Medallion L4-2165cc 2.2L (1988)
The other steering wheel switch interrupts speed regulation by direct grounding of the control module. The information is sent to the solenoid
deceleration control terminal of the control module which turns the pump solenoid on and vents the vacuum circuit.
Safety
When the engine reaches 5,400 rpm, the overspeed relay becomes energized. The power supply for the cruise control module safety circuit is interrupted
which causes the module to open the ground path. Since the safety solenoid and the pump are no longer operating, the vacuum circuit is inoperative.
Pressure on the brake or clutch pedal will have the same result.
The stop switch also sends information to the control module. The electronics open the ground path. The safety solenoid then vents the circuit.
NOTE:
IT IS STILL POSSIBLE TO EXCEED THE MEMORIZED SPEED BY PRESSING THE ACCELERATOR. WHEN THE PEDAL IS
RELEASED, THE VEHICLE RESUMES ITS REGULATED SPEED. THE RANGE OF OPERATION FOR MEMORIZATION OF A
REGULATED SPEED IS APPROXIMATELY 48 KM/H (30 MPH) TO 129 KM/H (80 MPH).
Component Replacement, Regulator Removal & Installation Information
COMPONENT REPLACEMENT
The servo control (regulator) and the control module are different between the two systems. The control module is serviced as described in M.R. 289.
The regulator is serviced as described in this TSB. All other components are serviced as described in the M.R. 289.
REGULATOR REMOVAL
1.
Press retaining clip (A) holding windshield wiper/washer connector and slide connector out of the bracket.
2.
Position the tie strap (B) so that the windshield wiper/washer connector can be separated. DO NOT cut the tie strap. Separate the connector.
3.
Remove two nuts (C) holding the regulator housing to the inner fender.
