Testing Notes

NOTE: You should enter this Pinpoint Test only when you have been directed here from Quick Test.


REMEMBER

To prevent the replacement of good components, be aware that the following non-EEC areas may be at fault.

^ Fuel (quality)

^ Basic engine

^ Spark timing


This Pinpoint Test is intended to diagnose only the following:


^ Knock sensor

^ Harness circuits: KS and SIG RTN

^ Processor assembly



DESCRIPTION


The Knock Sensor is used to detect engine detonation (spark knock). As a result, a voltage sent to the processor will lead to spark timing retard.