DTC P3400:00 [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))]

id0102s9517000

DTC P3400:00

Cylinder deactivation system malfunction
DETECTION CONDITION
•  A condition continues in which both the intake valve and exhaust valve for No.1 or 4 cylinder open mistakenly during cylinder deactivation control.
Diagnostic support note
•  This is a continuous monitor (CCM).
•  The check engine light illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
•  PENDING CODE is available if the PCM detects the above malfunction condition during first drive cycle.
•  FREEZE FRAME DATA/Snapshot data is available.
•  DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION
•  Inhibits the cylinder deactivation control.
POSSIBLE CAUSE
•  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
―  Use of unspecified engine oil
―  Engine oil leakage
―  Low engine oil pressure
―  Engine oil runners are clogged or have leakage
•  PCM malfunction
SYSTEM WIRING DIAGRAM
•  Not applicable

Diagnostic Procedure

STEP

INSPECTION

ACTION
1
RECORD FREEZE FRAME DATA/SNAPSHOT DATA AND DIAGNOSTIC MONITORING TEST RESULTS TO UTILIZE WITH REPEATABILITY VERIFICATION
Note
•  Recording can be facilitated using the screen capture function of the PC.
•  Record the FREEZE FRAME DATA/snapshot data and DIAGNOSTIC MONITORING TEST RESULTS (A/F sensor related) on the repair order.
—
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
INSPECT ENGINE OIL LEVEL
•  Switch the ignition off.
•  Inspect the engine oil level.
•  Is the engine oil level sufficient?
Yes
Go to the next step.
No
Add genuine motor oil.
(See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
4
INSPECT INSTALLATION OF OCV FOR NO.1 CYLINDER DEACTIVATION AND OCV FOR NO.4 CYLINDER DEACTIVATION
•  Inspect installation of OCV for No.1 cylinder deactivation and OCV for No.4 cylinder deactivation.
•  Is the OCV for No.1 cylinder deactivation and OCV for No.4 cylinder deactivation installed securely?
Yes
Go to the next step.
No
Retighten the OCV for No.1 cylinder deactivation or OCV for No.4 cylinder deactivation, then go to Step 12.
(See OCV FOR HYDRAULIC VARIABLE VALVE TIMING SYSTEM REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
5
INSPECT SWITCHABLE HLA
•  Inspect the switchable HLA.
•  Is there any malfunction?
Yes
Replace the switchable HLA, then go to the next step.
(See HYDRAULIC LASH ADJUSTER (HLA) REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
No
Go to the next step.
6
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?
Yes
Clean or replace the stuck valve, then go to Step 12.
No
Go to the next step.
7
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?
Yes
Clean or replace the stuck valve, then go to Step 12.
No
Go to the next step.
8
INSPECT ENGINE OIL SOLENOID VALVE
•  Inspect the engine oil solenoid valve.
•  Is there any malfunction?
Yes
Replace the engine oil solenoid valve, then go to the next step.
(See ENGINE OIL SOLENOID VALVE REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
No
Go to the next step.
9
PURPOSE: INSPECT IF INSUFFICIENT HYDRAULIC PRESSURE CAUSED BY USE OF UNSPECIFIED ENGINE OIL
•  Is the specified engine oil being used?
Yes
Go to the next step.
No
Replace the engine oil with genuine motor oil, then go to Step 12.
(See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
10
PURPOSE: INSPECT ENGINE OIL PRESSURE
•  Inspect the engine oil pressure.
•  Is there any malfunction?
Yes
Replace the oil pump, then go to the next step.
(See OIL PUMP REMOVAL/INSTALLATION [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
No
Go to Step 12.
11
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?
Yes
Repair or replace the malfunctioning part according to the inspection results.
Add genuine motor oil, then go to the next step.
(See ENGINE OIL REPLACEMENT [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)].)
No
Go to the next step.
12
VERIFY DTC TROUBLESHOOTING COMPLETED
•  Always reconnect all disconnected connectors.
•  Clear the DTC from the PCM memory using the M-MDS.
•  Start the engine and warm it up completely.
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.
•  Drive the vehicle under the snapshot data condition.
•  Perform the DTC Reading Procedure.
•  Is the same Pending 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.
13
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))].)
No
DTC troubleshooting completed.