P0103
DTC P0103 MASS OR VOLUME AIR FLOW CIRCUIT HIGH INPUT1. OUTLINE OF DIAGNOSIS
Detect open or short circuits of the air flow sensor.
Judge as NG if it is out of specification.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time of the following base value is higher than 0.5 seconds. Judge as OK and clear the NG when the malfunction criteria given are not met.
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
- Air flow meter: Engine load is normally calculated by manifold pressure and engine speed; however, calculated only by manifold pressure.
- EVAP conc. learning (fuel): Not allowed to learn.
- Knock compensation:
- Knock compensation final advance/delay angle value = knock compensation value + whole learning compensation value + portional learning compensation value.
- When normal: Knock compensation value = Fixed at 0 degree CA.
- Failure: Knock compensation value not equal to Fixed at 0 degree CA. (When knock: Max. 12 degrees CA retard)
- Whole learning compensation coefficient update not allowed.
- Portional learning zone compensation value calculation not allowed.
- ISC control: Open loop compensation is set to (1 g/s). Stop calculation of throttle sensor temperature compensation. (Hold the previous value.)
- Purge control: Not allowed to purge.
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)