Mercury MerCruiser MCM 454 Mag MPI Service Manual page 617

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GENERAL SYSTEM DIAGNOSTICS

THESE NOTES APPLY TO FOLLOWING ECM CONNECTOR AND SYMPTOM CHARTS.

The "B+" Symbol indicates a system voltage (battery).

NOTE: 1: Battery voltage for first two seconds, then 0 volts.

NOTE: 2: Varies with temperature.

NOTE: 3: Varies with manifold vacuum.

NOTE: 4: Varies with throttle movement.

NOTE: 5: Less than .5 volt (500 mV).

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SERVICE MANUAL NUMBER 23

90-861326--1 MARCH 1999

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