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Home >> Nissan-Datsun >> 2013 >> Xterra PRO-4X, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Introduction) >> Ecu Diagnosis Information >> ECM >> ECM Terminal and Reference Value >> ECM Inspection Table
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ECM Inspection Table

Specification data are reference values and are measured between each terminal and ground.

Pulse signal is measured by CONSULT.

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.
TERMINAL NO. WIRE COLOR ITEM CONDITION DATA (DC Voltage)
1 V Throttle control motor relay power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
2 L/W Throttle control motor (Close) [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully released
 0 - 14V(1)
G08710477
3 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)
G08710478
5 L/B Throttle control motor (Open) [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully depressed
 0 - 14V(1)
G08710479
6 R 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)
G08710480
9
10
11		 BR
G
Y		 Ignition signal No. 3
Ignition signal No. 2
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)
G08710481
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 0.1 - 0.4V(1)
G08710482
12 BR ECM ground [Engine is running] 
  • Idle speed
 Body ground
13
14
15		 P
SB
GR		 Ignition signal No. 6
Ignition signal No. 5
Ignition signal No. 4		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
NOTE: The pulse cycle changes depending on rpm at idle
 0 - 0.2V(1)
G08710483
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 500 rpm
 0.1 - 0.4V(1)
G08710484
16 V ECM ground [Engine is running] 
  • Idle speed
 Body ground
19 B Sensor ground (Throttle position sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
20 G Intake manifold runner control valve position sensor [Ignition switch: ON] 
  • Engine coolant temperature: Between - 12°C (10°F) and 20°C (68°F)
  • Accelerator pedal: Fully released
 Less than 1.4 V
[Ignition switch: ON] 
  • Engine coolant temperature: Between - 12°C (10°F) and 20°C (68°F)
  • Accelerator pedal: Slightly depressed
 More than 3.0 V
22 W Throttle position sensor 1 [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully released
 More than 0.36V
[Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully depressed
 Less than 4.75V
23 R Throttle position sensor 2 [Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully released
 Less than 4.75V
[Ignition switch: ON] 
  • Engine: Stopped
  • Shift lever: D (A/T), 1st (M/T)
  • Accelerator pedal: Fully depressed
 More than 0.36V
24 L Sensor power supply (Throttle position sensor) [Ignition switch: ON]  Approximately 5V
26 R/B Power supply for ECM (Backup) [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
31 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)
33
46
48		 SB
W
LG		 Fuel injector No. 1
Fuel injector No. 5
Fuel injector No. 3		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
 BATTERY VOLTAGE (11 - 14V)(1)
G08710485
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
 BATTERY VOLTAGE (11 - 14V)(1)
G08710486
34 O Throttle control motor relay [Ignition switch: OFF]  BATTERY VOLTAGE (11 - 14V)
[Ignition switch: ON]  0 - 1.0V
37 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)
39 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
41 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)
42 Y 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)
G08710487
[Engine is running] 
  • Engine speed: About 2, 000 rpm (More than 100 seconds after starting engine)
 BATTERY VOLTAGE (11 - 14V)(1)
G08710488
43 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)
44
45
47		 O
V
R		 Fuel injector No. 2
Fuel injector No. 6
Fuel injector No. 4		 [Engine is running] 
  • Warm-up condition 
  • Idle speed
    NOTE: The pulse cycle changes depending on rpm at idle
 BATTERY VOLTAGE (11 - 14V)(1)
G08710489
[Engine is running] 
  • Warm-up condition 
  • Engine speed: 2, 000 rpm
 BATTERY VOLTAGE (11 - 14V)(1)
G08710490
49 GR Intake manifold runner control valve motor power supply [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
50 BR Intake manifold runner control valve motor (Open) [Ignition switch: ON] 
  • Engine coolant temperature: Between - 12°C (10°F) and 20°C (68°F)
  • Accelerator pedal: Fully released → depressed
 Battery voltage appears for about 1 second.
53 Y Intake manifold runner control valve motor (Close) [Ignition switch: ON] 
  • Engine coolant temperature: Between - 12°C (10°F) and 20°C (68°F)
  • Accelerator pedal: Depressed → fully released
 Battery voltage appears for about 1 second.
54 O Sensor power supply (Intake manifold runner control valve position sensor) [Ignition switch: ON]  Approximately 5.0 V
55 L 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, 000 rpm
 7 - 12V(1)
G08710491
56 B 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, 000 rpm
 7 - 12V(1)
G08710492
57 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
