jaguar Workshop Repair Guides

Jaguar Workshop Service and Repair Manuals

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Supplementary Air Valve <--> [Idle Up Control Valve]|Locations|Page 1778 > < Supplementary Air Valve <--> [Idle Up Control Valve]|Locations

XJ-S Convertible (XJ27) V12-6.0L (1994)

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Supplementary Air Valve: Description and Operation

Supplementary Air Valve

PURPOSE

Supplementary air valve provides additional bypass air to compensate for engine load associated with A/C operation.

OPERATION

During A/C compressor operation, supplementary air valve is activated by compressor relay, permitting increased idle air flow to the right intake
manifold.  When either "N" or "P" shift positions are selected, idle relay switches supplementary air valve "OFF," preventing excessively high idle
speed.

LOCATION

Valve is located beneath right intake manifold plenum.  Idle relay is located on radiator support near A/C compressor clutch.

Supplementary Air Valve <--> [Idle Up Control Valve]|Locations|Page 1778 > < Supplementary Air Valve <--> [Idle Up Control Valve]|Locations