DTC P0066: Air Assisted Injector Control Circuit Or Circuit Low
- OUTLINE OF DIAGNOSIS
Detect the open or short circuit of AAI solenoid valve. Judge NG when the ECM output level is different from actual terminal level.
- COMPONENT DESCRIPTION
- ENABLE CONDITION ENABLE CONDITIONS
Secondary Parameters Enable Conditions Engine speed "GREATER THAN EQUAL TO" 500 rpm Battery voltage "GREATER THAN EQUAL TO" 10.9 V After engine starting 2 seconds or more Ignition switch ON - GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 2 seconds after starting the engine.
- DIAGNOSTIC METHOD
- Abnormality Judgment
Judge NG when the cumulative time until completing the malfunction criteria below becomes more than the time needed for diagnosis (2.5 seconds).
Judgment Value
JUDGMENT VALUE (ABNORMALITY JUDGMENT)Malfunction Criteria Threshold Value Terminal voltage level while ECM sent OFF signal Low level Time Needed for Diagnosis: 2.5 seconds
Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.
- Normality Judgment
Judge OK and clear the NG when the malfunction criteria below are completed.
Judgment Value
JUDGMENT VALUE (NORMALITY JUDGMENT)Malfunction Criteria Threshold Value Terminal voltage level while ECM sent OFF signal High level
- Abnormality Judgment
- DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" was performed
- MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle is completed 3 times in a row
- When "Clear Memory" was performed
- FAIL SAFE
None
- ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)