Which outcome may occur if the TPS voltage exceeds a certain limit?

Which outcome may occur if the TPS voltage exceeds a certain limit?

• A. The engine will stall
• B. The PCM may shut down the alternator
• C. The fuel pump will stop
• D. There will be no effect

Answer: (B)

When the throttle position sensor output goes beyond its expected range, the engine control module treats it as a fault and may take protective actions to safeguard the electrical system. One such action is commanding the alternator to shut down. This limits electrical load and protects the system from abnormal voltages that could come from a faulty sensor reading or regulator issue. The other outcomes aren’t consistent with how the PCM typically responds to an out-of-range TPS input: stalling would be a consequence of throttle control problems, not a deliberate PCM action to disable the alternator; stopping the fuel pump isn’t a standard response to a TPS fault; and there would usually be some effect observed rather than nothing changing at all.

When the throttle position sensor output goes beyond its expected range, the engine control module treats it as a fault and may take protective actions to safeguard the electrical system. One such action is commanding the alternator to shut down. This limits electrical load and protects the system from abnormal voltages that could come from a faulty sensor reading or regulator issue. The other outcomes aren’t consistent with how the PCM typically responds to an out-of-range TPS input: stalling would be a consequence of throttle control problems, not a deliberate PCM action to disable the alternator; stopping the fuel pump isn’t a standard response to a TPS fault; and there would usually be some effect observed rather than nothing changing at all.