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 controls Powertrain Induced Chassis Pitch (PICP) by grounding control circuit through an internal switch called a driver. The primary function of driver is to supply ground for component being controlled. Each driver has a fault line which is monitored by PCM. When PCM is commanding a component on, voltage on control circuit should be low (near zero). When PCM is commanding a component off, voltage of circuit should be high (near battery voltage). If fault detection circuit senses a voltage other that what is expected, fault line will change causing DTC to set.

PCM receives ignition voltage feed from Electronic Suspension Control (ESC) module from PICP circuit. PCM grounds this circuit when vehicle is accelerating rapidly or braking hard. ESC module commands all four shock absorber solenoids to firm position.

DTC will set when PCM detects that commanded state of driver and actual state do not match and condition met for at least 5 seconds.