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Home >> Mercury >> 1989 >> Tracer 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Tests W/Codes - MPFI >> Switch Monitor Test >> Notes

Switch Monitor Test: Notes

NOTE: All switches must be tested individually. Allowing a switch to remain on while testing another will lead to false test results.

This test checks input signals from the individual input switches to the ECA. Before activating this test, deactivate self-test and turn all accessories off. Place transmission selector in Neutral and proceed to Using STAR Tester or Using Analog Volt/Ohmmeter. If all switches are okay, proceed to CIRCUIT TEST Q.