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ECM Inspection Table

WARNING: This page is about a different car, the 2012 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.

CAUTION: Never 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 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 - 8.8 V(1)
G08164805Courtesy of NISSAN NORTH AMERICA, INC.
3 V Throttle control motor power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14 V)
4 L/W Throttle control motor (Close) [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully released
 0 - 14 V(1)
G08164806Courtesy of NISSAN NORTH AMERICA, INC.
5 L/B Throttle control motor (Open) [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully depressed
 0 - 14 V(1)
G08164807Courtesy of NISSAN NORTH AMERICA, INC.
6 R 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 - 1.0 V
[Ignition switch: ON] 
  • Engine: Stopped

    [Engine is running] 

  • Engine speed: Above 3, 600 RPM
 BATTERY VOLTAGE (11 - 14 V)
10 W Intake valve timing control solenoid valve (bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14 V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 7 - 12 V(1)
G08164808Courtesy of NISSAN NORTH AMERICA, INC.
11 LG Intake valve timing control solenoid valve (bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 BATTERY VOLTAGE (11 - 14 V)
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 7 - 12 V(1)
G08164809Courtesy of NISSAN NORTH AMERICA, INC.
12 P Power steering pressure sensor [Engine is running] 
  • Steering wheel: Being turned
 0.5 - 4.5 V
[Engine is running] 
  • Steering wheel: Not being turned
 0.4 - 0.8 V
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 10 V(1)
G08164810Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 RPM
 Approximately 10 V(1)
G08164811Courtesy of NISSAN NORTH AMERICA, INC.
14 SB Camshaft position sensor (PHASE) [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on RPM at idle
 1.0 - 4.0 V(1)
G08164812Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: 2, 000 RPM
 1.0 - 4.0 V(1)
G08164813Courtesy of NISSAN NORTH AMERICA, INC.
15 W Knock sensor (bank 1) [Engine is running] 
  • Idle speed
 Approximately 2.5 V
16 L A/F sensor 1 (bank 2) [Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 Approximately 1.8 V
Output voltage varies with air fuel ratio.
21
22
23
44		 L
V
G
L		 Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 7		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on RPM at idle
 BATTERY VOLTAGE (11 - 14 V)(1)
G08164814Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE (11 - 14 V)(1)
G08164815Courtesy of NISSAN NORTH AMERICA, INC.
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 - 8.8 V(1)
G08164816Courtesy of NISSAN NORTH AMERICA, INC.
25 P Heated oxygen sensor 2 heater (bank 2) [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 - 1.0 V
[Ignition switch: ON] 
  • Engine: Stopped

    [Engine is running] 

