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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P1514: Throttle Body Performance ("Y" Body) >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

PCM uses Throttle Position (TP) sensor, Barometric Pressure (BARO) sensor, Intake Air Temperature (IAT) sensor and engine RPM inputs to calculate and expected Mass Airflow (MAF) value. PCM compares this value to MAF value and a speed density calculation to verify proper throttle operation.

Conditions for setting DTC are: PCM detects that the difference between actual airflow (MAF) and speed density calculated airflow is greater than expected and condition is present for less than one second.

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