Nissan Frontier. Instruction — part 419
P0222, P0223 TP SENSOR
EC-247
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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EC
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OK or NG
OK
>> GO TO 5.
NG
>> Repair short to ground or short to power in harness or connectors.
5.
CHECK APP SENSOR
EC-424, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 6.
6.
REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly. Refer to
2. Perform
EC-123, "Accelerator Pedal Released Position Learning"
.
3. Perform
EC-123, "Throttle Valve Closed Position Learning"
4. Perform
EC-124, "Idle Air Volume Learning"
.
>> INSPECTION END
7.
CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 36 and electric throttle control actuator terminal 4.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 8.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK THROTTLE POSITION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 37 and electric throttle control actuator terminal 1.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit, short to ground or short to power in harness or connectors.
9.
CHECK THROTTLE POSITION SENSOR
EC-248, "Component Inspection"
OK or NG
OK
>> GO TO 11.
NG
>> GO TO 10.
10.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator. Refer to
2. Perform
EC-123, "Throttle Valve Closed Position Learning"
3. Perform
EC-124, "Idle Air Volume Learning"
.
>> INSPECTION END
11.
CHECK INTERMITTENT INCIDENT
GI-42, "Intermittent Incident"
.
Continuity should exist.
Continuity should exist.
EC-248
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0222, P0223 TP SENSOR
>> INSPECTION END
Component Inspection
INFOID:0000000009480907
THROTTLE POSITION SENSOR
1. Reconnect all harness connectors disconnected.
2. Perform
EC-123, "Throttle Valve Closed Position Learning"
3. Turn ignition switch ON.
4. Set shift lever to D (A/T) or 1st (M/T) position.
5. Check voltage between ECM terminals 37 (TP sensor 1 signal), 38 (TP sensor 2 signal) and ground under
the following conditions.
6. If NG, replace electric throttle control actuator and go to the next step. Refer to
7. Perform
EC-123, "Throttle Valve Closed Position Learning"
8. Perform
EC-124, "Idle Air Volume Learning"
.
Terminal
Accelerator pedal
Voltage
37
(Throttle position sensor 1)
Fully released
More than 0.36V
Fully depressed
Less than 4.75V
38
(Throttle position sensor 2)
Fully released
Less than 4.75V
Fully depressed
More than 0.36V
P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-249
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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P0300, P0301, P0302, P0303, P0304 MISFIRE
On Board Diagnosis Logic
INFOID:0000000009480908
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 first 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 (POS) signal every 200 engine revo-
lutions 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 in any one cylinder or in multiple cylinders.
DTC Confirmation Procedure
INFOID:0000000009480909
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driv-
ing.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Restart engine and let it idle for about 15 minutes.
4. Check 1st trip DTC.
5. 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.
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 misfires 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 shorted
• Lack of fuel
• Drive plate or flywheel
• Air fuel ratio (A/F) sensor 1
• Incorrect PCV hose connection
P0301
0301
No.1 cylinder misfire detected
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.
EC-250
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0300, P0301, P0302, P0303, P0304 MISFIRE
b. Start engine and drive the vehicle under 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.
Similar conditions to (1st trip) Freeze Frame Data mean that the following conditions should be satisfied at
the same time.
Driving time varies according to the engine speed in the freeze frame data.
WITH GST
Follow the procedure “WITH CONSULT” above.
Diagnosis Procedure
INFOID:0000000009480910
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
1. Perform “POWER BALANCE” in “ACTIVE TEST” mode.
2. Is there any cylinder which does not produce a momentary engine speed drop?
Without CONSULT
Engine speed
Engine speed in the freeze frame data
± 400 rpm
Vehicle speed
Vehicle speed in the feaze 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
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