Fuel Pump Delivery Rate, Checking

Special tools and workshop equipment required

Hand held remote control (jumper).
Multimeter.
Electrical connector test lead set.
Fuel pressure test set.
Measuring container, fuel-resistant.

Test conditions

Battery voltage 12.5 V
Fuel filter OK
Fuel tank at least ¹ /₄ filled.
Fuel pressure regulator OK.
Ignition switched OFF.

Test procedure

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

Start diagnosis

-- Remove the fuel filler cap from fuel filler tube.

-- Remove rear seat bench. Refer to the Repair information.

-- Remove the floor sealing cover.

-- Disconnect the electrical harness connector from the fuel delivery unit.

-- Connect a hand held remote control (jumper) to terminal 1 of the fuel delivery unit and to vehicle battery (+).

-- Connect a jumper wire from terminal 5 of the fuel delivery unit to vehicle Ground.

WARNING:

Fuel system is under pressure! Before opening the system, place rags around the connection area. Then release the pressure by carefully loosening the connection.

-- Disconnect the fuel return line by pressing release buttons.

-- Connect a fuel line from the fuel pressure test set to the disconnected fuel return line and hold it in the measuring container.

-- Press the switch on the hand held remote control (jumper) and operate the fuel pump for 15 seconds.

-- Compare quantity of fuel delivered with minimum delivery rate in the diagram (cm³ /30s).

NOTE:

Voltage at the fuel pump with engine stopped and fuel pump running is approx. 2 volts less than battery voltage.

If minimum delivery quantity is not obtained, the following malfunctions may be present:

If specified value was Not obtained:

Check the following components;

Fuel lines pinched.
Fuel filter restriction.
Fuel pump faulty.

-- Repair or replace the above components as necessary.

-- To replace the fuel filter refer to the Repair information.

-- To replace the fuel pump refer to the Repair information.

Assembly is performed in reverse order of removal. Note the following:

-- Install the rear seat bench. Refer to the Repair information.

Final procedures

After the repair work, the following work steps must be performed in the following sequence:

Check the DTC memory. Refer to DIAGNOSTIC MODE 03 - READ DTC MEMORY .
If necessary, erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY .
If the DTC memory was erased, generate readiness code. Refer to READINESS CODE .