Nissan Pathfinder (2009 year). Instruction — part 284
EC-286
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0462, P0463 FUEL LEVEL SENSOR
P0462, P0463 FUEL LEVEL SENSOR
Component Description
INFOID:0000000004297476
The fuel level sensor is mounted in the fuel level sensor unit. The
sensor detects a fuel level in the fuel tank and transmits a signal to
the combination meter. The combination meter sends the fuel level
sensor signal to the ECM through CAN communication line.
It consists of two parts, one is mechanical float and the other is vari-
able resistor. Fuel level sensor output voltage changes depending on
the movement of the fuel mechanical float.
On Board Diagnosis Logic
INFOID:0000000004297477
NOTE:
• If DTC P0462 or P0463 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC
UXXXX.
• If DTC P0462 or P0463 is displayed with DTC P0607, first perform the trouble diagnosis for DTC
P0607. Refer to
DTC Confirmation Procedure
INFOID:0000000004297478
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at ignition
switch ON.
1.
Turn ignition switch ON and wait at least 5 seconds.
2.
Check 1st trip DTC.
3.
If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000004297479
1.
CHECK COMBINATION METER FUNCTION
.
OK or NG
OK
>> GO TO 2.
NG
>> Go to
MWI-32, "Component Function Check"
.
2.
CHECK INTERMITTENT INCIDENT
GI-49, "Intermittent Incident"
BBIA0529E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0462
0462
Fuel level sensor circuit
low input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(The CAN communication line is open or
shorted)
• Harness or connectors
(The sensor circuit is open or shorted)
• Combination meter
• Fuel level sensor
P0463
0463
Fuel level sensor circuit
high input
An excessively high voltage from the sensor is
sent to ECM.
2009 Pathfinder
P0462, P0463 FUEL LEVEL SENSOR
EC-287
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
>> INSPECTION END
2009 Pathfinder
EC-288
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0500 VSS
P0500 VSS
Description
INFOID:0000000004297480
NOTE:
• If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
• If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
.
The vehicle speed signal is sent to the combination meter from the “ABS actuator and electric unit (control
unit)” by CAN communication line. The combination meter then sends a signal to the ECM by CAN communi-
cation line.
On Board Diagnosis Logic
INFOID:0000000004297481
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode.
DTC Confirmation Procedure
INFOID:0000000004297482
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next step.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Steps 1 and 2 may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
WITH CONSULT-III
1.
Start engine (VDC switch OFF).
2.
Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-III. The vehicle speed on CON-
SULT-III should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
If NG, go to
If OK, go to following step.
3.
Select “DATA MONITOR” mode with CONSULT-III.
4.
Warm engine up to normal operating temperature.
5.
Maintain the following conditions for at least 60 consecutive seconds.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0500
0500
Vehicle speed sensor
The almost 0 km/h (0 MPH) signal from
vehicle speed sensor is sent to ECM even
when vehicle is being driven.
• Harness or connectors
(The CAN communication line is open or short-
ed)
• Harness or connectors
(The vehicle speed signal circuit is open or
shorted)
• Wheel sensor
• Combination meter
• ABS actuator and electric unit (control unit)
Detected item
Engine operating condition in fail-safe mode
Vehicle speed sensor
When the fail-safe system for vehicle speed sensor is activated, the cooling fan operates
(High) while engine is running.
ENG SPEED
1,700 - 6,000 rpm
COOLAN TEMP/S
More than 70
°
C (158
°
F)
B/FUEL SCHDL
6.3 - 31.8 msec
2009 Pathfinder
P0500 VSS
EC-289
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
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M
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EC
N
P
O
6.
Check 1st trip DTC.
7.
If 1st trip DTC is detected, go to
Overall Function Check
INFOID:0000000004297483
Use this procedure to check the overall function of the vehicle speed sensor circuit. During this check, a 1st
trip DTC might not be confirmed.
WITH GST
1.
Lift up drive wheels.
2.
Start engine.
3.
Read vehicle speed sensor signal in Service $01 with GST.
The vehicle speed sensor on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.
4.
If NG, go to
Diagnosis Procedure
INFOID:0000000004297484
1.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
or
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK COMBINATION METER FUNCTION
.
>> INSPECTION END
Selector lever
Except P or N position
PW/ST SIGNAL
OFF
2009 Pathfinder
EC-290
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0506 ISC SYSTEM
P0506 ISC SYSTEM
Description
INFOID:0000000004297485
NOTE:
If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis Logic
INFOID:0000000004297486
DTC Confirmation Procedure
INFOID:0000000004297487
NOTE:
• If the target idle speed is out of the specified value, perform,
EC-25, "Idle Air Volume Learning"
,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the
• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
• Before performing the following procedure,confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above
−
10
°
C(14
°
F).
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON.
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Start engine and run it for at least 1 minute at idle speed.
6.
Check 1st trip DTC.
7.
If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000004297488
1.
CHECK INTAKE AIR LEAK
1.
Start engine and let it idle.
2.
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 2.
NG
>> Discover air leak location and repair.
2.
REPLACE ECM
1.
Stop engine.
2.
Replace ECM.
3.
Perform initialization of NVIS (NATS) system and registration of all NVIS (NATS) ignition key IDs. Refer to
SEC-8, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0506
0506
Idle speed control sys-
tem RPM lower than ex-
pected
The idle speed is less than the target idle speed
by 100 rpm or more.
• Electric throttle control actuator
• Intake air leak
2009 Pathfinder
P0506 ISC SYSTEM
EC-291
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
(with Intelligent Key system)
SEC-124, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT :
(without Intelligent Key system).
4.
5.
EC-25, "Accelerator Pedal Released Position Learning"
6.
EC-25, "Throttle Valve Closed Position Learning"
.
7.
EC-25, "Idle Air Volume Learning"
>> INSPECTION END
2009 Pathfinder
EC-292
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0507 ISC SYSTEM
P0507 ISC SYSTEM
Description
INFOID:0000000004297489
NOTE:
If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis Logic
INFOID:0000000004297490
DTC Confirmation Procedure
INFOID:0000000004297491
NOTE:
• If the target idle speed is out of the specified value, perform,
EC-25, "Idle Air Volume Learning"
,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the
• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
• Always perform the test at a temperature above
−
10
°
C(14
°
F).
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON.
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Start engine and run it for at least 1 minute at idle speed.
6.
Check 1st trip DTC.
7.
If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000004297492
1.
CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK INTAKE AIR LEAK
1.
Start engine and let it idle.
2.
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 3.
NG
>> Discover air leak location and repair.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0507
0507
Idle speed control sys-
tem RPM higher than
expected
The idle speed is more than the target idle
speed by 200 rpm or more.
• Electric throttle control actuator
• Intake air leak
• PCV system
2009 Pathfinder
P0507 ISC SYSTEM
EC-293
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3.
REPLACE ECM
1.
Stop engine.
2.
Replace ECM.
3.
Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to
SEC-8, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"
(with Intelligent Key system) or
SEC-124, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT
(without Intelligent Key System).
4.
5.
EC-25, "Accelerator Pedal Released Position Learning"
6.
EC-25, "Throttle Valve Closed Position Learning"
.
7.
EC-25, "Idle Air Volume Learning"
>> INSPECTION END
2009 Pathfinder
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