58 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
59 GR Sensor ground (Heated oxygen sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
63 BR Refrigerant pressure sensor [Engine is running] 
  • Warm-up condition 
  • Both A/C switch and blower switch: ON (Compressor operates)
 1.0 - 4.0V
64 LG Sensor ground (Refrigerant pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
65 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
66 R Battery current sensor [Engine is running] 
  • Battery: Fully charged(2)
  • Idle speed
 Approximately 2.6 - 3.5V
68 B Sensor ground (Battery current sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
69 O/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.
70 Y Engine coolant temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with engine coolant temperature.
72 R Sensor ground (Power steering pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
73 W/L A/F sensor 1 (Bank 1) [Ignition switch: ON]  Approximately 2.2V
74 SB Intake air temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with intake air temperature.
75 P Sensor power supply (Battery current sensor) [Ignition switch: ON]  Approximately 5V
76 BR Sensor ground (Engine coolant temperature sensor, Engine oil temperature sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
77 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.
78 V Engine oil temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with engine oil temperature.
79 G Sensor power supply (Power steering pressure sensor) [Ignition switch: ON]  Approximately 5V
80 B Sensor ground (Mass air flow sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
81 B/R A/F sensor 1 (Bank 2) [Ignition switch: ON]  Approximately 2.2V
82 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
84 LG Sensor ground (Intake manifold runner control valve position sensor) - -
85 W Knock sensor (Bank 1) [Engine is running] 
  • Idle speed
 Approximately 2.5V
86 W Knock sensor (Bank 2) [Engine is running] 
  • Idle speed
 Approximately 2.5V
89 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)
G08710493
[Engine is running] 
  • Engine speed: 2, 000 rpm
 Approximately 10V(1)
G08710494
91 GR Sensor ground (Knock sensor) [Engine is running] 
  • Idle speed
 Body ground
93 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)
G08710495
[Engine is running] 
  • Engine speed: 2, 000 rpm
 1.0 - 4.0V(1)
G08710496
94 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)
G08710497
[Engine is running] 
  • Engine speed: 2, 000 rpm
 1.0 - 4.0V(1)
G08710498
96 P Sensor power supply (Refrigerant pressure sensor) [Ignition switch: ON]  Approximately 5V
97 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
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 L Sensor power supply (APP sensor 1) [Ignition switch: ON]  Approximately 5V
100 B Sensor ground (APP sensor 1) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
101 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
102 W EVAP control system pressure sensor [Ignition switch: ON]  Approximately 1.8 - 4.8V
103 LG Sensor power supply (APP sensor 2) [Ignition switch: ON]  Approximately 5V
104 V Data link connector [Ignition switch: ON] 
  • CONSULT or GST: disconnected
 Approximately 5V - Battery voltage (11 - 14V)
106 G EVAP canister vent control valve [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
107 SB Sensor power supply (EVAP control system pressure sensor) [Ignition switch: ON]  Approximately 5V
108 R Sensor ground (ASCD steering switch) - -
109 W/R Ignition switch [Ignition switch: OFF]  0V
[Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
111 Y Fuel tank temperature sensor [Engine is running]  Approximately 0 - 4.8V Output voltage varies with fuel tank temperature.
112 B Sensor ground (EVAP control system pressure sensor) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
113 P CAN communication line - -
114 L CAN communication line - -
116 O Sensor ground (APP sensor 2) [Engine is running] 
  • Warm-up condition 
  • Idle speed
 Approximately 0V
117 O(3)
G(4)		 PNP signal [Ignition switch: ON] 
  • Shift lever: P or N (A/T), Neutral (M/T)
 Approximately 0V
[Ignition switch: ON] 
  • Except above position
 BATTERY VOLTAGE (11 - 14V)
121 R Power supply for ECM [Ignition switch: ON]  BATTERY VOLTAGE (11 - 14V)
122 LG Stop lamp switch [Ignition switch: OFF] 
  • Brake pedal: Fully released
 Approximately 0V
[Ignition switch: OFF] 
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14V)
123
124		 V
GR		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
126 Y Brake pedal position switch [Ignition switch: ON] 
  • Brake pedal: Slightly depressed
 Approximately 0V
[Ignition switch: ON] 
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14V)
127
128		 B
BR		 ECM ground [Engine is running] 
  • Idle speed
 Body ground
(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 ".
(3) M/T models
(4) A/T models
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