Two-step launch control: Technician A says it must be enabled with a clutch pedal; Technician B says you must calibrate the PCM to hold RPM at a specific point. Which technician is correct?

Two-step launch control: Technician A says it must be enabled with a clutch pedal; Technician B says you must calibrate the PCM to hold RPM at a specific point. Which technician is correct?

• A. Technician A
• B. Technician B
• C. Both Technicians A And B
• D. Neither Technician A Nor B

Answer: (B)

Two-step launch control works by the engine control module enforcing a precise high RPM at launch. The essential part is programming the PCM with the target RPM and the logic to hold the engine there when the system is armed. The clutch pedal can be a common way to arm or trigger the system, but it’s not the mechanism that sets the RPM limit itself. Other triggers can be used, and the actual RPM hold comes from the PCM’s calibration. That’s why calibrating the PCM to hold the RPM at a specific point is the correct focus.

Two-step launch control works by the engine control module enforcing a precise high RPM at launch. The essential part is programming the PCM with the target RPM and the logic to hold the engine there when the system is armed. The clutch pedal can be a common way to arm or trigger the system, but it’s not the mechanism that sets the RPM limit itself. Other triggers can be used, and the actual RPM hold comes from the PCM’s calibration. That’s why calibrating the PCM to hold the RPM at a specific point is the correct focus.