The function diagram for the BAP sensor includes the following:
• BAP sensor
• Electronic Control Module (ECM)
• Injection Driver Module (IDM)
• Fuel injector
• Exhaust Gas Recirculation (EGR)
• Variable Geometry Turbocharger (VGT)
• ENGINE lamp (amber)
Function
The BAP sensor is a variable capacitance sensor and is located in the cab. The ECM supplies a 5 V reference signal which the BAP sensor uses to produce a linear analog voltage signal that indicates pressure.
The primary function of the BAP sensor is to provide a feedback signal to the ECM to adjust timing and fuel quantity. The ECM monitors the BAP signal to determine altitude, adjust timing, fuel quantity, and inlet air heater operation.
