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Instructions For Using The Sub-Routine Tests

Sub-routines are the following checks which are performed to correct a service code. Be sure to perform check as instructed. After replacing components or repairing circuits, repeat "Functional Test" and check engine operation.

Observe the following instructions when performing sub routines:

Fig 1: Ford MCU System Wiring Diagram Individual tests have partial schematic to aid in servicing.
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Fig 2: Vacuum Diagrams for 2.0L and 2.3L Engines
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