Diagnostic Aids
WARNING: This page is about a different car, the 2004 Pontiac Grand Am and 2004 Oldsmobile Alero. However, it is still accessible from the selected car via links, so may be relevant.
The engine will not start when there is a total malfunction of the class 2 serial data circuit while the engine is not running.
The class 2 serial data circuit for the DLC and body control module (BCM) are on a common terminal on the Junction Block-Left I/P.
The class 2 serial data circuit for the electronic brake control module (EBCM) and sensing and diagnostic module (SDM) are on a common terminal on the Junction Block-Left I/P.
The class 2 serial data circuit for the vehicle theft deterrent (VTD) and Radio are on a common terminal on the Junction Block-Left I/P.
The class 2 serial data circuit for the instrument panel cluster (IPC) and powertrain control module (PCM) are on a common terminal on the Junction Block-Left I/P.