| DESCRIPTION |
Hydraulic variable valve timing control system: over-advanced |
| DETECTION CONDITION |
Determination conditions |
- For the advance amount from the maximum exhaust valve retard position, a condition in which the actual advance amount is larger than the target value continues for a specified period of time.
|
| Preconditions |
- Engine coolant temperature: 30 °C {86 °F} or more
- Hydraulic variable valve timing control: feedback mode
- The following DTCs are not detected:
|
| Malfunction determination period |
|
| Drive cycle |
|
| Self test type |
|
| Sensor used |
- CKP sensor
- Exhaust CMP sensor
|
| FAIL-SAFE FUNCTION |
|
| VEHICLE STATUS WHEN DTCs ARE OUTPUT |
- The check engine light may be illuminated depending on the condition.
|
| POSSIBLE CAUSE |
- Hydraulic variable valve timing actuator malfunction
- Timing chain malfunction
- Poor assembly of timing chain
- Mis-detection of exhaust CMP sensor
- OCV malfunction
- Spool valve in OCV is stuck in advanced position
- Engine oil malfunction
- Use of unspecified engine oil
- Low engine oil level
- Low engine oil pressure
- Engine oil runners are clogged or have leakage
- PCM malfunction
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