Before Using This Section
Before using this section, you should have performed the Diagnostic
System Check-Engine Controls and determined that the following criteria:
- The control module and the malfunction indicator lamp (MIL) are
operating correctly.
- There are no diagnostic trouble codes (DTCs) stored, or a DTC
exists but without MIL.
Several of the following symptom procedures call for a careful visual
and physical inspection. The visual and physical inspection is very important.
The inspection can lead to correcting a problem without further inspection
which may save valuable time.
Visual and Physical Inspection
Inspect the following items:
| • | The control module grounds for being clean, tight, and in their
proper location. |
| • | The vacuum hoses for splits, kinks, and proper connections, as
shown on the Vehicle Emission Control Information label. |
| • | The wiring for the following items: |
| • | The following symptom tables contain groups of possible causes
for each symptom. 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. In order
to determine if a specific vehicle is using a particular system or
component, refer to
Engine Controls Schematics
for an application. |
Verify Customer's Concern
Locate the correct symptom table. Inspect the items indicated under
that symptom from the following symptom tables:
