Fuel Pump Delivery Quantity, Checking

Special tools and workshop equipment required 

• Switched 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.
• Switch the ignition 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.

-- Remove the floor sealing cover.

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

-- Connect a switched 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.

-- 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 remote control (jumper) and operate the fuel pump for 15 seconds.

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

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

• Fuel lines pinched.
• Fuel filter plugged.
• Fuel pump faulty.

-- If necessary, repair any pinched or plugged lines.

If the filter is restricted; 

-- Replace the fuel filter.

If the fuel pump is faulty; 

-- Replace the fuel pump.

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

-- Install the rear seat bench.

Final procedures 

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

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