Fuel Pump: Testing and Inspection

Fuel Pump Circuit Schematic:

A faulty fuel pump relay does not set a trouble code in the on-board diagnostic system. Refer to the schematic diagram and test the system with the diagnostic chart.

Wire color code identification:

L: Blue
B: Black
Y: Yellow
G: Green
R: Red
W: White
Br: Brown
Lg: Light green
Gr: Gray

Fuel Pump Circuit Diagnostic Chart (a):

Fuel Pump Circuit Diagnostic Chart (b):

Fuel Pump Circuit Diagnostic Chart (c):

FUEL PUMP CIRCUIT DIAGNOSTIC CHARTS