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DTC P0010: Engine Oil Control Valve Circuit
 
 
 
 
CIRCUIT OPERATION
  • The engine oil control valve power is supplied from the MFI relay.
  • The ECM controls ground engine oil control valve by turning the power transistor in the ECM "ON" and "OFF".
 
 
TECHNICAL DESCRIPTION
  • The engine oil control valve changes the phase angle to operate the MIVEC system in the advance or the retard side in accordance with signals from the ECM.
 
 
DESCRIPTIONS OF MONITOR METHODS
  • Engine oil control valve circuit current is out of the specified range.
 
 
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
  • Power supply mode of electric motor switch is ON.
  • 12V starter battery positive voltage is between 10 and 16.5 volts.
  • ON duty cycle of the engine oil control valve circuit is higher than 20 percent.
Judgment Criterion
  • The ECM terminal current of engine oil control valve circuit is lower than 0.1 ampere for 2 seconds.
Check Conditions
  • Power supply mode of electric motor switch is ON.
  • 12V starter battery positive voltage is between 10 and 16.5 volts.
Judgment Criterion
  • The ECM terminal current of engine oil control valve circuit is higher than 2.9 amperes for 0.03 second.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • V.V.T.phase angle becomes most retarded angle.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 4 .
 
 
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
  • Engine oil control valve failed.
  • Open or shorted engine oil control valve circuit, harness damage or connector damage.
  • ECM failed.

 
 
DIAGNOSIS
Required Special Tool:
  • MB992110: Power Plant ECU Check Harness
STEP 1. Using scan tool (M.U.T.-IIISE), check actuator test item 17: Engine Oil Control Valve.
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Turn on the power supply mode of the electric motor switch.
(3) Set scan tool (M.U.T.-IIISE) to the actuator test mode for item 17, Engine Oil Control Valve.
  • An operation sound should be heard and vibration should be felt when the engine oil control valve is operated.
(4) Turn off the power supply mode of the electric motor switch.
Is the actuator 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 engine oil control valve.
(1) Disconnect the engine oil control valve connector and measure at engine oil control valve side.
(2) Measure the resistance between engine oil control valve side connector terminals.
Standard value: 6.9 - 7.9 ohms [at 20°C (68°F)]
Is the measured resistance between 6.9 and 7.9 ohms [at 20°C (68°F)]?
Go to Step 3.
Replace the engine oil control valve. Then go to Step 8.
 
STEP 3. Measure the power supply voltage at engine oil control valve harness side connector.
(1) Disconnect the engine oil control valve connector and measure at the harness side.
(2) Turn on the power supply mode of the electric motor switch.
(3) Measure the voltage between terminal power supply line and ground.
  • Voltage should be 12V starter battery positive voltage.
(4) Turn off the power supply mode of the electric motor switch.
Is 12V starter battery positive voltage (approximately 12 volts) present?
Go to Step 4.
Repair or replace the connector(s), or check and repair the harness of short to ground and open circuit in power supply line between MFI relay connector and engine oil control valve connector. Then go to Step 8.
 
STEP 4. Measure the power supply voltage at ECM connector by using power plant ECU check harness special tool MB992110.
(1) Disconnect all ECM connectors. Connect the power plant ECU check harness special tool MB992110 between the separated connectors.
(2) Turn on the power supply mode of the electric motor switch.
(3) Measure the voltage between terminal OCVI and ground.
  • Voltage should be 12V starter battery positive voltage.
(4) Turn off the power supply mode of the electric motor switch.
Is 12V starter battery positive voltage (approximately 12 volts) present?
Go to Step 5.
Repair or replace the connector(s), or check and repair the harness of short to ground and open circuit in OCVI line between engine oil control valve connector and ECM connector. Then go to Step 8.
 
STEP 5. Check of harness damage in power supply line between MFI relay connector and engine oil control valve connector.
Is the harness wire in good condition?
Go to Step 6.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 6. Check of harness damage in OCVI line between engine oil control valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 7.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 7. Using scan tool (M.U.T.-IIISE), check actuator test item 17: Engine Oil Control Valve.
(1) Turn on the power supply mode of the electric motor switch.
(2) Set scan tool (M.U.T.-IIISE) to the actuator test mode for item 17, Engine Oil Control Valve.
  • An operation sound should be heard and vibration should be felt when the engine oil control valve is operated.
(3) Turn off the power supply mode of the electric motor switch.
Is the actuator 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 .
Replace the ECM (Refer to Removal and Installation ). Then go to Step 8.
 
STEP 8. Test the OBD-II drive cycle.
(1) Carry out test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 4 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0010 set?
Retry the troubleshooting.
The inspection is complete.