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Reading Service Codes

WARNING: This page is about a different car, the 1995 Ford Aspire. However, it is still accessible from the selected car via links, so may be relevant.

Engine control system communicates malfunctions to technician through service codes. These service codes are 2-digit numbers representing a particular defect. Service codes are transmitted through STO connector.

Service codes are displayed as timed pulses, and may be read with a VOM, NGS, or Super Star II tester. VOM displays codes by needle sweeps. See Figure .

Turn ignition off. Follow all procedures of EQUIPMENT HOOK-UP. Engine should be at normal operating temperature.

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