Before Using This Section
| Before using this section, you should have
performed the AF Powertrain OBD System Check and determined the following
conditions:
| • | The control module and malfunction indicator lamp (MIL) are operating
correctly. |
| • | There are no diagnostic trouble codes (DTCs) stored, or a DTC
exists but without the MIL. |
Several of the following symptom procedures require a careful visual
and physical inspection. These inspections are very important. The inspections
can lead to correcting a problem without further inspections, which may
save valuable time.
|
Visual and Physical Checks
|
| • | Inspect the control module grounds. The grounds should be clean,
tight and in their proper location. |
| • | Inspect the vacuum hoses for splits, kinks and the 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. |
| • | Verify the proper installation of the gas distribution adapter
(GDA). |
| • | Inspect for air leaks at the GDA. |
| • | Inspect the ignition wires for the following conditions: |
| • | Inspect the wiring for the following conditions: |
| • | The following symptom tables contain groups of possible causes
for each symptom and 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 inspect or most likely to cause
first. |
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