P0018

DTC P0018 CRANKSHAFT POSITION - CAMSHAFT POSITION CORRELATION (BANK 2)

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of AVCS system.

There are two types of diagnosis: Crankshaft cam timing diagnosis, and slow response diagnosis. Either of these is performed according to the status of the engine while running.

2. COMPONENT DESCRIPTION






3. ENABLE CONDITION
1. Crankshaft Timing Diagnosis

Enable Conditions:

2. Slow Response Diagnosis

Enable Conditions:

4. GENERAL DRIVING CYCLE
1. Crankshaft Timing Diagnosis
Perform the diagnosis continuously after starting engine and while AVCS is not operating.

2. Slow Response Diagnosis
Perform the diagnosis continuously after starting engine and while AVCS is operating.

5. DIAGNOSTIC METHOD
1. Crankshaft Timing Diagnosis
Judge as NG when the timing advance is outside the normal range. Judge as OK when it within the normal range.

Judge as NG when all the following conditions are established and the continuous time is more than 20 seconds. Judge as OK and clear the NG when the following conditions are not established and the continuous time is more than one second.






Time Needed for Diagnosis: 20 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

2. Slow Response Diagnosis
During AVCS control, calculate AVCS deviation separately for positive/negative, and when the calculated value per the set time (30 seconds) is large, this is judged as NG.

Abnormality Judgment
When all of the following conditions are established, judged as OK.






Time Needed for Diagnosis: 30 seconds

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgment
Judges OK when all of the following conditions are established, and clears the NG.






6. DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" is performed

7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle is completed 3 times in a row
- When "Clear Memory" is performed

8. FAIL SAFE
Make the oil flow control solenoid valve drive duty a predetermined value.

9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)