buick Workshop Repair Guides

Buick Workshop Service and Repair Manuals

Idle Speed Control Motor <--> [Idle/Throttle Speed Control Unit] > < Fast Idle Solenoid <--> [Idle Up Control Valve]|Testing and Inspection
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increased only if A/C is "ON". When de-energized throttle opening is increased regardless of A/C position.

1.

Checks for normal operation of solenoid. With key "ON" engine not running solenoid plunger should extend.

2.

Checks for normal solenoid plunger retraction if "test" terminal is grounded.

Idle Speed Control Motor <--> [Idle/Throttle Speed Control Unit] > < Fast Idle Solenoid <--> [Idle Up Control Valve]|Testing and Inspection