Section 36 (Engine Controls - Pin Voltage Charts): Introduction
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1994 GMC Yukon, 1994 GMC Suburban, 1994 GMC Pickup, 1994 GMC Cab & Chassis, and 1994 GMC C3500 HD. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
The following figures are courtesy of General Motors Corp.
Pin voltage charts are supplied (when available) to reduce diagnostic time. Checking pin voltages at the electronic control unit determines whether it is receiving and transmitting proper signals. Charts may also help determine if control unit harness is shorted or open.
NOTE:
Unless stated otherwise in testing procedures, perform all voltage tests with a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.