Nissan Pathfinder (2009 year). Instruction — part 301
EC-422
< ECU DIAGNOSIS >
[VQ40DE]
ECM
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch is ON
and/or lighting switch is in 2nd
ON
Rear window defogger switch is OFF
and lighting switch is OFF
OFF
IGNITION SW
• Ignition switch: ON
→
OFF
→
ON
ON
→
OFF
→
ON
HEATER FAN SW
• Engine: After warming up, idle the
engine
Heater fan: Operating.
ON
Heater fan: Not operating
OFF
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
INJ PULSE-B2
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
13
°
- 18
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
CAL/LD VALUE
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
5% - 35%
2,500 rpm
5% - 35%
MASS AIRFLOW
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 6.0 g·m/s
2,500 rpm
7.0 - 20.0 g·m/s
PURG VOL C/V
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)
0%
2,000 rpm
—
INT/V TIM (B1)
INT/V TIM (B2)
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 30
°
CA
INT/V SOL (B1)
INT/V SOL (B2)
• Engine: After warming up
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 50%
VIAS S/V-1
• Engine: After warming up
2,200 - 3,300 rpm
ON
Except above conditions
OFF
AIR COND RLY
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
FUEL PUMP RLY
• For 1 second after turning ignition switch ON
• Engine running or cranking
ON
• Except above conditions
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
COOLING FAN
• Engine: After warming up, idle the
engine
• Air conditioner switch: OFF
Engine coolant temperature: 97
°
C
(207
°
F) or less
OFF
Engine coolant temperature: Between
98
°
C (208
°
F) and 104
°
C (219
°
F)
LOW
Engine coolant temperature: 105
°
C
(221
°
F) or more
HI
MONITOR ITEM
CONDITION
SPECIFICATION
2009 Pathfinder
ECM
EC-423
< ECU DIAGNOSIS >
[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
HO2S2 HTR (B1)
HO2S2 HTR (B2)
• 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
ON
• Engine speed: Above 3,600 rpm
OFF
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as the
speedometer indication
VEHICLE SPEED
• Turn drive wheels and compare the CONSULT-III value with speedometer
indication.
Almost the same speed as the
speedometer indication
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has
turned ON.
0 - 65,535 km
(0 - 40,723 mile)
A/F S1 HTR (B1)
A/F S1 HTR (B2)
• Engine: After warming up, idle the engine
4 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare speedometer indication with the CON-
SULT-III value.
Almost the same speed as the
CONSULT-III value
SET VHCL SPD
• Engine: Running
ASCD: Operating.
The preset vehicle speed is dis-
played.
MAIN SW
• Ignition switch: ON
MAIN switch: Pressed
ON
MAIN switch: Released
OFF
CANCEL SW
• Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
• Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased
OFF
SET SW
• Ignition switch: ON
SET/COAST switch: Pressed
ON
SET/COAST switch: Released
OFF
BRAKE SW1
• Ignition switch: ON
Brake pedal: Fully released
ON
Brake pedal: Slightly depressed
OFF
BRAKE SW2
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
CRUISE LAMP
• Ignition switch: ON
MAIN switch: pressed at the 1st time
→
at the 2nd time
ON
→
OFF
SET LAMP
• MAIN switch: ON
• When vehicle speed is between
40km/h (25MPH) and 144km/h
(89MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
• Engine: Idle
0 - 80%
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
2009 Pathfinder
EC-424
< ECU DIAGNOSIS >
[VQ40DE]
ECM
ECM Harness Connector Terminal Layout
INFOID:0000000004297657
ECM Terminal and Reference Value
INFOID:0000000004297658
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-III.
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.
MBIB0045E
BBIA0537E
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
PBIA8148J
PBIB1104E
2009 Pathfinder
ECM
EC-425
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
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
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB1105E
PBIB1790E
PBIB1790E
2009 Pathfinder
EC-426
< ECU DIAGNOSIS >
[VQ40DE]
ECM
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)
PBIB1041E
PBIB1042E
PBIB1039E
PBIB1040E
2009 Pathfinder
ECM
EC-427
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
2009 Pathfinder
EC-428
< ECU DIAGNOSIS >
[VQ40DE]
ECM
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
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
2009 Pathfinder
ECM
EC-429
< ECU DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
LG
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
2009 Pathfinder
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