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Home >> Cadillac >> 1999 >> Seville STS V8-4.6L VIN 9 >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data, Normal Values and Definitions >> Scan Tool Data Definitions - Powertrain Systems >> PSP Switch

PSP Switch

Display shows Normal or HI Press. The PCM compensates engine idle depending on steering load condition. Scan tool will display HI Press. due to increase of power steering fluid pressure while turning the steering wheel. Scan tool displays Normal under no load condition.
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