FUEL PUMP OPERATION
CHECK |
1. |
Turn the ignition switch
OFF. |
2. |
Using the Hi-scan(Pro)'s actuator test mode
for fuel pump, check that pump operation.
The fuel pump is an in-tank type and its
operation is hard to hear without removing the fuel tank
cap. | |
3. |
Pinch the hose to check that fuel pressure is
felt.

|
FUEL PRESSURE TEST
1. |
Press the two tabs under the rear seat and
raise the seat, then detach the inspection panel of the fuel
pump. |
2. |
To reduce the internal pressure of the fuel
lines and hoses, first start the engine with the fuel pump
disconnected and wait until it stops by itself.
Be sure to reduce the fuel pressure
before disconnecting the fuel main pipe and hose, otherwise
fuel will spill out.

| |
3. |
Disconnect the battery negative (-) terminal
and then connect the fuel pump harness
connector. |
4. |
Using the fuel pressure gauge, adaptor and
connector, install the fuel-pressure gauge to the fuel delivery
pipe. Tighten the bolt to the specified torque.

Tightening
Torque
Fuel pressure gauge to fuel delivery
pipe:
25 - 35Nm (250 - 350 kg.cm, 18 - 26
lb.ft)
| |
5. |
Connect the battery's negative (-)
terminal. |
6. |
Apply battery voltage to the terminal for the
pump drive and activate the fuel pump. Then, with fuel pressure
applied, check that there is no fuel leak from the pressure gauge or
connections. |
7. |
Start the engine and let it
idle. |
8. |
Measure the fuel pressure.
Standard value : 350 kPa (3.5 kg/cm²,
49.8 psi)
| |
9. |
If the result of the measurements made in
steps (7) and (8) are not within the standard value, use the table
below to determine the probable cause, and perform the necessary
repairs.
Condition
|
Probable
cause
|
Remedy
|
Fuel
pressure too low
|
2) |
Fuel leak on the fuel-pressure
regulator that is assembled on fuel pump, caused by poor
seating of the fuel-pressure
regulator. | |
2) |
Repair the leak or replace the
fuel pump. | |
Fuel
pressure too high
|
1) |
Sticking fuel-pressure
regulator. | |
1) |
Repair the leak or replace the
fuel
pump. | |
|
10. |
Stop the engine and check for a change in the
fuel pressure gauge reading, which should hold for approximately 5
minutes. If the gauge indication drops, observe the rate of drop.
Determine and correct the causes according to the following
table.
Condition
|
Probable
cause
|
Remedy
|
Fuel
pressure drops slowly after engine is stopped
|
|
|
Fuel
pressure drops immediately after engine is
stopped
|
1) |
The check valve within the fuel
pump is open | |
|
|
11. |
Release the pressure in the fuel
line. |
12. |
Disconnect the hose and the
gauge.
Cover the hose connection with a shop
towel to prevent splashing of fuel caused by residual fuel
pressure in the fuel
line. | |
13. |
Replace the O-ring at the end of the
hose. |
14. |
Connect the fuel hose to the delivery pipe and
tighten to the specified torque. |
15. |
Check for fuel
leaks. |
1. |
Reduce the internal pressure of the fuel lines
and hoses by completing the following operations.
A. |
After removing the rear seat cushion,
disconnect the fuel pump
harness. |
B. |
Start the engine. Allow it to stop by
itself, then turn the ignition switch
OFF. |
C. |
Disconnect the battery negative (-)
terminal. |
D. |
Connect the fuel pump harness
connector.

| |
2. |
Remove the eye bolts while holding the fuel
filter nuts securely.
Cover the fuel filter with a shop towel
to avoid residual gasoline from
splashing. | |
3. |
Remove the fuel filter mounting bolts, then
remove the fuel filter from the fuel filter
clamp. |
4. |
After replacing the fuel filter, check for
fuel leaks.

|
FUEL SENDER REPLACEMENT
1. |
Remove the fuel tank cap to lower the fuel
tank's internal pressure. |
2. |
Remove the fuel sender mounting screws, then
remove the fuel sender from the fuel tank.

| |