Diagnostic Strategies

Road test vehicle to verify reports of speed control system malfunction. The road test should include attention to the speedometer. Speedometer operation should be smooth and without flutter at all speeds or surging may be caused in the speed control system.

INOPERATIVE SYSTEM

If road test verifies an inoperative system check and verify the following:
1. Inspect system electrical connections for loose, corrosion or bent terminals.
2. Verify correct installation and condition of vacuum hoses.
3. Check for correct installation of vacuum check valve. End marked VAC must point toward vacuum source.