  • Engine speed: Above 3, 600 RPM
 BATTERY VOLTAGE (11 - 14 V)
32 W EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8 V
34 BR Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8 V
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 1.8 V
Output voltage varies with air fuel ratio.
36 W Knock sensor (bank 2) [Engine is running] 
  • Idle speed
 Approximately 2.5 V
40
41
42
63		 V
R
O
W		 Fuel injector No. 6
Fuel injector No. 4
Fuel injector No. 2
Fuel injector No. 8		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on RPM at idle
 BATTERY VOLTAGE (11 - 14 V)(1)
G08164817Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE (11 - 14 V)
G08164818Courtesy of NISSAN NORTH AMERICA, INC.
45 R EVAP canister purge volume control solenoid valve [Engine is running] 
  • Idle speed
  • Accelerator pedal: Not depressed even slightly, after engine starting
 BATTERY VOLTAGE (11 - 14 V)(1)
G08164819Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Engine speed: About 2, 000 RPM (More than 100 seconds after starting engine)
 BATTERY VOLTAGE (11 - 14 V)
G08164820Courtesy of NISSAN NORTH AMERICA, INC.
46
60
61
62		 LG
V
L
Y		 Ignition signal No. 7
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 - 0.3 V(1)
G08164821Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 0.1 - 0.6 V(1)
G08164822Courtesy of NISSAN NORTH AMERICA, INC.
47 L Sensor power supply (Throttle position sensor) [Ignition switch: ON]  Approximately 5 V
48 SB Sensor power supply (EVAP control system pressure sensor) [Ignition switch: ON]  Approximately 5 V
49 P Sensor power supply (Refrigerant pressure sensor) [Ignition switch: ON]  Approximately 5 V
50 W Throttle position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully released
 More than 0.36 V
[Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully depressed
 Less than 4.75 V
51 P Mass air flow sensor [Engine is running] 
  • Warm-up condition 
  • Idle speed
 1.0 - 1.3 V
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 1.7 - 2.1 V
53 L Intake valve timing control position sensor (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0 - 1.0 V
[Engine is running] 
  • Engine speed: 2, 000 RPM
 0 - 1.0 V(1)
G08164823Courtesy of NISSAN NORTH AMERICA, INC.
55 G 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 1.0 V
56 W A/F sensor 1 (bank 1) [Ignition switch: ON]  Approximately 2.2 V
65
79
80
81		 GR
P
GR
G		 Ignition signal No. 8
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 - 0.3 V(1)
G08164824Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 0.1 - 0.6 V(1)
G08164825Courtesy of NISSAN NORTH AMERICA, INC.
66 B Sensor ground (Throttle position sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0 V
67 B Sensor ground [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0 V
68 G Sensor power supply (PSP sensor) [Ignition switch: ON]  Approximately 5 V
69 R Throttle position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully released
 Less than 4.75 V
[Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D position
  • Accelerator pedal: Fully depressed
 More than 0.36 V
70 BR Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower fan switch: ON (Compressor: Operates.)
 1.0 - 4.0 V
71 R Battery current sensor [Engine is running] 
  • Battery: Fully charged(1)
  • Idle speed
 Approximately 2.6 - 3.5 V
72 Y Intake valve timing control position sensor (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0 -1.0 V
[Engine is running] 
  • Engine speed: 2, 000 RPM
 0 - 1.0 V(1)
G08164826Courtesy of NISSAN NORTH AMERICA, INC.
73 Y Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8 V
Output voltage varies with engine coolant temperature.
74 SB 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 1.0 V
75 P A/F sensor 1 (bank 2) [Ignition switch: ON]  Approximately 2.2 V
78 GR Sensor ground (Heated oxygen sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0 V
82 B Sensor ground (APP sensor 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0 V
83 B Sensor ground (APP sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0 V
85 W Data link connector - -
86 P CAN communication line - -
90 L Sensor power supply (APP sensor 1) [Ignition switch: ON]  Approximately 5 V
91 G Sensor power supply (APP sensor 2) [Ignition switch: ON]  Approximately 5 V
94 L CAN communication line - -
98 GR Accelerator pedal position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully released
 0.28 - 0.48 V
[Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully depressed
 More than 2.0 V
99 SB ASCD steering switch [Ignition switch: ON] 
  • ASCD steering switch: OFF
 Approximately 4 V
[Ignition switch: ON] 
  • MAIN switch: Pressed
 Approximately 0V
[Ignition switch: ON] 
  • CANCEL switch: Pressed
 Approximately 1 V
[Ignition switch: ON] 
  • RESUME/ACCELERATE switch: Pressed
 Approximately 3 V
[Ignition switch: ON] 
  • SET/COAST switch: Pressed
 Approximately 2 V
101 LG Stop lamp switch [Ignition switch: OFF] 
  • Brake pedal: Fully released
 Approximately 0 V
[Ignition switch: OFF] 
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14 V)
102 G PNP signal [Ignition switch: ON] 
  • Selector lever: P or N position
 Approximately 0 V
[Ignition switch: ON] 
  • Selector lever: Except above position
 BATTERY VOLTAGE (11 - 14 V)
104 O Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14 V)
[Ignition switch: ON]  0 - 1.0 V
106 R Accelerator pedal position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully released
 0.65 - 0.87 V
[Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully depressed
 More than 4.3 V
107 Y Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8 V
Output voltage varies with fuel tank temperature.
108 LG ASCD brake switch [Ignition switch: ON] 
  • Brake pedal: Slightly depressed
 Approximately 0 V
[Ignition switch: ON] 
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14 V)
109 W/R Ignition switch [Ignition switch: OFF]  0 V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14 V)
111 BR ECM relay (Self shut-off) [Engine is running] 
[Ignition switch: OFF] 
  • For a few seconds after turning ignition switch OFF
 0 - 1.5 V
[Ignition switch: OFF] 
  • More than a few seconds after turning ignition switch OFF
 BATTERY VOLTAGE (11 - 14 V)
113 V Fuel pump relay [Ignition switch: ON] 
  • For 1 second after turning ignition switch ON

[Engine is running] 		 0 - 1.5 V
[Ignition switch: ON] 
  • More than 1 second after turning ignition switch ON
 BATTERY VOLTAGE (11 - 14 V)
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 - 14 V)
119
120		 R
P		 Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14 V)
121 R/B Power supply for ECM (Back up) [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14 V)
(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 "HOW TO HANDLE BATTERY ".
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