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Home >> GMC >> 1991 >> Forward Control 4.3 Z, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - Transmission >> Component Check Charts >> Output Speed Sensor Circuit Check (4WD Vehicles) >> Diagnostic Aids

Diagnostic Aids

Check all connections, especially at the transmission pass-thru connector. If code is intermittent, see INTERMITTENTS in the TESTS W/O CODES article in this section.

Fig 1: Output Speed Sensor Ckt. Schematic (4WD Vehicles)
G91E13700
Fig 2: Output Speed Sensor Ckt. Flow Chart (4WD Vehicles)
G91F13701
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