2012 Infiniti M35hFACTORY OEM SERVICE PROCEDURE

Physical Values

NOTE:
  • ECM is located behind the instrument assist lower panel. For this inspection, remove passenger side instrument lower panel.
  • Specification data are reference values and are measured between each terminal and ground.
  • Pulse signal is measured by CONSULT.
  • If necessary, perform "INSPECTION MODE 5". Refer to "DESCRIPTION ".
Terminal No. (Wire color) Description Condition Value (Approx.)
+ - Signal name Input/Output
1 (W) 128 (B) A/F sensor 1 heater (bank 1) Output [Engine is running]
  • Warm-up condition
  • Idle speed

    (More than 140 seconds after starting engine)

 2.9 - 8.8 V(1)
G08255591Courtesy of NISSAN NORTH AMERICA, INC.
2 (G) 128 (B) Throttle control motor (Open) (bank 1) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 0 - 14 V(1)
G08255592Courtesy of NISSAN NORTH AMERICA, INC.
        [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14 V(1)
G08255593Courtesy of NISSAN NORTH AMERICA, INC.
3 (R) 128 (B) Throttle control motor power supply (bank 1) Input [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
4 (BR) 128 (B) Throttle control motor (Close) (bank 1) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: In the middle of releasing operation
 0 - 14 V(1)
G08255594Courtesy of NISSAN NORTH AMERICA, INC.
5 (L) 128 (B) A/F sensor 1 heater (bank 2) Output [Engine is running]
  • Warm-up condition
  • Idle speed

    (More than 140 seconds after starting engine)

 2.9 - 8.8 V(1)
G08255595Courtesy of NISSAN NORTH AMERICA, INC.
6 (SB) 128 (B) Exhaust valve timing control solenoid valve (bank 1) Output [Engine is running]
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE (11 - 14 V)
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000rpm
 7 - 12 V(1)
G08255596Courtesy of NISSAN NORTH AMERICA, INC.
7 (Y) 128 (B) Exhaust valve timing control solenoid valve (bank 2) Output [Engine is running]
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE (11 - 14 V)
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000rpm
 7 - 12 V(1)
G08255597Courtesy of NISSAN NORTH AMERICA, INC.
8 (B) - ECM ground - - -
11 (GR) 128 (B) Ignition signal No. 4 Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 0 - 0.2 V(1)
G08255598Courtesy of NISSAN NORTH AMERICA, INC.
12 (L) Ignition signal No. 3
15 (LG) Ignition signal No. 5
16 (G) Ignition signal No. 2 [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 0.1 - 0.4 V(1)
G08255599Courtesy of NISSAN NORTH AMERICA, INC.
19 (SB) Ignition signal No. 6
20 (Y) Ignition signal No. 1
17 (P) 128(B) Heated oxygen sensor 2 heater (bank 1) Output [Engine is running]
  • Engine speed: Below 3, 000 RPM after the following conditions are met
    • Engine: after warming up
    • Keeping the engine speed at 3, 000 RPM for 1 minute and at idle for 1 minute under no load
 10 V(1)
G08255600Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition switch: ON]
  • Engine stopped

