Circuit Operation

An electronic controller and electric motor are contained in the cruise control module. The controller monitors vehicle speed and operates the electric motor. In response to the controller, the motor moves a connecting strap that is attached to the cruise control cable. The cable moves the throttle linkage to vary throttle position in order to maintain the desired cruise speed. The cruise control module prevents system engagement below a 40 km/h (25 mph). The module is controlled by switches located on the multi-function lever.

With the ignition switch in "RUN," battery voltage is applied on CKT 339 (PNK) to terminal "F" of the cruise control module. When the cruise "ON"/"OFF" slider switch is moved to the "ON" position, battery voltage is applied on CKT 397 (GRY) to terminal "A" of the cruise control module connector. If the brake pedal is not depressed, battery voltage is present on CKT 420 (PPL) at module terminal "D." If the brake pedal is depressed. battery voltage is present on CKT 20 (LT BLU) at module terminal "G." Terminal "G" must have voltage for cruise control to operate (disable) properly.

When the slider switch is moved to the "R/A" position, battery voltage is applied on CKT 87 (GRY/BLK) to terminal "C" of the module. With the Set/Coast switch depressed, battery voltage is present on CKT 84 (DK BLU) at module terminal "B." Cruise control module connector terminal "K" on CKT 817 (DK GRN/WHT) is the vehicle speed signal terminal. Ground on CKT 451 (BLK/WHT) is at module terminal "E." The cruise control module uses terminal "J" on CKT 396 (LT BLU/BLK) to signal the PCM that cruise control is engaged. The PCM uses terminal "H" on CKT 83 (DK GRN) to inhibit cruise control operation when conditions not consistant with cruise control operation are present. These conditions are listed in Step 1 of Troubleshooting Hints.