Fuel pressure test port location

Tiny
MAILMD380
  • MEMBER
  • 2001 TOYOTA AVALON
  • 3.0L
  • V6
  • 2WD
  • AUTOMATIC
  • 224,000 MILES
Can you provide a photo and/or diagram with a description of the location of the port to test the fuel pressure on the car listed above?
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Monday, February 25th, 2019 AT 7:12 PM

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Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi and thanks for using 2CarPros.

There is no schrader valve on this vehicle. Instead, you have to access the fuel filter, disconnect it, and place a T in the line with a schrader to attach a fuel pressure gauge. Here are the directions specific to your vehicle for testing pressure. It includes specifications and step by step how it is done. The attached pictures correlate with these directions.
_____________________________

ON-VEHICLE INSPECTION

1. CHECK FUEL PUMP OPERATION

Picture 1
a. Connect a TOYOTA hand-held tester to the DLC3.
B. Turn the ignition switch ON and TOYOTA hand-held tester main switch ON.

NOTE: Do not start the engine.

C. Select the active test mode on the TOYOTA hand-held tester.
D. Please refer to the TOYOTA hand-held tester operator's manual for further details.
E. If you have no TOYOTA hand-held tester, connect the positive (+) and negative (-) leads from the battery to the fuel pump connector (See step 7).

Picture 2

f. Check that there is pressure in the fuel inlet hose from the fuel filter.

HINT: If there is fuel pressure, you will hear the sound of fuel flowing.
If there is no pressure, check these parts:
- Fusible link
- Fuses
- EFI main relay
- Fuel pump
- ECM
- Wiring connections

g. Turn the ignition switch to LOCK.
H. Disconnect the TOYOTA hand-held tester from the DLC3.

Picture 3

2. CHECK FUEL PRESSURE
a. Check the battery positive voltage is above 12 V.
B. Disconnect the negative (-) terminal cable from the battery.
C. Purchase the new No.1 fuel pipe and take out the fuel tube connector from its pipe.
Part No. 23801-20070

Picture 4

d. Remove the fuel hose clamp.

Picture 5
e. Disconnect the No.1 fuel pipe (fuel tube connector) from the fuel filter outlet (under hood).

CAUTION:
- Perform disconnecting operations of the fuel tube connector (quick type) after observing the precautions.
- As there is retained pressure in the fuel pipe line, prevent It from splashing Inside the engine compartment.

Picture 6

f. Install SST (pressure gauge) as shown in the illustration by using SST and fuel tube connector.
SST 09268-41047, 09268-45014
g. Wipe off any splattered gasoline.
H. Reconnect the TOYOTA hand-held tester to the DLC3 (See step 1).
I. Reconnect the negative (-) terminal cable to the battery.
1. Measure the fuel pressure.
Fuel pressure:
301 - 347 kPa (3.1-3.5 kgf/sq. Cm, 44 - 50 psi)
If pressure is high, replace the fuel pressure regulator. If pressure is low, check these parts:
- Fuel hoses and connections
- Fuel pump
- Fuel filter
- Fuel pressure regulator

k. Disconnect the TOYOTA hand-held tester from the DLC3.
L. Start the engine.
M. Measure the fuel pressure at idle.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/sq. Cm, 44 - 50 psi)
n. Stop the engine.
O. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
Fuel pressure:
147 kPa (1.5 kgf/sq. Cm, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.

P. After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST and fuel tube connector to prevent gasoline from splashing.
SST 09268-41047, 09268-45014

Picture 7

q. Reconnect the No.1 fuel pipe (fuel tube connector).

CAUTION: Perform connecting operations of the tube connector (quick type) after observing the precautions.

Picture 8

r. Surely install the hose clamp to the fuel filter with "click" sound.
S. After installing the clamp, check that the clamp is fixed by pulling up to the clamp.
T. Reconnect the negative (-) terminal cable to the battery.
U. Check for fuel leaks.
______________________
To check pump

3. REMOVE REAR SEAT CUSHION
4. REMOVE FLOOR SERVICE HOLE COVER
5. DISCONNECT FUEL PUMP & SENDER GAUGE CONNECTOR

Picture 9

6. INSPECT FUEL PUMP RESISTANCE
Using an ohmmeter, measure the resistance between terminals 4 and 5.
Resistance: 0.2 - 3.0 ohm at 20 C (68 F)
If the resistance is not as specified, replace the fuel pump.

Picture 10

7. INSPECT FUEL PUMP OPERATION
Connect the positive (+) lead from the battery to terminal 4 of the connector, and the negative (-) lead to terminal 5. Check that the fuel pump operates.

NOTE:
- These tests must be done quickly (within 10 seconds) to prevent the coil burning out.
- Keep the fuel pump as far away from the battery as possible.
- Always do the switching at the battery side.

If operation is not as specified, replace the fuel pump or lead wire.

8. Reconnect fuel pump & sender gauge connector
9. Reinstall floor service hole cover
10. Reinstall rear seat cushion

_________________________________________

Let me know if this helps or if you have other questions.

Take care,
Joe
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Monday, February 25th, 2019 AT 9:16 PM

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