[Engine is running]
  • Engine speed: Above 3, 000 RPM
 BATTERY VOLTAGE(11 - 14 V)
18 (Y) 128 (B) Intake valve timing control solenoid valve (bank 1) Output [Engine is running]
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE (11 - 14 V)
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000rpm
 7 - 12 V(1)
G08255601Courtesy of NISSAN NORTH AMERICA, INC.
21 (GR) 128 (B) EVAP canister purge volume control solenoid valve Output [Engine is running]
  • Idle speed
  • Accelerator pedal: Not depressed even slightly, after engine starting
 BATTERY VOLTAGE (11 - 14 V)(1)
G08255602Courtesy 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)(1)
G08255603Courtesy of NISSAN NORTH AMERICA, INC.
22 (LG) 128 (B) Fuel pump relay Output [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)
24 (V) 128 (B) ECM relay (Self shut-off) Output [Engine is running] [Ignition switch: OFF]
  • 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)
25 (O) 128 (B) Throttle control motor relay Output [Ignition switch: ON → OFF] 0 - 1.0 V
↓
BATTERY VOLTAGE (11 - 14 V)
↓
0 V
[Ignition switch: ON] 0 - 1.0 V
29 (Y) 128 (B) Intake valve timing control solenoid valve (bank 2) Output [Engine is running]
  • Warm-up condition
  • Idle speed
 BATTERY VOLTAGE (11 - 14 V)
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000rpm
 7 - 12 V(1)
G08255604Courtesy of NISSAN NORTH AMERICA, INC.
30 (O) 40 (O/L) Throttle position sensor 1 (bank 1) Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 More than 0.36 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 Less than 4.75 V
31 (O/L) 48 (O) Throttle position sensor 1 (bank 2) Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 More than 0.36 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 Less than 4.75 V
33 (LG) 128 (B) Heated oxygen sensor 2 heater (bank 2) Output [Engine is running]
  • Engine speed: Below 3, 000 RPM after the following conditions are met
    • Engine: after warming up
    • Keeping the engine speed at 3, 000 RPM for 1 minute and at idle for 1 minute under no load
 10 V(1)
G08255605Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition switch: ON]
  • Engine stopped

