b****i
发帖数: 108 | 1 Every gasoline engine needs spark, fuel and compression to start and run. Wh
en an engine won't start, an organized approach will help you quickly determ
ine which is missing, and why.
A fellow technician told me many years ago, "If you can't diagnose a no-star
t, you shouldn't be lifting the hood." That statement implies that no-start
diagnosis should be a basic procedure and the foundation for learning how th
e entire vehicle functions. After all, what's more basic than spark, compres
sion, fu | b****i
发帖数: 108 | 2 Cranking
All good diagnostics start at the beginning, and the beginning of a no-start
diagnosis is always the cranking circuit. The cranking circuit, in its most
basic form, consists of the battery, starter and cables that connect these
components. Of course, the ignition switch, starter relays/solenoids and eve
n the theft-deterrent system are important parts of the starting system as w
ell, but to stay focused on cranking, let's concentrate on the battery and s
tarter.
Battery condition should |
|
