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Cadillac
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1987
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Seville
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Repair and Diagnosis
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Engine Performance
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System
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DFI ECM Tests W/Codes
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Diagnosis & Testing
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Hard Code EO40 - Open Power Steering Pressure CKT
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Failure Conditions:
Failure Conditions:
Power steering switch opens for 10 seconds. ECM sees zero (0) volts on pin D9 and steering input.