Cruise Control: Service and Repair

Cruise control system, repairing






Note: When troubleshooting:
check vacuum hose on vacuum pump for wear and condition; replace if necessary
check all vacuum hoses for cracks, replace if necessary

Fig. 1 Inductive pickup for cruise control, removing and installing

- detach battery ground strap
- remove instrument panel insert cover and foil, located underneath
- remove drive cable for speedometer
- remove electrical connections to instrument panel insert
- unscrew 4 mounting bolts from instrument panel insert






- remove inductive pickup screws and remove from harness connector

Fig. 2 Switch for cruise control removing and installing

- remove steering column trim






- separate 4-pin terminal connection to switch for cruise control
- pry off cap for horn and remove steering wheel






- remove mounting bolts for steering column switch and remove turn signal with switch for cruise control

Fig. 3 Routing vacuum hoses in engine compartment






- secure vacuum hoses with tie wraps (arrows)

1 - Vacuum pump
2 - Vacuum unit with adjustable link
3 - Vacuum hose to pump
4 - Vacuum hose to vent valves
5 - Vacuum hose to vacuum unit

Fig. 4 Vacuum pump, removing and installing

The vacuum pump is located at the rear right side of the engine compartment.

- pull off vacuum hose and connector






- remove mounting bolts (arrows)

Fig. 5 Vent valve(s), removing and installing

Note: Vehicles with a manual transmission will have a vent valve for the brake and a vent valve for the clutch. Vehicles with an automatic transmission will have a vent valve for the brake pedal only.

- remove steering column trim






- remove vacuum hose and terminal from brake vent valve (1) and clutch vent valve (2)
- unscrew vent valve from the vent clip

CAUTION: Do not damage thread.






When installing vent valve(s) set distance "a", so that the valve(s) are closed when brake and clutch pedals are in rest position, and opened when pedals are actuated.

Fig. 6 Removing and installing cruise control vacuum servo






1 - diaphragm
To check diaphragm:
- disconnect vacuum hose from pump
- press vacuum diaphragm inward then plug detached vacuum hose
diaphragm must NOT move

2 - adjustable link to throttle valve lever
3 - vacuum hose
4 - securing bracket on intake manifold with stud and spacer
5 - nut torque: 4 Nm (3 ft lb)
6 - nut with shoulder torque: 23 Nm (18 ft lb)

Note: The adjustable link is set to zero clearance at idling speed (arrow).

Setting adjustable link

Attach link to throttle valve lever and adjust ball head on vacuum servo so that the adjustable link can be clipped in place without altering the throttle valve lever position.