Terminals and Reference Value >> ECM Inspection Table
April 5, 2026: LEMON Manuals is launched! Read the announcement.

ECM Inspection Table

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. 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-II.

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.
ECM INSPECTION CHART

TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
1 BR ECM ground [Engine is running] 
  • Idle speed
 Body ground
2 G A/F sensor 1 heater (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed

(More than 140 seconds after starting engine)		 Approximately 2.9 - 8.8V(1)
G04900085Courtesy of NISSAN MOTOR CO., U.S.A.
3 V Throttle control motor relay power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
4 L/W Throttle control motor (Close) [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D
  • Accelerator pedal: Fully released
 0 - 14V(1)
G04900086Courtesy of NISSAN MOTOR CO., U.S.A.
5 L/B Throttle control motor (Open) [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D
  • Accelerator pedal: Fully depressed
 0 - 14V(1)
G04900087Courtesy of NISSAN MOTOR CO., U.S.A.
6 R Heated oxygen sensor 2 heater (Bank 2) [Engine is running] 
  • Engine speed is 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
 0 - 1.0V
[Ignition switch: ON] 
  • Engine: Stopped

[Engine is running] 
  • Engine speed: Above 3, 600 rpm
 BATTERY VOLTAGE (11 - 14V)
10 W Intake valve timing control solenoid valve (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 7 - 12V(1)
G04900088Courtesy of NISSAN MOTOR CO., U.S.A.
11 LG Intake valve timing control solenoid valve (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 7 - 12V(1)
G04900088Courtesy of NISSAN MOTOR CO., U.S.A.
12 P Power steering pressure sensor [Engine is running] 
  • Steering wheel: Being turned
 0.5 - 4.5V
[Engine is running] 
  • Steering wheel: Not being turned
 0.4 - 0.8V
13 G Crankshaft position sensor (POS) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
 Approximately 10V(1)
G04900090Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm
 Approximately 10V(1)
G04900091Courtesy of NISSAN MOTOR CO., U.S.A.
14 Y Camshaft position sensor (PHASE) (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
 1.0 - 4.0V(1)
G04900092Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm
 1.0 - 4.0V(1)
G04900093Courtesy of NISSAN MOTOR CO., U.S.A.
15 W Knock sensor (Bank 1) [Engine is running] 
  • Idle speed
 Approximately 2.5V
16 BR 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.
21
22
23		 W
LG
SB		 Fuel injector No. 5
Fuel injector No. 3
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)
G04900094Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
 BATTERY VOLTAGE (11 - 14V)(1)
G04900095Courtesy of NISSAN MOTOR CO., U.S.A.
24
43		 G
G		 A/F sensor 1 heater (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed

(More than 140 seconds after starting engine)		 Approximately 2.9 - 8.8V(1)
G04900085Courtesy of NISSAN MOTOR CO., U.S.A.
25 P 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
 0 - 1.0V
[Ignition switch: ON] 
  • Engine: Stopped

