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Home >> Pontiac >> 2005 >> Vibe Base, FWD, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transmission - Mu5) >> Diagnostic Information and Procedures >> DTC P1780 >> Circuit Description

Circuit Description

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The powertrain control module (PCM) determines when the vehicle is in Park or Neutral gear position through the park/neutral position (PNP) switch. The RED/BLK wire to the PCM is grounded by the PNP switch when the transmission manual selector is in either Park or Neutral gear position.

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