Important Preliminary Checks
Checks
| Action
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Before Using This Section
| Before
using this section, you should have performed the Powertrain On-Board Diagnostic
System Check. Several of the following symptom procedures call for
a careful visual and physical check. The visual and physical checks
are very important. These checks can lead to correcting a problem which
may save valuable time.
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Visual and Physical Checks
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| • | Inspect the vacuum hoses for splits, kinks and proper connections,
as shown on the Vehicle Emission Control Information label. |
| • | Inspect thoroughly for any type of leak or restriction. |
| • | Inspect for air leaks at all the mounting areas of the intake
manifold sealing surfaces. |
| • | Inspect the ignition wires for the following conditions: |
| • | Inspect the wiring for the following items: |
| • | The following symptom tables contain groups of possible causes
for each symptom and cover several engines. The following symptom tables cover
several engines. The order of these procedures is not important. If
the scan tool readings do not indicate the problems, then proceed
in a logical order, easiest to check or most likely to cause first.
In order to determine if a specific vehicle is using a particular
system or component, refer to the Control Module Wiring Diagrams for
an application. |
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Symptom
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- Verify the customer complaint.
- Locate the correct symptom table.
- Inspect the items indicated under that symptom.
- Use the following tables when diagnosing a symptom complaint:
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