DeVille V8-4.6L VIN Y (1998)
Powertrain Control Module: Description and Operation
PCM Controlled SMCC Cruise Control
Diagnostic Chart
Cruise Control System Description
This powertrain has a Stepper Motor Cruise Control (SMCC) system which closely approximates a stand alone system, except that the SMCC relies on
the PCM to indicate that cruise control is allowed and then signals the PCM when engaged. This is accomplished by using a two wire link between the
PCM and SMCC. These are called the Cruise Inhibit and the Cruise Engaged circuits. If the PCM will allow operation, refer to the Cruise Operation
table, it signals the SMCC on the Cruise Inhibit circuit to allow cruise. Once cruise is engaged by the driver, the SMCC will continuously signal to the
PCM that cruise is engaged using the Cruise Engaged circuit.
Refer to Cruise Control for information regarding the cruise system not related to PCM interaction.
