Circuit Description
WARNING: This page is about a different car, the 2002 Pontiac Grand Am, 2002 Oldsmobile Alero, 2002 Chevrolet Monte Carlo, and 2002 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
The circuit uses 2 different types of Crankshaft Position (CKP) sensors. The CKP sensor "B" is connected directly to the Ignition Control Module (ICM), and consists of the CKP 1 sensor signal circuit and the low reference circuit.
The CKP sensor "A" connects directly to the Powertrain Control Module (PCM), and consists of the 12-volt reference circuit, the medium resolution engine speed signal circuit and the low reference circuit If PCM detects an incorrect number of CKP pulses, DTC P0336 sets.