Nissan Titan A60. Instruction — part 395
EC-246
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[VK56DE]
P0222, P0223 APP SENSOR
>> INSPECTION END
Component Inspection
INFOID:0000000006158674
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform
EC-119, "Throttle Valve Closed Position Learning"
3. Turn ignition switch ON.
4. Set selector lever to D position.
5. Check voltage between ECM terminals 50 (TP sensor 1 signal),
69 (TP sensor 2 signal) and ground under the following condi-
tions.
6. If NG, replace electric throttle control actuator and go to the next
step.
7. Perform
EC-119, "Throttle Valve Closed Position Learning"
8. Perform
EC-120, "Idle Air Volume Learning"
.
Terminal
Accelerator pedal
Voltage
50
(Throttle position sensor 1)
Fully released
More than 0.36V
Fully depressed
Less than 4.75V
69
(Throttle position sensor 2)
Fully released
Less than 4.75V
Fully depressed
More than 0.36V
PBIB1530E
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-247
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P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MIS-
FIRE
On Board Diagnosis Logic
INFOID:0000000006158675
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage)
On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration)
For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation Procedure
INFOID:0000000006158676
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driv-
ing.
1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-
ducting the next step.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
Sensor
Input signal to ECM
ECM function
Crankshaft position sensor (POS)
Engine speed
On board diagnosis of misfire
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0300
0300
Multiple cylinder misfire
detected
Multiple cylinder misfire.
• Improper spark plug
• Insufficient compression
• Incorrect fuel pressure
• The fuel injector circuit is open or shorted
• Fuel injector
• Intake air leak
• The ignition signal circuit is open or short-
ed
• Lack of fuel
• Signal plate
• Air fuel ratio (A/F) sensor 1
• Incorrect PCV hose connection
P0301
0301
No.1 cylinder misfire de-
tected
No. 1 cylinder misfires.
P0302
0302
No. 2 cylinder misfire
detected
No. 2 cylinder misfires.
P0303
0303
No. 3 cylinder misfire
detected
No. 3 cylinder misfires.
P0304
0304
No. 4 cylinder misfire
detected
No. 4 cylinder misfires.
P0305
0305
No. 5 cylinder misfire
detected
No. 5 cylinder misfires.
P0306
0306
No. 6 cylinder misfire
detected
No. 6 cylinder misfires.
P0307
0307
No. 7 cylinder misfire
detected
No. 7 cylinder misfires.
P0308
0308
No. 8 cylinder misfire
detected
No. 8 cylinder misfires.
EC-248
< DTC/CIRCUIT DIAGNOSIS >
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P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
c.
Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and warm it up to normal operating temperature.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Restart engine and let it idle for about 15 minutes.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to
NOTE:
If 1st trip DTC is not detected during above procedure, performing the following procedure is advised.
a. Turn ignition switch OFF and wait at least 10 seconds.
b. Start engine and drive the vehicle under the similar conditions to (1st trip) Freeze Frame Data for a certain
time. Refer to the table below.
Hold the accelerator pedal as steady as possible.
The similar conditions to (1st trip) Freeze Frame Data means the vehicle operation that the following con-
ditions should be satisfied at the same time.
The time to driving varies according to the engine speed in the freeze frame data.
Diagnosis Procedure
INFOID:0000000006158677
1.
CHECK FOR INTAKE AIR LEAK AND PCV HOSE
1. Start engine and run it at idle speed.
2. Listen for the sound of the intake air leak.
3. Check PCV hose connection.
OK or NG
OK
>> GO TO 2.
NG
>> Discover air leak location and repair.
2.
CHECK FOR EXHAUST SYSTEM CLOGGING
Stop engine and visually check exhaust tube, three way catalyst and muffler for dents.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace it.
3.
PERFORM POWER BALANCE TEST
With CONSULT-III
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT-III
Engine speed
Engine speed in the freeze frame data
± 400 rpm
Vehicle speed
Vehicle speed in the freeze frame data
± 10 km/h (6 MPH)
Engine coolant temperature (T)
condition
When the freeze frame data shows lower than 70
°C (158 °F),
T should be lower than 70
°C (158 °F).
When the freeze frame data shows higher than or equal to 70
°C (158 °F),
T should be higher than or equal to 70
°C (158 °F).
Engine speed
Time
Around 1,000 rpm
Approximately 10 minutes
Around 2,000 rpm
Approximately 5 minutes
More than 3,000 rpm
Approximately 3.5 minutes
P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-249
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When disconnecting each fuel injector harness connector one at a time, is there any cylinder which does not
produce a momentary engine speed drop?
Yes or No
Yes
>> GO TO 4.
No
>> GO TO 7.
4.
CHECK FUEL INJECTOR
Does each fuel injector make an operating sound at idle?
Yes or No
Yes
>> GO TO 5.
No
>> Check fuel injector(s) and circuit(s). Refer to
.
5.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1. Turn ignition switch OFF.
2. Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT-III to release fuel pressure, or fuel pres-
sure applies again during the following procedure.
3. Start engine.
4. After engine stalls, crank it two or three times to release all fuel
pressure.
5. Turn ignition switch OFF.
6. Remove all ignition coil harness connectors to avoid the electri-
cal discharge from the ignition coils.
7. Remove ignition coil and spark plug of the cylinder to be
checked.
8. Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9. Connect spark plug and harness connector to ignition coil.
10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm
between the edge of the spark plug and grounded metal portion
as shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is
generated between the spark plug and the grounded metal por-
tion.
CAUTION:
BBIA0374E
PBIB1986E
Spark should be generated.
BBIA0380E
PBIB2325E
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