DTC P0301:00, P0302:00, P0303:00, P0304:00 [MZR 2.0 DISI i-stop]

id0102d4703300

DTC P0301:00

Cylinder No.1 misfire detected

DTC P0302:00

Cylinder No.2 misfire detected

DTC P0303:00

Cylinder No.3 misfire detected

DTC P0304:00

Cylinder No.4 misfire detected
DETECTION CONDITION
•  The PCM monitors the CKP sensor input signal interval time. The PCM calculates the change of interval time for each cylinder. If the change of interval time exceeds the preprogrammed criteria, the PCM detects a misfire in the corresponding cylinder. While the engine is running, the PCM counts the number of misfires that occurred at 200 crankshaft revolutions and 1,000 crankshaft revolutions and calculates a misfire ratio for each crankshaft revolution. If the ratio exceeds the preprogrammed criteria, the PCM determines that a misfire, which can damage the catalytic converter or affect emission performance, has occurred.
Diagnostic support note
•  This is a continuous monitor (misfire).
•  The MIL illuminates if the PCM detects a misfire which affects emission performance in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•  The MIL flashes if the PCM detects a misfire which can damage the catalytic converter during the first drive cycle.
•  PENDING CODE is available if the PCM detects a misfire which affects emission performance during the first drive cycle.
•  FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
•  The DTC is stored in the PCM memory.
POSSIBLE CAUSE
•  Erratic signal to PCM
―  APP sensor signal malfunction
―  ECT sensor signal malfunction
―  IAT sensor signal malfunction
―  MAF sensor signal malfunction
―  CKP sensor signal malfunction
―  TP sensor signal malfunction
―  VSS signal malfunction
―  Related connector and terminal malfunction
―  Related wiring harness malfunction
•  Air suction in intake air system (between dynamic chamber and cylinder head)
•  Engine malfunction (Engine coolant leakage to combustion chamber)
•  Fuel injector related wiring harness malfunction
•  Ignition system malfunction
―  Spark plug malfunction
―  Ignition coil malfunction
―  Ignition coil related wiring harness malfunction
•  Inadequate engine compression due to engine internal malfunction
•  Improper operation of fuel injector
•  PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAVE BEEN RECORDED
•  Have the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (misfire related) been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS on the repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
•  Verify related Service Information availability.
•  Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
•  If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND/OR DTC
•  Switch the ignition to off, then to ON (engine off).
•  Perform the Pending Trouble Code Access Procedure and DTC Reading Procedure.
•  Are any other PENDING CODEs and/or DTCs present?
Yes
Go to the applicable PENDING CODE or DTC inspection.
(See DTC TABLE [MZR 2.0 DISI i-stop].)
No
Go to the next step.
4
VERIFY CURRENT INPUT SIGNAL STATUS (KEY TO ON/IDLE)
•  Access the following PIDs using the M-MDS:
―  APP1
―  APP2
―  ECT
―  IAT
―  MAF
―  RPM
―  TP REL
―  VSS
•  Is there any signal that is far out of specification when switch the ignition to ON and the engine idles?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
5
VERIFY CURRENT INPUT SIGNAL STATUS UNDER FREEZE FRAME DATA (MODE 2) CONDITION
Caution
•  While performing this step, always operate the vehicle in a safe and lawful manner.
•  When the M-MDS is used to observe monitor system status while driving, be sure to have another technician with you, or record the data in the M-MDS using the PID/DATA MONITOR AND RECORD capturing function and inspect later.
•  Access the same PIDs as Step 4 while the simulating under the FREEZE FRAME DATA (Mode 2) condition.
•  Is there any signal which causes drastic changes?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
6
INSPECT INTAKE AIR SYSTEM FOR AIR SUCTION
•  Inspect for air leakage at the following:
―  Around connection of dynamic chamber and intake manifold
―  Around connection of intake manifold and cylinder head
Note
•  Engine speed may change when rust penetrating agent is sprayed on the air suction area.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
7
INSPECT SEALING OF ENGINE COOLANT PASSAGE
•  Perform the “ENGINE COOLANT LEAKAGE INSPECTION”.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 14.
No
Go to the next step.
8
INSPECT IGNITION SYSTEM OPERATION
•  Perform the Spark Test.
•  Is the strong blue spark visible at each cylinder?
Yes
Go to Step 11.
No
Go to the next step.
9
INSPECT SPARK PLUG
•  Inspect the spark plug for suspected cylinder.
•  Is there any malfunction?
Yes
Replace the suspected spark plug, then go to Step 14.
(See SPARK PLUG REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Go to the next step.
10
INSPECT IGNITION COIL
•  Inspect the ignition coil for suspected cylinder.
•  Is there any malfunction?
Yes
Replace the suspected ignition coil, then go to Step 14.
(See IGNITION COIL REMOVAL/INSTALLATION [MZR 2.0 DISI i-stop].)
No
Inspect the ignition coil related wiring harness condition (intermittent open or short) for all cylinders.
Repair or replace the suspected wiring harness, then go to Step 14.
11
INSPECT ENGINE COMPRESSION
•  Inspect the engine compression.
•  Is there any malfunction?
Yes
Repair or replace the malfunctioning parts according to the inspection results, then go to Step 14.
No
Go to the next step.
12
INSPECT FUEL INJECTOR OPERATION
•  Access the INJ_1, INJ_2, INJ_3, INJ_4 PIDs using the M-MDS.
•  Start the engine and warm it up to the normal operating temperature.
•  Turn the fuel injector off from on using the PID simulation function.
•  Does the engine speed decrease while the fuel injectors are turned off?
Yes
Go to Step 14.
No
Go to the next step.
13
INSPECT FUEL INJECTOR WIRING HARNESS
•  Remove the intake air system parts.
•  Disconnect the fuel injector connector on suspected cylinder.
•  Connect the NOID LIGHT to the fuel injector terminals.
•  Inspect the light dim during cranking.
•  Does the light illuminate?
Yes
Replace the suspected fuel injector, then go to the next step.
No
Inspect the fuel injector wiring harnesses.
Repair or replace the suspected wiring harness if necessary, then go to the next step.
14
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Perform the Drive Mode 03 (A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode).
•  Is the PENDING CODE for this DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
15
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZR 2.0 DISI i-stop].)
No
DTC troubleshooting completed.