Nissan Pathfinder (2008 year). Manual — part 261
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-205
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
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J
K
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M
A
EC
N
P
O
2.
Disconnect spark plug and connect a known-good spark plug.
3.
Crank engine for about three seconds, and recheck whether spark is generated between the spark plug
and the grounded metal portion.
OK or NG
OK
>> GO TO 9.
NG
>> Check ignition coil, power transistor and their circuits. Refer to
9.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc.
OK or NG
OK
>> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to
.
NG
>> 1.
Repair or clean spark plug.
2.
GO TO 10.
10.
CHECK FUNCTION OF IGNITION COIL-III
1.
Reconnect the initial spark plugs.
2.
Crank engine for about three seconds, and recheck whether spark is generated between the spark plug
and the grounded portion.
OK or NG
OK
>> INSPECTION END
NG
>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to
.
11.
CHECK COMPRESSION PRESSURE
Check compression pressure. Refer to
.
OK or NG
OK
>> GO TO 12.
NG
>> Check pistons, piston rings, valves, valve seats and cylinder head gaskets.
12.
CHECK FUEL PRESSURE
1.
Install all removed parts.
2.
Release fuel pressure to zero. Refer to
3.
Install fuel pressure gauge and check fuel pressure. Refer to
OK or NG
OK
>> GO TO 14.
NG
>> GO TO 13.
13.
DETECT MALFUNCTIONING PART
Check the following.
• Fuel pump and circuit (Refer to
.)
• Fuel pressure regulator (Refer to
• Fuel lines
• Fuel filter for clogging
>> Repair or replace.
Spark should be generated.
SEF156I
Spark should be generated.
At idle: Approx. 350 kPa (3.57 kg/cm
2
, 51 psi)
EC-206
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
14.
CHECK IGNITION TIMING
Check the following items. Refer to
OK or NG
OK
>> GO TO 15.
NG
>> Follow the
15.
CHECK A/F SENSOR 1 INPUT SIGNAL
1.
Turn ignition switch OFF.
2.
Disconnect A/F sensor 1 harness connector.
3.
Disconnect ECM harness connector.
4.
Check harness continuity between A/F sensor 1 terminal and ECM terminal as follows.
Refer to Wiring Diagram.
5.
Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.
6.
Also check harness for short to power.
OK or NG
OK
>> GO TO 16.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors between ECM
and A/F sensor 1.
16.
CHECK A/F SENSOR 1 HEATER
EC-104, "Component Inspection"
OK or NG
Items
Specifications
Target idle speed
625
±
50 rpm (in P or N position)
Ignition timing
15
±
5
°
BTDC (in P or N position)
A/F sensor 1 terminal
ECM terminal
Bank 1
1
35
2
56
Bank 2
1
16
2
75
Continuity should exist.
Bank 1
Bank 2
A/F sensor 1 terminal
ECM terminal
A/F sensor 1 terminal
ECM terminal
1
35
1
16
2
56
2
75
Continuity should not exist.
BBIA0544E
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-207
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
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K
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M
A
EC
N
P
O
OK
>> GO TO 18.
NG
>> GO TO 17.
17.
REPLACE A/F SENSOR 1
Replace malfunctioning A/F sensor 1.
CAUTION:
• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a
hard surface such as a concrete floor; use a new one.
• Before installing new A/F sensor, clean exhaust system threads using Heated Oxygen Sensor
Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
>> INSPECTION END
18.
CHECK MASS AIR FLOW SENSOR
With CONSULT-III
Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-III.
With GST
Check mass air flow sensor signal in Service $01 with GST.
OK or NG
OK
>> GO TO 19.
NG
>> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to
EC-112, "Component Description"
.
19.
CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in
EC-470, "Symptom Matrix Chart"
.
OK or NG
OK
>> GO TO 20.
NG
>> Repair or replace.
20.
ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to
>> GO TO 21.
21.
CHECK INTERMITTENT INCIDENT
.
>> INSPECTION END
2.0 - 6.0 g·m/sec:
at idling
7.0 - 20.0 g·m/sec:
at 2,500 rpm
2.0 - 6.0 g·m/sec:
at idling
7.0 - 20.0 g·m/sec:
at 2,500 rpm
EC-208
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0327, P0328, P0332, P0333 KS
P0327, P0328, P0332, P0333 KS
Component Description
INFOID:0000000001375993
The knock sensor is attached to the cylinder block. It senses engine
knocking using a piezoelectric element. A knocking vibration from
the cylinder block is sensed as vibrational pressure. This pressure is
converted into a voltage signal and sent to the ECM.
On Board Diagnosis Logic
INFOID:0000000001375994
The MIL will not light up for these diagnoses.
DTC Confirmation Procedure
INFOID:0000000001375995
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 10V at idle.
4.
Start engine and run it for at least 5 seconds at idle speed.
5.
Check 1st trip DTC.
