pontiac Workshop Repair Guides

Pontiac Workshop Service and Repair Manuals

Transmission Position Switch/Sensor, A/T|Testing and Inspection|Page 2667 > < Vacuum Advance Control Solenoid|Description and Operation
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Transmission Position Switch/Sensor: Testing and Inspection

Fig. 009 - Wiring Diagram for Chart C-1A Park/Neutral Switch. VIN Z

CHART C-1A

PARK/NEUTRAL SWITCH

(AUTO TRANSMISSION ONLY)

4.3L ENGINE

FUEL INJECTION (TBI)

    The Park/Neutral Switch is closed to ground in Park or Neutral and open in Drive ranges. The ECM supplies 12 volts through an internal resistor to
CKT 434 and senses that the switch is closed when the voltage at terminal B10 drops to less than 1 volt.

Transmission Position Switch/Sensor, A/T|Testing and Inspection|Page 2667 > < Vacuum Advance Control Solenoid|Description and Operation