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Home >> Buick >> 1991 >> LeSabre Custom, 4T60/ME9 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Controls - Pin Voltage Charts >> Introduction
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Engine Controls - Pin Voltage Charts: Introduction

PIN VOLTAGE CHARTS are supplied (where available) to speed up the diagnostic process. By checking pin voltages at the electronic control unit, it is possible to determine if the control unit is receiving and transmitting proper voltage signals. Charts may also help determine if control unit harness has shorts or opens.