The Powertrain Control
Module (PCM), located behind the right side of the instrument  panel, behind
                                                                         the
 convenience center.  It controls the following: 
|     •  |  On Board diagnostics for Powertrain functions.  | 
 
 It constantly looks at the information from various sensors, and controls
the systems that affect vehicle performance. The PCM also performs the diagnostic
   function of the system. It can recognize operational problems, alert the
  driver  through the MIL, and store diagnostic trouble  codes which identify
  the problem areas  to aid the technician in making repairs.  Refer to Introduction,
  for more information on using the diagnostic function  of the PCM.