Engine Performance (A8)Câu 107 / 120
The PCM uses the crankshaft position sensor primarily to:
a.Determine engine speed and piston position for ignition and fuel timing
b.Measure intake air temperature
c.Read exhaust oxygen
d.Detect wheel slip
Giải thích
The crankshaft position sensor tells the PCM engine rpm and crank position so it can time spark and injection. Loss of this signal usually prevents the engine from starting. A cam/crank correlation code indicates timing has slipped between the two.
Luyện miễn phí toàn bộ 120 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- Technician A says low fuel pressure can cause a lean misfire and hesitation. Technician B says a clogged fuel filter or weak pump can lower fuel pressure. Who is correct?
- The throttle position sensor (TPS) informs the PCM about:
- A vehicle fails an emissions test for high hydrocarbons (HC). This is most commonly associated with:
- On an OBD-II vehicle, the data link connector (DLC) used to retrieve codes is standardized as a:
- The exhaust gas recirculation (EGR) system reduces which emission by lowering combustion temperature?
- A no-start with no spark and no injector pulse, but a good battery and cranking, most likely points to:
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