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DTC P0010: Intake
Engine Oil Control Valve Circuit
CIRCUIT OPERATION
- The intake engine oil control valve power is supplied
from the MFI relay (terminal No. 2).
- The ECM controls ground intake engine oil control valve by turning the power transistor
in the ECM "ON" and "OFF".
TECHNICAL DESCRIPTION
- The intake 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
Intake engine oil control valve circuit current is
out of the specified range.
MONITOR EXECUTION
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory
for the item monitored below)
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
- Ignition switch is "ON" position.
- Battery positive voltage is between 10 and 16.5 volts.
- ON duty cycle of the intake engine oil control valve circuit is more than 20 percent.
Judgement Criterion
- The ECM terminal current of intake engine oil control valve circuit is less than
0.1 ampere for 2 seconds.
Check Conditions
- Ignition switch is "ON" position.
- Battery positive voltage is between 10 and 16.5 volts.
Judgement Criterion
- The ECM terminal current of intake engine oil control valve circuit is more than
2.9 amperes for 0.1 second.
FAIL-SAFE AND BACKUP FUNCTION
- V.V.T. phase angle (intake) becomes most retarded angle.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern
23 
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TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Intake engine oil control valve failed.
- Open or shorted intake engine oil control valve circuit, or harness damage, or connector damage.
- ECM failed.
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Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A
- MB992110: Power Plant ECU Check Harness
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STEP 1. Using scan tool MB991958, check actuator test item
17: Engine Oil Control Valve.
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| caution |
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"
(OFF) position before connecting or disconnecting scan tool MB991958.
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(1)Connect scan tool MB991958 to the data link connector.
(2)Turn the ignition switch to the "ON" position.
(3)Set scan tool MB991958 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 intake engine oil control valve is operated.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
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 Cope with Intermittent
Malfunctions .
 Go to Step 2.
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STEP 2. Check harness connector B-18 at intake engine oil control
valve for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 3.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 12.
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STEP 3. Check the intake engine oil control valve.
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(1)Disconnect the intake engine oil control valve connector B-18.
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(2)Measure the resistance between intake engine oil control valve side connector terminal
No. 1 and No. 2.
Standard value: 6.9 - 7.9 Ω [at 20°C (68°F)]
Q.
Is the measured resistance between 6.9 and 7.9 Ω [at 20°C
(68°F)]?
Go to Step 4.
Replace the intake engine oil control valve. Then go to Step 12.
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STEP 4. Measure the power supply voltage at intake engine oil control
valve harness side connector B-18.
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(1)Disconnect the connector B-18 and measure at the harness side.
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(2)Turn the ignition switch to the "ON" position.
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(3)Measure the voltage between terminal No. 2 and ground.
- Voltage should be battery positive voltage.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is battery positive voltage (approximately 12 volts) present?
Go to Step 6.
Go to Step 5.
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STEP 5. Check harness connector A-30X at MFI relay for damage.
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Q.
Is the harness connector in good condition?
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Check harness connector A-60 at intermediate connector for damage, and repair
or replace as required. Refer to GROUP 00E, Harness Connector Inspection .
If intermediate connector is in good condition, repair harness wire between MFI relay connector
A-30X (terminal No. 2) and intake engine oil control valve connector B-18 (terminal No. 2) because
of open circuit or short circuit to ground. Then go to Step 12.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 12.
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STEP 6. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 7.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 12.
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STEP 7. Measure the power supply voltage at ECM connector B-108 by
using power plant ECU check harness special tool MB992110.
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(1)Disconnect all ECM connectors. Connect the power plant ECU check harness special
tool MB992110 between the separated connectors.
(2)Turn the ignition switch to the "ON" position.
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(3)Measure the voltage between terminal No. 1 and ground.
- Voltage should be battery positive voltage.
(4)Turn the ignition switch to the "LOCK" (OFF) position.
Q.
Is battery positive voltage (approximately 12 volts) present?
Go to Step 8.
Repair harness wire between intake engine oil control valve connector B-18 (terminal
No. 1) and ECM connector B-108 (terminal No. 1) because of open circuit or short circuit to
ground. Then go to Step 12.
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STEP 8. Check harness connector A-30X at MFI relay for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 9.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 12.
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STEP 9. Check for harness damage between MFI relay connector A-30X
(terminal No. 2) and intake engine oil control valve connector B-18 (terminal No. 2).
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| note |
Check harness after checking intermediate connector A-60. If intermediate connector is
damaged, repair or replace it. Refer to GROUP 00E, Harness Connector Inspection . Then
go to Step 12.
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Q.
Is the harness wire in good condition?
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Go to Step 10.
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Repair it. Then go to Step 12.
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STEP 10. Check for harness damage between intake engine oil control
valve connector B-18 (terminal No. 1) and ECM connector B-108 (terminal No. 1).
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Q.
Is the harness wire in good condition?
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Go to Step 11.
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Repair it. Then go to Step 12.
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STEP 11. Check the trouble symptoms.
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(1)Carry out test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II
Drive Cycle - Pattern 23 .
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(2)Check the diagnostic trouble code (DTC).
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, Diagnosis - ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, Diagnosis - ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 12.
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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 .
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STEP 12. Test the OBD-II drive cycle.
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(1)Carry out test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II
Drive Cycle - Pattern 23 .
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(2)Check the diagnostic trouble code (DTC).
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Retry the troubleshooting.
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The inspection is complete.
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