Circuit/System Description
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module. The hybrid powertrain control module and each motor control module utilize a programmable logic device to perform certain input and output functions. Motor control module 1 programs the programmable logic device with software at every ignition ON event. Motor control module 1 verifies that the programmable logic device is programmed successfully.