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How to Read Flowcharts
A flowchart is designed to be used from start to final repair. lt's like a map showing you the shone$ distance. But beware:
if you go off the "map" anywhere but a "stop" symbol, you can easily get lost.
FTARN
(bold type)
FcroNl
@>
sroFl
(bold type)
NOTE:
. The term "lntermittent Failure" is used in these chans. lt simply means a system may have had a failure, but it checks
out OK at this time. lf the Malfunction lndicator Lamp (MlL) on the dash does not come on, check for poor connections
or loose wires at all connectors related to the circuit that you are troubleshooting (see illustration below).
.
Most of the troubleshooting flowcharts have you reset the Engine Control Module (ECM) and try to duplicate the
Diagnostic Trouble Code (DTC). lf the problem is intermittent and you can't duplicate the code, do not continue through
the flowchart. To do so will only result in confusion and, possibly, a needlessly replaced ECM.
.
"Open" and "Short"
are common electrical terms. An open is a break in a wire or at a connection. A short is an acci-
dental connection of a wire to ground or to another wire. In simple electronics, this usually means something won,t
work at all. In complex electronics (like ECM's), this can sometimes mean something works, but not the way rr s sup-
posed 10.
Describes the conditions or situation to start a troubleshootinq flowchart
Asks you to do something; perform a test, set up a condition etc.
Asks you about the result of an action, then sends you in the appropriate troubleshooting direction.
The end of a series of actions and decisions, describes a final repair action and sometimes direcls you to
an earlier part of the flowchart to confirm your repair.
11-47
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Table of Contents
Troubleshooting
