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.
VIN E RPO LA1 engines use a PCM 32U. For service, the PCM consists
of two parts: a controller (the PCM without the Knock Sensor module) and the
Knock Sensor module.
