Nissan Pathfinder (2009 year). Instruction — part 359
EC-886
< COMPONENT DIAGNOSIS >
[VK56DE]
REFRIGERANT PRESSURE SENSOR
6.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
2.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 8.
8.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E5, F14
• Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9.
CHECK INTERMITTENT INCIDENT
GI-49, "Intermittent Incident"
OK or NG
OK
>> Replace refrigerant pressure sensor.
NG
>> Repair or replace malfunctioning part.
Continuity should exist.
2009 Pathfinder
ECM
EC-887
< ECU DIAGNOSIS >
[VK56DE]
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ECU DIAGNOSIS
ECM
CONSULT-III Reference Value in Data Monitor Mode
INFOID:0000000003936867
Remarks:
z
Specification data are reference values.
z
Specification data are output/input values which are detected or supplied by the ECM at the connector.
* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show
the specification data in spite of the ignition timing not being adjusted to the specification data. This IGN TIM-
ING monitors the data calculated by the ECM according to the signals input from the camshaft position sensor
and other ignition timing related sensors.
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED
• Run engine and compare CONSULT-III value with the tachometer indication.
Almost the same speed as the
tachometer indication.
MAS A/F SE-B1
B/FUEL SCHDL
A/F ALPHA-B1
A/F ALPHA-B2
COOLAN TEMP/S
• Engine: After warming up
More than 70
°
C (158
°
F)
A/F SEN1 (B1)
A/F SEN1 (B2)
• Engine: After warming up
Maintaining engine speed at 2,000
rpm
Fluctuates around 2.2 V
HO2S2 (B1)
HO2S2 (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
• After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and
at idle for 1 minute under no load
0 - 0.3 V
←→
Approx. 0.6 - 1.0
V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
• Revving engine from idle to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle
for 1 minute under no load
LEAN
←→
RICH
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer
indication.
Almost the same speed as the
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14 V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.65 - 1.87 V
Accelerator pedal: Fully depressed
More than 4.3 V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.56 - 0.96 V
Accelerator pedal: Fully depressed
More than 4.0 V
TP SEN 1-B1
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8 V
START SIGNAL
• Ignition switch: ON
→
START
→
ON
OFF
→
ON
→
OFF
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
ON
Accelerator pedal: Slightly depressed
OFF
AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor: Operates.)
ON
P/N POSI SW
• Ignition switch: ON
Selector lever: P or N position
ON
Selector lever: Except above position
OFF
2009 Pathfinder
EC-888
< ECU DIAGNOSIS >
[VK56DE]
ECM
PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
(Forward direction)
OFF
Steering wheel: Being turned
ON
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 control switch: OFF
OFF
Heater fan control switch: ON
ON
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
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
2.0 - 2.8 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
10
°
- 20
°
BTDC
2,000 rpm
25
°
- 45
°
BTDC
CAL/LD VALUE
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
14% - 33%
2,500 rpm
12% - 25%
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
3.0 - 9.0 g·m/s
2,500 rpm
9.0 - 28.0 g·m/s
PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal: Not depressed
even slightly, after engine starting.)
0%
2,000 rpm
—
INT/V TIM (B1)
INT/V TIM (B2)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
−
5
°
- 5
°
CA
2,000 rpm
Approx. 0
°
- 20
°
CA
INT/V SOL (B1)
INT/V SOL (B2)
• Engine: After warming up
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 25% - 50%
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
MONITOR ITEM
CONDITION
SPECIFICATION
2009 Pathfinder
ECM
EC-889
< ECU DIAGNOSIS >
[VK56DE]
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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 100
°
C (212
°
F)
LOW
Engine coolant temperature: 101
°
C
(214
°
F) or more
HI
HO2S2 HTR (B1)
HO2S2 HTR (B2)
• 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
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
tachometer indication
VEHICLE SPEED
• Turn drive wheels and compare CONSULT-III value with the speedometer
indication.
Almost the same speed as the
speedometer indication
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has illu-
minated.
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 and blower fan switch: ON (Compressor operates.)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare CONSULT-III value with the speedometer
indication.
Almost the same speed as the
speedometer indication
SET VHCL SPD
• Engine: Running
ASCD: Operating.
The preset vehicle speed is
displayed.
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
• Vehicle speed: Between 40 km/h
(25 MPH) and 144 km/h (89 MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
• Engine: Idle
0 - 80%
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Selector lever: P or N position
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
MONITOR ITEM
CONDITION
SPECIFICATION
2009 Pathfinder
EC-890
< ECU DIAGNOSIS >
[VK56DE]
ECM
*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 the battery is fully charged. Refer to
ECM Harness Connector Terminal Layout
INFOID:0000000003936868
ECM Terminal and Reference Value
INFOID:0000000003936869
PREPARATION
ECM is located in the engine room passenger side behind battery.
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.
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
PBIB3368E
BBIA0386E
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
2
G
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 - 8.8 V
3
V
Throttle control motor power sup-
ply
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14 V)
PBIA8148J
2009 Pathfinder
ECM
EC-891
< ECU DIAGNOSIS >
[VK56DE]
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4
L/W
Throttle control motor (Close)
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully released
0 - 14 V
5
L/B
Throttle control motor (Open)
[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D position
• Accelerator pedal: Fully depressed
0 - 14 V
6
R
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 - 1.0 V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14 V)
10
W
Intake valve timing control sole-
noid valve (bank 1)
[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
11
LG
Intake valve timing control sole-
noid valve (bank 2)
[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
12
P
Power steering pressure sensor
[Engine is running]
• Steering wheel: Being turned
0.5 - 4.5 V
[Engine is running]
• Steering wheel: Not being turned
0.4 - 0.8 V
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB1104E
PBIB1105E
PBIB1790E
PBIB1790E
2009 Pathfinder
EC-892
< ECU DIAGNOSIS >
[VK56DE]
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 10 V
[Engine is running]
• Engine speed: 2,000 rpm
Approximately 10 V
14
SB
Camshaft position sensor
(PHASE)
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle
1.0 - 4.0 V
[Engine is running]
• Engine speed: 2,000 rpm
1.0 - 4.0 V
15
W
Knock sensor (bank 1)
[Engine is running]
• Idle speed
Approximately 2.5 V
16
L
A/F sensor 1 (bank 2)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
Approximately 1.8 V
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-893
< ECU DIAGNOSIS >
[VK56DE]
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21
22
23
44
L
V
G
L
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 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14 V)
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
engine)
Approximately 2.9 - 8.8 V
25
P
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 - 1.0 V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14 V)
32
W
EVAP control system pressure
sensor
[Ignition switch: ON]
Approximately 1.8 - 4.8 V
34
BR
Intake air temperature sensor
[Engine is running]
Approximately 0 - 4.8 V
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 1.8 V
Output voltage varies with air fuel
ratio.
36
W
Knock sensor (bank 2)
[Engine is running]
• Idle speed
Approximately 2.5 V
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
SEC984C
SEC985C
PBIA8148J
2009 Pathfinder
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