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ECM Inspection Table

WARNING: This page is about a different car, the 2008 Infiniti QX56. 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-III.

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 B ECM ground [Engine is running] 
  • Idle speed
 Body ground
2 LG/B 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)
G04896959Courtesy of NISSAN MOTOR CO., U.S.A.
3 L 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
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14V(1)
G04897294Courtesy of NISSAN MOTOR CO., U.S.A.
5 L/B Throttle control motor (Open) [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 0 - 14V(1)
G04897295Courtesy of NISSAN MOTOR CO., U.S.A.
6 GR 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)
10 W 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, 000rpm
 7 - 12V(1)
G04894537Courtesy of NISSAN MOTOR CO., U.S.A.
11 LG 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, 000rpm
 7 - 12V(1)
G04894537Courtesy of NISSAN MOTOR CO., U.S.A.
12 R 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 O 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)
G04897014Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 RPM
 Approximately 10V(1)
G04897015Courtesy of NISSAN MOTOR CO., U.S.A.
14 Y 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)
G04897025Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: 2, 000 RPM
 1.0 - 4.0V(1)
G04897026Courtesy of NISSAN MOTOR CO., U.S.A.
15 W Knock sensor (bank 1) [Engine is running] 
  • Idle speed
 Approximately 2.5V
16 G/L 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.
21
22
23
44		 O/L
BR
GR/W
O		 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 - 14V)(1)
G04896960Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE (11 - 14V)(1)
G04896961Courtesy of NISSAN MOTOR CO., U.S.A.
24
43		 GR/G
GR/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)
G04896959Courtesy of NISSAN MOTOR CO., U.S.A.
25 O/G 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 - 1.0V
[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 R/B Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with intake air temperature.
35 BR/R 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
63		 Y/G
P
L
G		 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 - 14V)(1)
G04896960Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE (11 - 14V)(1)
G04896961Courtesy of NISSAN MOTOR CO., U.S.A.
45 L/Y 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)
G04897069Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Engine speed: About 2, 000 RPM (More than 100 seconds after starting engine)
 BATTERY VOLTAGE (11 - 14V)(1)
G04897070Courtesy of NISSAN MOTOR CO., U.S.A.
47 Y 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 R/Y Sensor power supply
(Refrigerant pressure sensor)		 [Ignition switch: ON]  Approximately 5V
50 B Throttle position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 Less than 4.75V
51 W Mass air flow sensor [Engine is running] 
  • Warm-up condition 
  • Idle speed
 1.0 - 1.3V
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 1.7 - 2.1V
53 L Intake valve timing control position sensor (Bank 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0 - 1.0V
[Engine is running] 
  • Engine speed: 2, 000 RPM
 0 - 1.0V(1)
G05378546Courtesy of NISSAN MOTOR CO., U.S.A.
55 R 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
56 BR/G A/F sensor 1 (bank 1) [Ignition switch: ON]  Approximately 2.2V
46
60
61
62		 L/R
GR/R
O/W
Y/R		 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 - 0.3V(1)
G04897415Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 0.1 - 0.6V(1)
G04897416Courtesy 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 Sensor ground [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
68 W/L Sensor power supply
(PSP sensor)		 [Ignition switch: ON]  Approximately 5V
69 W Throttle position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine: Stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 More than 0.36V
70 B/W Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower fan 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
72 Y Intake valve timing control position sensor (Bank 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 0 - 1.0V
[Engine is running] 
  • Engine speed: 2, 000rpm
 0 - 1.0V(1)
G05378546Courtesy of NISSAN MOTOR CO., U.S.A.
73 Y/B Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with engine coolant temperature.
74 L 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
75 L/P A/F sensor 1 (bank 2) [Ignition switch: ON]  Approximately 2.2V
78 B/W Sensor ground
(Heated oxygen sensor 2)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
65
79
80
81		 G/R
V/W
W/R
W/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 - 0.3V(1)
G04900101Courtesy of NISSAN MOTOR CO., U.S.A.
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 RPM
 0.1 - 0.6V(1)
G04900102Courtesy of NISSAN MOTOR CO., U.S.A.
82 B/R Sensor ground
(APP sensor 1)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
83 G/W Sensor ground
(APP sensor 2)		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
86 P CAN communication line - -
90 L Sensor power supply
(APP sensor 1)		 [Ignition switch: ON]  Approximately 5V
91 W/R Sensor power supply
(APP sensor 2)		 [Ignition switch: ON]  Approximately 5V
94 L CAN communication line - -
98 G/R Accelerator pedal position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully released
 0.25 - 0.50V
[Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully depressed
 2.0 - 2.5V
99 G/R ASCD steering switch
(Models with ICC system)		 [Ignition switch: ON] 
  • ICC steering switch: OFF
 Approximately 4.3V
[Ignition switch: ON] 
  • MAIN switch: Pressed
 Approximately 0V
[Ignition switch: ON] 
  • CANCEL switch: Pressed
 Approximately 1.3V
[Ignition switch: ON] 
  • RESUME/ACCELERATE switch: Pressed
 Approximately 3.7V
[Ignition switch: ON] 
  • SET/COAST switch: Pressed
 Approximately 3V
[Ignition switch: ON] 
  • DISTANCE switch: Pressed
 Approximately 2.2V
99 G/R ASCD steering switch
(Models with ASCD system)		 [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/W Stop lamp switch [Ignition switch: OFF] 
  • Brake pedal: Fully released
 Approximately 0V
[Ignition switch: OFF] 
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14V)
102 GR/R PNP switch [Ignition switch: ON] 
  • Selector lever: P or N
 Approximately 0V
[Ignition switch: ON] 
  • Except the above gear 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 BR/W Accelerator pedal position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully released
 0.5 - 1.0V
[Ignition switch: ON] 
  • Engine: Stopped
  • Accelerator pedal: Fully depressed
 4.2 - 4.8V
107 V/R Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V
Output voltage varies with fuel tank temperature.
108 BR/W ICC brake switch
(Models with ICC system)
ASCD brake switch
(Models with ASCD system)		 [Ignition switch: ON] 
  • Brake pedal: Slightly depressed
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14V)
109 L/W Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
111 W/B 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 GR 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
B/W		 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		 BR
BR		 Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
121 W 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 ON-VEHICLE REPAIR .
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