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DTC P0014: Exhaust Variable Valve Timing System Target Error
 
 
 
 
CIRCUIT OPERATION
Refer to DTC P0013 - Exhaust Engine Oil Control Valve Circuit .
 
 
TECHNICAL DESCRIPTION
  • The ECM controls the spool valve position of the exhaust engine oil control valve corresponding to the driving condition of the engine and continuously changes the phase of the exhaust camshaft.
  • The phase angle of the exhaust camshaft is computed from the signal patterns of the crank angle sensor and exhaust camshaft position sensor.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • The difference between the actual exhaust valve closing timing and the exhaust valve target closing timing is over the specified value.
 
 
MONITOR EXECUTION
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set in memory for the item monitored below)
  • Not applicable
Sensor (The sensor below is determined to be normal)
  • Camshaft position sensor
  • Crankshaft position sensor
  • Engine coolant temperature sensor
  • Throttle position sensor
  • Engine oil control valve
 
 
DTC SET CONDITIONS
Logic Flow Chart
Check Conditions
  • More than 20 seconds have passed since the engine starting sequence was completed.
  • Engine speed is more than 1,188 r/min.
  • Engine coolant temperature is higher than 76°C (169°F).
Judgment Criterion
  • The difference between the actual exhaust valve opening timing and the exhaust valve target opening timing is more than 5 degrees for 5 seconds.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • None.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 8 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are: )
  • Exhaust engine oil control valve failed.
  • Harness damage in exhaust engine oil control valve circuit or loose connector contact.
  • Failed timing sprocket operation.
  • Clogged oil passage.
  • Exhaust camshaft failed.
  • ECM failed.

 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), check data list item 39: Exhaust MIVEC phase angle.
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE) to the data link connector.
(2) Start the engine.
(3) Set scan tool (M.U.T.-IIISE) to the data reading mode for item 39, Exhaust MIVEC phase angle.
  • When the idle operation with no load, -2.5 to 6.5 °CA (ATDC).
  • When the high load operation, Increases (retards).
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Are they operating properly?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 2.
 
STEP 2. Check the exhaust engine oil control valve.
Refer to Engine Oil Control Valve Check .
Is the check result normal?
Go to Step 3.
Replace exhaust engine oil control valve. Then go to Step 9.
 
STEP 3. Check of harness damage in OCVE line between exhaust engine oil control valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 9.
 
STEP 4. Check of harness damage in power supply line between MFI relay connector and exhaust engine oil control valve connector.
Is the harness wire in good condition?
Go to Step 5.
Repair the connector(s) or wiring harness. Then go to Step 9.
 
STEP 5. Check exhaust camshaft sensing ring.
Is the check result normal?
Go to Step 6.
Replace the exhaust camshaft. Then go to Step 9.
 
STEP 6. Check exhaust variable valve timing sprocket operation mechanism for being stuck.
Refer to GROUP 11B, Timing Chain - Inspection .
Is the check result normal?
Go to Step 7.
Repair it. Then go to Step 9.
 
STEP 7. Check oil passage of exhaust variable valve timing control system for being clogged.
Is the check result normal?
Go to Step 8.
Repair it. Then go to Step 9.
 
STEP 8. Check the trouble symptoms.
(1) Carry out test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 8 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0014 set?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 9.
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
 
STEP 9. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 8 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0014 set?
Retry the troubleshooting.
The inspection is complete.