Code 54, Fuel Pump Circuit

WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 1992 Oldsmobile Bravada, 1992 GMC Vandura Special, 1992 GMC Vandura, 1992 GMC Value Van, and 1992 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.

Code 54 will set if the ECM does not see 12 volts on the fuel pump signal voltage monitor during the first 2 seconds after ignition is turned on.

Fig 1: Code 54 Schematic (Astro, Safari, S & T Series) Fuel Pump Circuit

Fig 2: Code 54 Schematic (C, K, R, V, G, & P Series W/O 4L80-E Trans) Fuel Pump Circuit

Fig 3: Code 54 Schematic (All Models W/4L80-E Trans. Except G Series) Fuel Pump Circuit

Fig 4: Code 54 Schematic (G Series W/4L80-E Trans.) Fuel Pump Circuit

Fig 5: Code 54 Schematic (3.1L) Fuel Pump Circuit

Fig 6: Code 54 Flow Chart Fuel Pump Circuit