DTC P3400:00 [PCM (SKYACTIV-G)]
DTC P3400:00 [PCM (SKYACTIV-G)]
SM2334490
id0102t4517000
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Note
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• To determine the malfunctioning part, proceed with the diagnostics from “Function Inspection Using M-MDS”.
Details On DTCs
Description |
Cylinder deactivation system malfunction |
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Detection condition
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Determination conditions
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• A condition continues in which both the intake valve and exhaust valve for No.1 or No.4 cylinder open mistakenly during cylinder deactivation control.
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Preconditions
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• During cylinder deactivation control
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Malfunction determination period
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• 0.5 s period
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Drive cycle
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• 2
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Self test type
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• CMDTC self test
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Sensor used
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• A/F sensor
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Fail-safe function
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• Inhibits the cylinder deactivation control.
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Vehicle status when DTCs are output
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• Not applicable
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Possible cause
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• Switchable HLA malfunction
• OCV for No.1 cylinder deactivation malfunction
• OCV for No.4 cylinder deactivation malfunction
• Intake valve and exhaust valve for No.1 cylinder stuck open malfunction
• Intake valve and exhaust valve for No.4 cylinder stuck open malfunction
• Engine oil solenoid valve malfunction
• Engine oil malfunction
• PCM malfunction
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System Wiring Diagram
Function Explanation (DTC Detection Outline)
Repeatability Verification Procedure
PID Item/Simulation Item Used In Diagnosis
Function Inspection Using M-MDS
Step |
Inspection |
Results |
Action |
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1
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PURPOSE: VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
• Verify related Service Bulletins, on-line repair information, or Service Information availability.
• Is any related Information available?
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Yes
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Perform repair or diagnosis according to the available information.
• If the vehicle is not repaired, go to the next step.
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No
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Go to the next step.
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2
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PURPOSE: RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
• Record the freeze frame data/snapshot data.
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—
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Go to Troubleshooting Diagnostic Procedure to perform the procedure from Step 1.
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Troubleshooting Diagnostic Procedure
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― Verify engine oil level.
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― Verify the OCV for No.1 cylinder deactivation installation condition.
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― Verify the OCV for No.4 cylinder deactivation installation condition.
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― Perform a unit inspection of the switchable HLA.
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― Verify if the intake valve and exhaust valve for the No.1 cylinder are not stuck open.
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― Verify if the intake valve and exhaust valve for the No.4 cylinder are not stuck open.
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― Perform a unit inspection of the engine oil solenoid valve.
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― Perform an engine oil related inspection.
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― Verify that the primary malfunction is resolved and there are no other malfunctions.
Step |
Inspection |
Results |
Action |
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1
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PURPOSE: INSPECT ENGINE OIL LEVEL
• Switch the ignition off.
• Inspect the engine oil level. (See ENGINE OIL LEVEL INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
• Is the engine oil level sufficient?
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Yes
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Go to the next step.
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No
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Add genuine motor oil.
Perform the “ENGINE OIL DATA RESET” and perform the repair completion verification.
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2
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PURPOSE: VERIFY IF OCV FOR No.1 CYLINDER DEACTIVATION IS INSTALLED CORRECTLY
• Verify the OCV for No.1 cylinder deactivation installation condition. (See OIL CONTROL VALVE (OCV) FOR CYLINDER DEACTIVATION INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
• Is the installation condition normal?
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Yes
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Go to the next step.
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No
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Correctly install the OCV for No.1 cylinder deactivation and perform the repair completion verification.
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3
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PURPOSE: VERIFY IF OCV FOR No.4 CYLINDER DEACTIVATION IS INSTALLED CORRECTLY
• Verify the OCV for No.4 cylinder deactivation installation condition. (See OIL CONTROL VALVE (OCV) FOR CYLINDER DEACTIVATION INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
• Is the installation condition normal?
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Yes
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Go to the next step.
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No
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Correctly install the OCV for No.4 cylinder deactivation and perform the repair completion verification.
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4
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PURPOSE: INSPECT SWITCHABLE HLA FOR MALFUNCTION
• Inspect the applicable part. (See HYDRAULIC LASH ADJUSTER (HLA) INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
• Is the part normal?
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Yes
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Go to the next step.
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No
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Clean or replace the malfunctioning location and perform the repair completion verification.
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5
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PURPOSE: INSPECT CONDITION OF INTAKE VALVE AND EXHAUST VALVE FOR No.1 CYLINDER
• Inspect the condition of the intake valve and the exhaust valve for No.1 cylinder.
• Are the intake valve and the exhaust valve for No.1 cylinder stuck?
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Yes
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Clean or replace the stuck valve and perform the repair completion verification.
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No
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Go to the next step.
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6
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PURPOSE: INSPECT CONDITION OF INTAKE VALVE AND EXHAUST VALVE FOR No.4 CYLINDER
• Inspect the condition of the intake valve and the exhaust valve for No.4 cylinder.
• Are the intake valve and the exhaust valve for No.4 cylinder stuck?
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Yes
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Clean or replace the stuck valve and perform the repair completion verification.
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No
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Go to the next step.
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7
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PURPOSE: INSPECT ENGINE OIL SOLENOID VALVE FOR MALFUNCTION
• Inspect the applicable part. (See ENGINE OIL SOLENOID VALVE INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
• Is the part normal?
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Yes
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Go to the next step.
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No
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Repair or replace the malfunctioning location and perform the repair completion verification.
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8
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PURPOSE: INSPECT IF INSUFFICIENT HYDRAULIC PRESSURE CAUSED BY USE OF UNSPECIFIED ENGINE OIL
• Is the specified engine oil being used?
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Yes
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Go to the next step.
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No
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Replace the engine oil with genuine motor oil.
Perform the “ENGINE OIL DATA RESET” and perform the repair completion verification.
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9
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PURPOSE: INSPECT ENGINE OIL PRESSURE
• Inspect the engine oil pressure. (See OIL PRESSURE INSPECTION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
• Is there any malfunction?
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Yes
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Go to the next step.
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No
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Go to repair completion verification.
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10
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PURPOSE: VERIFY IF MALFUNCTION RELATED TO ENGINE OIL LEAK OR RESTRICTION AFFECTS DIAGNOSTIC RESULTS
• Start the engine.
• Verify if there is engine oil leakage in the oil passage or restriction.
• Is there engine oil leakage in the oil passage or restriction?
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Yes
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Repair or replace the malfunctioning location.
Add genuine motor oil.
Perform the “ENGINE OIL DATA RESET” and perform the repair completion verification.
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No
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Go to the next step.
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Repair completion verification 1
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PURPOSE: VERIFY THAT VEHICLE IS REPAIRED
• Install/connect the part removed/disconnected during the troubleshooting procedure.
• Clear the DTC recorded in the memory. (See CLEARING DTC.)
• Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
• Perform the DTC inspection for the PCM. (See DTC INSPECTION.)
• Is the same Pending DTC present?
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Yes
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Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.
If the CAN communication is normal, perform the diagnosis from Step 1.
• If the malfunction recurs, replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G (WITH CYLINDER DEACTIVATION (US))].)
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No
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Go to the next step.
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Repair completion verification 2
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PURPOSE: VERIFY IF OTHER DTCs DISPLAYED
• Perform the DTC inspection. (See DTC INSPECTION.)
• Are any other DTCs displayed?
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Yes
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Repair the malfunctioning location according to the applicable DTC troubleshooting.
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No
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DTC troubleshooting completed.
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