Code 54, Fuel Pump Circuit

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

Fig 1: CODE 54, Schematic, Fuel Pump Circuit (4.3L Turbo)

Fig 2: CODE 54, Schematic, Fuel Pump Circuit (3.1L & 4.3L C, K & P Series W/ M/T)

Fig 3: CODE 54, Schematic, Fuel Pump Circuit (3.1L)

Fig 4: CODE 54, Schematic, Fuel Pump Circuit (4.3L S & T Series P/U W/ M/T)

Fig 5: CODE 54, Schematic, Fuel Pump Circuit (4.3L S & T Series Util. W/ M/T & 4.3L L & M Series)

Fig 6: CODE 54, Schematic, Fuel Pump Circuit (4.3L C & K Series W/4L60E Trans.)

Fig 7: CODE 54, Schematic, Fuel Pump Circuit (4.3L G Series W/4L60E Trans.)

Fig 8: CODE 54, Schematic, Fuel Pump Circuit (All Models W/ 4L80E Trans.)

Fig 9: CODE 54, Flowchart, Fuel Pump Circuit (Exc. 3.8L)