[Engine is running]
  • Engine speed: Above 3, 000 RPM
 BATTERY VOLTAGE (11 - 14 V)
34 (W/L) 40 (O/L) Throttle position sensor 2 (bank 1) Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 Less than 4.75 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 More than 0.36 V
35 (W) 48 (O) Throttle position sensor 2 (bank 2) Input [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 Less than 4.75 V
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 More than 0.36 V
36 (B) - Sensor ground (Manifold absolute pressure sensor) - - -
37 (L) 128(B) Crankshaft position sensor (POS) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 4.0 - 5.0 V(1)
G08255606Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: 2, 000 RPM
 4.0 - 5.0 V(1)
G08255607Courtesy of NISSAN NORTH AMERICA, INC.
38 (W) 96 (B) Manifold absolute pressure (MAP) sensor Input [Engine is running]
  • Warm-up condition
  • Idle speed
 1.2 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 1.5 V
40 (O/L) - Sensor ground
[Throttle position sensor (bank 1)]		 - - -
43 (W/L) 48 (O) Sensor power supply
[Throttle position sensor (bank 2)]		 - [Ignition switch: ON] 5 V
44 (W) 40 (O/L) Sensor power supply
[Throttle position sensor (bank 1)]		 - [Ignition switch: ON] 5 V
45 (LG) 95 (B) Sensor power supply (Battery current sensor) - [Ignition switch: ON] 5 V
46 (R) 128 (B) Sensor power supply
[Crankshaft position sensor (POS)]		 - [Ignition switch: ON] 5 V
47 (B) - Sensor ground
[Crankshaft position sensor (POS)]		 - - -
48 (O) - Sensor ground
[Throttle position sensor (bank 2)]		 - - -
49 (LG) 128 (B) Throttle control motor (Close) (bank 2) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: In the middle of releasing operation
 0 - 14 V(1)
G08255608Courtesy of NISSAN NORTH AMERICA, INC.
50 (V) 128(B) Throttle control motor (Open) (bank 2) Output [Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully depressed
 0 - 14 V(1)
G08255609Courtesy of NISSAN NORTH AMERICA, INC.
[Ignition switch: ON]
  • Engine stopped
  • Selector lever: D
  • Accelerator pedal: Fully released
 0 - 14 V(1)
G08255610Courtesy of NISSAN NORTH AMERICA, INC.
52 (R) 128 (B) Throttle control motor power supply (bank 2) Input [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
53 (G) 128 (B) Ignition switch Input [Ignition switch: OFF] 0 V
[Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
54 (G) - HEV system CAN- L Input/output - -
55 (L) - HEV system CAN- H Input/output - -
57 (L) 128 (B) A/F sensor 1 (bank 1) Input [Ignition switch: ON] 2.2 V
58 (L) 96 (B) Exhaust valve timing control position sensor (bank 1) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 4.0 - 5.0 V(1)
G08255611Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 4.0 - 5.0 V(1)
G08255612Courtesy of NISSAN NORTH AMERICA, INC.
59 (L) 128 (B) Camshaft position sensor (PHASE) (bank 1) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 3.0 - 5.0 V(1)
G08255613Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: 2, 000 RPM
 3.0 - 5.0 V(1)
G08255614Courtesy of NISSAN NORTH AMERICA, INC.
60 (R) 128 (B) Sensor power supply
[Camshaft position sensor (PHASE) (bank 1), Exhaust valve timing control position sensor (bank 1)]		 - [Ignition switch: ON] 5 V
61 (B/W) 128 (B) A/F sensor 1 (bank 1) Input [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 1.8 V
Output voltage varies with air fuel ratio.
62 (O) 92 (G) Exhaust valve timing control position sensor (bank 2) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 4.0 - 5.0 V(1)
G08255615Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 4.0 - 5.0 V(1)
G08255616Courtesy of NISSAN NORTH AMERICA, INC.
63 (R) 128 (B) Camshaft position sensor (PHASE) (bank 2) Input [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 3.0 - 5.0 V(1)
G08255617Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed: 2, 000 RPM
 3.0 - 5.0 V(1)
G08255618Courtesy of NISSAN NORTH AMERICA, INC.
64 (L) 128 (B) Sensor power supply
[Camshaft position sensor (PHASE) (bank 2), Exhaust valve timing control position sensor (bank 2)]		 - [Ignition switch: ON] 5 V
65 (L/O) 128 (B) A/F sensor 1 (bank 2) Input [Ignition switch: ON] 2.2 V
66 (W/L) 128 (B) A/F sensor 1 (bank 2) Input [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 1.8 V
Output voltage varies with air fuel ratio.
67 (Y) 128 (B) Intake air temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with intake air temperature.
68 (G) - Sensor ground
[Mass air flow sensor (bank 1), Intake air temperature sensor]		 - - -
69 (W) 128 (B) Knock sensor (bank 2) Input [Engine is running]
  • Idle speed
 2.5 V(1)
70 (W) 96 (B) Engine oil pressure sensor Input [Engine is running]
  • Warm-up condition
