Test M Vacuum System Test

TEST M: VACUUM SYSTEM TEST

1. Check for a blocked or leaking vacuum source.

2. If the vacuum source is good, plug the Vacuum Release Port and repeat Test 6 of the Isolation Test.

^ If the vacuum now holds the throttle open, repair or replace the Cruise Control Vacuum Release Valve or the hose to it.

^ If the test still fails, replace the Cruise Control Servo.