DTC P0BB0 Chevrolet

Description

The fuel pump control module 2 monitors the duty cycle and frequency of the signal it receives from the restraints control module (RCM). The fuel pump control module 2 determines if the signal on the event notification signal (ENS) circuit from the RCM is a valid duty cycle and frequency. If the duty cycle or frequency is invalid, the fuel pump control module 2 sends a 40% duty cycle signal on the fuel pump monitor 2 (FPM2) circuit to report the concern to the PCM. The test fails when the fuel pump control module 2 is still reporting that it is receiving an invalid duty cycle or frequency from the RCM after a calibrated amount of time.