6.
If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000001375997
1.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-I
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check resistance between ECM terminals 15, 36 and ground. Refer to Wiring Diagram.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 M
Ω
.
BBIA0547E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0327
0327
(Bank 1)
Knock sensor circuit low in-
put
An excessively low voltage from the sensor
is sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Knock sensor
P0332
0332
(Bank 2)
P0328
0328
(Bank 1)
Knock sensor circuit high in-
put
An excessively high voltage from the sensor
is sent to ECM.
P0333
0333
(Bank 2)
Resistance: Approximately 532 - 588 k
Ω
[at 20
°
C (68
°
F)]
P0327, P0328, P0332, P0333 KS
EC-209
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 2.
2.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1.
Disconnect knock sensor harness connector.
2.
Check harness continuity between ECM terminal 15 and knock
sensor (bank1) terminal 1, ECM terminal 36 and knock sensor
(bank 2) terminal 1.
Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F67, F150
• Harness for open or short between ECM and knock sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK KNOCK SENSOR
EC-210, "Component Inspection"
OK or NG
OK
>> GO TO 5.
NG
>> Replace knock sensor.
5.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body.
Refer to
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace ground connections.
6.
CHECK KNOCK SENSOR SHIELD CIRCUIT FOR OPEN AND SHORT
1.
Disconnect knock sensor harness connector.
2.
Check harness continuity between knock sensor terminal 2 and ground. Refer to Wiring Diagram.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
Continuity should exist.
BBIA0547E
BBIA0539E
Continuity should exist.
EC-210
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0327, P0328, P0332, P0333 KS
7.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F67, F150
• Harness connectors F14, E5
• Harness for open or short between knock sensor and ground
>> Repair open circuit or short power in harness or connectors.
8.
CHECK INTERMITTENT INCIDENT
.
>> INSPECTION END
Component Inspection
INFOID:0000000001375998
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE:
It is necessary to use an ohmmeter which can measure more
than 10 M
Ω
.
CAUTION:
Do not use any knock sensors that have been dropped or phys-
ically damaged. Use only new ones.
Resistance: Approximately 532 - 588 k
Ω
[at 20
°
C (68
°
F)]
SEF111Y
P0335 CKP SENSOR (POS)
EC-211
< COMPONENT DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
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K
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M
A
EC
N
P
O
P0335 CKP SENSOR (POS)
Component Description
INFOID:0000000001375999
The crankshaft position sensor (POS) is located on the oil pan facing
the gear teeth (cogs) of the signal plate. It detects the fluctuation of
the engine revolution.
The sensor consists of a permanent magnet and Hall IC.
When the engine is running, the high and low parts of the teeth
cause the gap with the sensor to change.
The changing gap causes the magnetic field near the sensor to
change.
Due to the changing magnetic field, the voltage from the sensor
changes.
The ECM receives the voltage signal and detects the fluctuation of
the engine revolution.
ECM receives the signals as shown in the figure.
On Board Diagnosis Logic
INFOID:0000000001376001
DTC Confirmation Procedure
INFOID:0000000001376002
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 10.5V with igni-
tion switch ON.
1.
Crank engine for at least 2 seconds and run it for at least 5 seconds at idle speed.
2.
Check 1st trip DTC.
3.
If 1st trip DTC is detected, go to
Diagnosis Procedure
INFOID:0000000001376004
1.
CHECK GROUND CONNECTIONS
PBIB0562E
PBIB2744E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0335
0335
Crankshaft position sen-
sor (POS) circuit
• The crankshaft position sensor (POS) signal
is not detected by the ECM during the first
few seconds of engine cranking.
• The proper pulse signal from the crankshaft
position sensor (POS) is not sent to ECM
while the engine is running.
• The crankshaft position sensor (POS) signal
is not in the normal pattern during engine run-
ning.
• Harness or connectors
(The sensor circuit is open or shorted)
• Crankshaft position sensor (POS)
• Signal plate
EC-212
< COMPONENT DIAGNOSIS >
[VQ40DE]
P0335 CKP SENSOR (POS)
1.
Turn ignition switch OFF.
2.
Loosen and retighten three ground screws on the body. Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
2.
CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY CIRCUIT
1.
Disconnect crankshaft position (CKP) sensor (POS) harness
connector.
2.
Turn ignition switch ON.
3.
Check voltage between CKP sensor (POS) terminal 1 and
ground with CONSULT-III or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F32, E2
• Harness for open or short between crankshaft position sensor (POS) and ECM
• Harness for open or short between crankshaft position sensor (POS) and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK CKP SENSOR (POS) GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Check harness continuity between CKP sensor (POS) terminal 3 and ground. Refer to Wiring Diagram.
3.
Also check harness for short to power.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 5.
BBIA0539E
BBIA0548E
Voltage: Battery voltage
PBIB0664E
Continuity should exist.
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