[Engine is running] 
  • Engine speed: Above 3, 600 rpm
 BATTERY VOLTAGE (11 - 14V)
29 G VIAS control solenoid valve [Engine is running] 
  • Idle speed
 BATTERY VOLTAGE (11 - 14V)
[Engine is running] 
  • Engine speed: Between 2, 200 and 3, 300 rpm
 0 - 1.0V
32 W EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
33 L Camshaft position sensor (PHASE) (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
 1.0 - 4.0V(1)
G04900092Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 rpm
 1.0 - 4.0V(1)
G04900093Courtesy of NISSAN MOTOR CO., U.S.A.
34 BR Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with intake air temperature.
35 O 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.
36 W Knock sensor (Bank 2) [Engine is running] 
  • Idle speed
 Approximately 2.5V
40
41
42		 V
R
O		 Fuel injector No. 6
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)
G04900094Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
 BATTERY VOLTAGE (11 - 14V)(1)
G04900095Courtesy of NISSAN MOTOR CO., U.S.A.
45 R EVAP canister purge volume control solenoid valve [Engine is running] 
  • Idle speed
  • Accelerator pedal is not depressed even slightly, after engine starting
 BATTERY VOLTAGE (11 - 14V)(1)
G04900099Courtesy of NISSAN MOTOR CO., U.S.A.
  • Engine speed: About 2, 000 rpm (More than 100 seconds after starting engine)
 BATTERY VOLTAGE (11 - 14V)(1)
G04900100Courtesy of NISSAN MOTOR CO., U.S.A.
47 L Sensor power supply (Throttle position sensor) [Ignition switch: ON]  Approximately 5V
48 SB Sensor power supply
(EVAP control system pressure sensor)		 [Ignition switch: ON]  Approximately 5V
49 P Sensor power supply (Refrigerant pressure sensor/Battery current sensor) [Ignition switch: ON]  Approximately 5V
50 W Throttle position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D
  • Accelerator pedal: Fully depressed
 Less than 4.75V
51 P 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
55 G 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
56 LG A/F sensor 1 (Bank 1) [Ignition switch: ON]  Approximately 2.2V
60
61
62		 SB
L
Y		 Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
 0 - 0.2V(1)
G04911515Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 0.1 - 0.4V(1)
G04911516Courtesy of NISSAN MOTOR CO., U.S.A.
66 B Sensor ground (Throttle position sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
67 B Sensor ground [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
68 G Sensor power supply (Power steering pressure sensor) [Ignition switch: ON]  Approximately 5V
69 R Throttle position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D
  • Accelerator pedal: Fully depressed
 More than 0.36V
70 BR Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower switch: ON (Compressor operates)
 1.0 - 4.0V
71 R Battery current sensor [Engine is running] 
  • Battery: Fully charged(2)
  • Idle speed
 Approximately 2.6 - 3.5V
73 Y Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with engine coolant temperature.
74 W 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
75 P A/F sensor 1 (Bank 2) [Ignition switch: ON]  Approximately 2.2V
78 GR Sensor ground (Heated oxygen sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
79
80
81		 P
GR
G		 Ignition signal No. 6
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 - 0.2V(1)
G04911515Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 0.1 - 0.4V(1)
G04911516Courtesy of NISSAN MOTOR CO., U.S.A.
82 B Sensor ground (APP sensor 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
83 B Sensor ground (APP sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
85 W Data link connector [Ignition switch: ON] 
  • CONSULT-II or GST: disconnected
 Approximately 5V - Battery voltage (11 - 14V)
86 P CAN communication line [Ignition switch: ON]  Approximately 1.1 - 2.3V
Output voltage varies with the communication status.
90 L Sensor power supply (APP sensor 1) [Ignition switch: ON]  Approximately 5V
91 G Sensor power supply (APP sensor 2) [Ignition switch: ON]  Approximately 5V
94 L CAN communication line [Ignition switch: ON]  Approximately 2.6 - 3.2V
Output voltage varies with the communication status.
98 GR 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 2.0
99 SB 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 LG 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 PNP switch [Ignition switch: ON] 
  • Shift lever: P or N
 Approximately 0V
[Ignition switch: ON] 
  • Except above position
 BATTERY VOLTAGE (11 - 14V)
104 O Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
106 R 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 Y Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with fuel tank temperature.
108 LG ASCD brake switch [Ignition switch: ON] 
  • Brake pedal: Slightly depressed
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14V)
109 W/R Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
111 BR ECM relay (Self shut-off) [Engine is running] 
[Ignition switch: OFF] 
  • For a few seconds after turning ignition switch OFF
 0 - 1.5V
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
 BATTERY VOLTAGE (11 - 14V)
113 V Fuel pump relay [Ignition switch: ON] 
  • For 1 second after turning ignition switch ON

[Engine is running] 		 0 - 1.5V
[Ignition switch: ON] 
  • More than 1 second after turning ignition switch ON
 BATTERY VOLTAGE (11 - 14V)
115
116		 B
GR		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
117 G EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
119
120		 R
P		 Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
121 R/B 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.)
(2) Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to "SPECIFIC GRAVITY CHECK ".
scientia non olet · About LEMON Manuals