Circuit Description

Normally PCM commands Boost Control (BC) solenoid to operate at 100 percent (ON) Pulse Width Modulation (PWM) to allow for full intake boost upon demand. If Reverse is selected, PCM detects rapid deceleration, or engine is load is extremely high, PCM commands BC solenoid to operate at zero percent (OFF) PWM.

Conditions required to set DTC are:

• IAT greater than 14°F (-10°C).
• Engine torque exceeds maximum predetermined torque threshold value.
• Conditions are present for at least 20 seconds.