Engine Performance (A8)第 107 / 120 题
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
解析
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.
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