GM: Electra/Park Avenue/Ninety-Eight 1990-1993

Functional Check

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If no problem is found during the Visual Inspection, the functional check must be performed. This test requires the use of a bi-directional hand-scanner, such as the General Motors Tech-1 or its equivalent. The scan tool is used to recover and/or clear stored fault codes during testing. The procedure also includes test driving the vehicle if necessary.

If multiple codes are stored, diagnose the code which first appears on the hand scanner.

 
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