Nissan Pathfinder (2012 year). Instruction — part 294
ECM
EC-433
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
ECM Harness Connector Terminal Layout
INFOID:0000000007358388
ECM Terminal and Reference Value
INFOID:0000000007358389
PREPARATION
ECM located in the engine room passenger side behind reservoir
tank.
ECM INSPECTION TABLE
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 dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
EVAP DIAG READY
• Ignition switch: ON
Indicates the ready condition of
EVAP leak diagnosis.
HO2 S2 DIAG1 (B1)
DTC P0139 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0139 self-diagnosis (delayed response) is complete.
CMPLT
HO2 S2 DIAG1 (B2)
DTC P0159 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0159 self-diagnosis (delayed response) is complete.
CMPLT
HO2 S2 DIAG2 (B1)
DTC P0139 self-diagnosis (slow response) is incomplete.
INCMP
DTC P0139 self-diagnosis (slow response) is complete.
CMPLT
HO2 S2 DIAG2 (B2)
DTC P0159 self-diagnosis (slow response) is incomplete.
INCMP
DTC P0159 self-diagnosis (slow response) is complete.
CMPLT
THRTL STK CNT B1
NOTE:
The item is indicated, but not used.
—
MONITOR ITEM
CONDITION
SPECIFICATION
MBIB0045E
BBIA0537E
August 2012
2012 Pathfinder
EC-434
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
ECM
TER-
MI-
NAL
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 en-
gine)
Approximately 2.9 - 8.8V
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
5
L/B
Throttle control motor (Open)
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully depressed
0 - 14V
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 so-
lenoid 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
PBIA8148J
PBIB1104E
PBIB1105E
PBIB1790E
August 2012
2012 Pathfinder
ECM
EC-435
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
C
D
E
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EC
N
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11
LG
Intake valve timing control so-
lenoid 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
12
P
Power steering pressure sen-
sor
[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
[Engine is running]
• Engine speed: 2,000 rpm
Approximately 10V
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
[Engine is running]
• Engine speed: 2,000 rpm
1.0 - 4.0V
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.
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB1790E
PBIB1041E
PBIB1042E
PBIB1039E
PBIB1040E
August 2012
2012 Pathfinder
EC-436
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
ECM
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)
[Engine is running]
•
Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
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 en-
gine)
Approximately 2.9 - 8.8V
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 pres-
sure sensor
[Ignition switch: ON]
Approximately 1.8 - 4.8V
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC984C
SEC985C
PBIA8148J
August 2012
2012 Pathfinder
ECM
EC-437
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
C
D
E
F
G
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EC
N
P
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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
[Engine is running]
• Engine speed: 2,000 rpm
1.0 - 4.0V
34
BR
Intake air temperature sensor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
35
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.
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)
[Engine is running]
•
Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB1039E
PBIB1040E
SEC984C
SEC985C
August 2012
2012 Pathfinder
EC-438
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
ECM
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)
[Engine is running]
• Engine speed: About 2,000 rpm (More than
100 seconds after starting engine)
BATTERY VOLTAGE
(11 - 14V)
47
L
Sensor power supply (Throt-
tle position sensor)
[Ignition switch: ON]
Approximately 5V
48
SB
Sensor power supply
(EVAP control system pres-
sure 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
W/L
A/F sensor 1 (Bank 1)
[Ignition switch: ON]
Approximately 2.2V
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC990C
SEC991C
August 2012
2012 Pathfinder
ECM
EC-439
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
C
D
E
F
G
H
I
J
K
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M
A
EC
N
P
O
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
[Engine is running]
•
Warm-up condition
• Engine speed: 2,500 rpm
0.1 - 0.4V
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*
• 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
B/R
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
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC986C
SEC987C
August 2012
2012 Pathfinder
EC-440
< ECU DIAGNOSIS INFORMATION >
[VQ40DE]
ECM
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
[Engine is running]
•
Warm-up condition
• Engine speed: 2,500 rpm
0.1 - 0.4V
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 or GST: disconnected
Approximately 5V - Battery volt-
age (11 - 14V)
86
P
CAN communication line
—
—
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
—
—
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)
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC986C
SEC987C
August 2012
2012 Pathfinder
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