  • Idle speed
 1.3 V(1)
G08255619Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 2.7 V(1)
G08255620Courtesy of NISSAN NORTH AMERICA, INC.
71 (SB) 128 (B) Engine coolant temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with engine coolant temperature.
72 (GR) - Sensor ground (Knock sensor) - - -
73 (B) 128 (B) Knock sensor (bank 1) Input [Engine is running]
  • Idle speed
 2.5 V(1)
74 (L) 128 (B) Sensor power supply (Mass air flow sensor) - [Ignition switch: ON] 5 V
76 (W) 128 (B) Heated oxygen sensor 2 (bank 1) Input [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 at 3, 000 RPM for 1 minute and at idle for 1 minute under no load
 0 - 1.0 V
77 (O) 68 (G) Mass air flow sensor (bank 1) Input [Engine is running]
  • Warm-up condition
  • Idle speed
 0.8 - 1.1 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 500 RPM
 1.4 - 1.7 V
78 (G) 84 (B/W) Engine oil temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with engine oil temperature.
79 (R) 94 (B) Mass air flow sensor (bank 2) Input [Engine is running]
  • Warm-up condition
  • Idle speed
 0.8 - 1.1 V
[Engine is running]
  • Warm-up condition
  • Engine speed: 2, 500 RPM
 1.4 - 1.7 V
80 (L) 128 (B) Heated oxygen sensor 2 (bank 2) Input [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 at 3, 000 RPM for 1 minute and at idle for 1 minute under no load
 0 - 1.0 V
81 (Y) 128 (B) Fuel injector No. 3 Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 BATTERY VOLTAGE (11 - 14 V)(1)
G08255621Courtesy of NISSAN NORTH AMERICA, INC.
82 (V) Fuel injector No. 6
85 (BR) Fuel injector No. 2
86 (R) Fuel injector No. 5 [Engine is running]
  • Warm-up condition
  • Engine speed: 2, 000 RPM
 BATTERY VOLTAGE (11 - 14 V)(1)
G08255622Courtesy of NISSAN NORTH AMERICA, INC.
89 (GR) Fuel injector No. 1
90 (P) Fuel injector No. 4
84 (B/W) - Sensor ground (Heated oxygen sensor 2, Engine coolant temperature sensor, Engine oil temperature sensor) - - -
88 (B) - Sensor ground
[Camshaft position sensor (PHASE)]		 - - -
91 (L) 95 (B) Battery current sensor Input [Engine is running]
  • 12V battery: Fully charged(2)
  • Idle speed
 2.6 - 3.5 V
92 (G) - Sensor ground
[Exhaust valve timing control position sensor (bank 2)]		 - - -
93 (W) 128 (B) Power supply for ECM (Back-up) Input [Ignition switch: OFF] BATTERY VOLTAGE (11 - 14 V)
94 (B) - Sensor ground
[Mass air flow sensor (bank 2)]		 - - -
95 (B) - Sensor ground (Battery current sensor) - - -
96 (B) - Sensor ground
[Exhaust valve timing control position sensor (bank 1), Engine oil pressure sensor]		 - - -
102 (P) 11 2 (V) EVAP control system pressure sensor Input [Ignition switch: ON] 1.8 - 4.8 V
105 (LG) 11 2 (V) Refrigerant pressure sensor Input [Engine is running]
  • Warm-up condition
  • Both A/C switch and blower fan motor switch: ON (Compressor operates)
 1.0 - 4.0 V
106 (P) 128 (B) Fuel tank temperature sensor Input [Engine is running] 0 - 4.8 V
Output voltage varies with fuel tank temperature.
107 (BG) 11 2 (V) Sensor power supply (EVAP control system pressure sensor, Refrigerant pressure sensor) - [Ignition switch: ON] 5 V
110 (V) 128 (B) Engine speed output signal Output [Engine is running]
  • Warm-up condition
  • Idle speed
    NOTE: The pulse cycle changes depending on RPM at idle
 1 V(1)
G08255623Courtesy of NISSAN NORTH AMERICA, INC.
[Engine is running]
  • Engine speed is 2, 000 RPM
 1 V(1)
G08255624Courtesy of NISSAN NORTH AMERICA, INC.
111 (Y) 128 (B) Sensor power supply (Manifold absolute pressure sensor, Engine oil pressure sensor) - [Ignition switch: ON] 5 V
112 (V) - Sensor ground (EVAP control system pressure sensor, Refrigerant pressure sensor) - - -
113 (P) - CAN communication line Input/Output - -
114 (L) - CAN communication line Input/Output - -
117 (V) 128 (B) Data link connector Input/Output - -
121 (LG) 128 (B) EVAP canister vent control valve Output [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
122 (P) 128 (B) Stop lamp switch Input [Ignition switch: OFF]
  • Brake pedal: Fully released
 0 V
[Ignition switch: OFF]
  • Brake pedal: Slightly depressed
 BATTERY VOLTAGE (11 - 14 V)
123 (B)
124 (B)		 - ECM ground - - -
125 (SB) 128 (B) Power supply for ECM Input [Ignition switch: ON] BATTERY VOLTAGE (11 - 14 V)
126 (BR) 128 (B) Brake switch Input [Ignition switch: ON]
  • Brake pedal: Slightly depressed
 0 V
[Ignition switch: ON]
  • Brake pedal: Fully released
 BATTERY VOLTAGE (11 - 14 V)
127 (B)
128 (B)		 - ECM ground - - -
(1) Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
(2) This may vary depending on internal resistance of the tester.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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