DTC - General Descriptions

DTC P0014 EXHAUST AVCS SYSTEM 1 (RANGE/PERFORMANCE)

1. OUTLINE OF DIAGNOSIS
Detect the exhaust AVCS system malfunction.
Judge NG when the amount of exhaust AVCS actual timing advance does not approach to the amount of exhaust AVCS target timing advance.

2. COMPONENT DESCRIPTION






3. ENABLE CONDITIONS






4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously after warming up when the engine speed increases and exhaust AVCS operates.

5. DIAGNOSTIC METHOD
1. The differences of exhaust AVCS target timing advance amount and exhaust AVCS actual timing advance amount is large and the condition continues for certain amount of time.
2. When the differences of target timing advance amount and actual timing advance amount is calculated during exhaust AVCS control, the difference per predetermined time is the specified value or larger.

- Abnormality Judgment
Judge as NG when the following conditions are established within the predetermined time.

Judgment Value






Time Needed for Diagnosis: 30000 ms
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

- Normality Judgment
Judge as OK and clear the NG if the following conditions are established within the predetermined time.

Judgment Value






Time Needed for Diagnosis: 30000 ms

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 CONDITIONS
- 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 driving duty a predetermined value (9.36%).

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