Powertrain Control Module

The PCM maintains constant communication with TAC module to operate cruise control system. PCM will not allow activation of cruise control system until both brake switches (cruise control release switch/cruise control brake switch and brakelight switch) and clutch switch (if equipped) signals have been verified at the beginning of the ignition cycle. PCM sets and stores DTCs to identify circuit/component faults in cruise control system. PCM will inhibit cruise control when:

• Engine is off.
• Automatic transaxle is in Park, Reverse, Neutral or 1st gear.
• Manual transaxle is in Neutral.
• Engine speed is too high/low.
• Vehicle speed is too high/low.
• Engine coolant over temperature-fuel disabled mode is active.
• TAC module detects an R/A switch fault
• TAC module detects a SET switch fault.
• ABS/traction control system is active for 2 seconds or more.
• Undercharged or overcharged battery condition exists.
• PCM detects a vehicle speed sensor fault.
• Cruise control release switch (A/T), cruise control brake switch (M/T), clutch pedal position switch (if equipped), or brakelight switch fault is detected.
• An internal PCM fault is detected.