P0340

DTC P0340 CAMSHAFT POSITION SENSOR "A" CIRCUIT (BANK 1 OR SINGLE SENSOR)

1. OUTLINE OF DIAGNOSIS
Detect the open or short circuit of the camshaft position sensor.
Judge as NG when the number of camshaft signals remains abnormal.




2. COMPONENT DESCRIPTION

3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.

5. DIAGNOSTIC METHOD




Abnormality Judgment
When normal, there should be 3 cam signals per 2 engine revolutions. If a condition where it is not 3 times continues, It is judged as NG.
When the engine speed is over 100 rpm, if the following conditions are established it is judged as NG. Judge as OK and clear the NG when the following criteria are not established.




Normality Judgment
Judge as OK and clear the NG when the following criteria are established.

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
- Ignition timing whole learning compensation:
- Enter the initial value (whole learning compensation factor = 0.5, Variable amount of whole learning compensation factor = 0.25) to the whole learning compensation factor and variable amount of whole learning compensation factor when IG OFF, and then make the whole learning incomplete.
- Enter the initial value (whole learning compensation factor = 0.5, Variable amount of whole learning compensation factor = 0.25) to the whole learning compensation factor and variable amount of whole learning compensation factor when making a normality judgment from abnormality judgment, and then make the whole learning incomplete.

- Ignition timing partial learning compensation:
- Enter the initial value (0 degree CA) to the compensation value of partial learning zone with IG OFF.
- Enter the initial value (0 degree CA) to the compensation value of the partial learning zone when making a normality judgment --> abnormality judgment.

- AVCS control:
- Maximum timing retard learning is not complete or maximum timing retard learning completion is not experienced.
- => ISC feedback compensation: Do not perform the AVCS actual timing advance compensation.
- Make the OCV driving Duty to be the given value (9.36%).

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