Fuel Pump Relay And Transfer Pump Electrical, Checking: Notes

NOTE:

When the Ignition is Switched to the On position; The fuel injectors receive voltage to terminal 1 along with the fuel pump getting activated for 2 seconds to build up the pressure in the fuel system.

Special tools and workshop equipment required

Multimeter.
Electrical connector test lead set.

Test conditions

Battery voltage at least 12.5 volts..
Fuel filter OK.
Switch the ignition Off.

Test procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK

Start diagnosis

Make sure the engine is at room temperature.

-- Disconnect the Fuel Pump Relay -J17- electrical harness connector. Refer to applicable wiring diagram for proper relay location.

-- Switch the ignition ON.

-- Using a Multimeter, Check the Fuel Pump Relay -J17- electrical harness connector terminals 1 and 3 to Engine ground for voltage.

Specified value: Battery Voltage

-- Switch the ignition Off.

Continue test according to the following table:

Value	Cause	Test
If the specified value was not obtained:	Open or shorted circuit	Checking wiring FUEL PUMP RELAY AND TRANSFER PUMP ELECTRICAL, CHECKING => Checking wiring
If the specified value was obtained:	Check reference signal circuit	Checking Activation FUEL PUMP RELAY AND TRANSFER PUMP ELECTRICAL, CHECKING => Checking Activation