Which component prevents starting the engine if the transmission is in drive gear?

Which component prevents starting the engine if the transmission is in drive gear?

• A. Valve Adjusting Cam
• B. Modulator Valve
• C. Neutral Safety Switch
• D. Transmission Manual Valve

Answer: (C)

Starting the engine is controlled by a safety switch that only allows cranking when the transmission is in a safe gear. This function is performed by the neutral safety switch. When the gear selector is in Park or Neutral, the switch completes the starter circuit so the engine can start. If the transmission is in Drive, the switch opens the circuit, preventing the engine from starting to avoid the car moving unexpectedly. The other components have different roles: the valve adjusting cam sets valve clearance in the engine, not related to starting; the modulator valve controls hydraulic pressure for shifting in the automatic transmission; the transmission manual valve guides hydraulic pathways for gear selection. None of these prevent starting when the transmission is in Drive.

Starting the engine is controlled by a safety switch that only allows cranking when the transmission is in a safe gear. This function is performed by the neutral safety switch. When the gear selector is in Park or Neutral, the switch completes the starter circuit so the engine can start. If the transmission is in Drive, the switch opens the circuit, preventing the engine from starting to avoid the car moving unexpectedly.

The other components have different roles: the valve adjusting cam sets valve clearance in the engine, not related to starting; the modulator valve controls hydraulic pressure for shifting in the automatic transmission; the transmission manual valve guides hydraulic pathways for gear selection. None of these prevent starting when the transmission is in Drive.