Cruise Control - Will Not Maintain Set Speed

Group: 27

Number: 95-02

Date: Dec 6, 1995

Subject:
Cruise Control, Intermittently Will Not Maintain Set Speed

Model(s):
90, A4, A6, Cabrio 1995

Condition

Cruise control, intermittently will not maintain set speed.

Service

If a vehicle exhibits the above condition:

- Disconnect the vacuum hose from the vacuum servo unit and connect vacuum pump US 8026 or equivalent.

- Apply a small amount (approx. 1 to 2 centimeters) of vacuum.

If the vacuum servo unit does not maintain this amount of vacuum:






- Install a new vacuum servo unit (Part Numbers are listed in the table.

Caution:
Part numbers are for reference only. Always check with your Parts Dept. for the latest parts information.

Note:
Testing the vacuum servo unit in a fully collapsed position (by applying thumb over hose) may not indicate a shortcoming. If vacuum servo unit is found to be functional, further diagnosis will be necessary.

- Test drive vehicle and set cruise control at various speeds to verify repair.

When procedure applies to vehicles within warranty use the following:

Part Identifier: 2789

Labor Operation: 2789110 65TU