If you suspect a problem with the fuel pump, check that the fuel pump actually runs; when it is on, you will hear some noise if you listen to the fuel fill port with the fuel fill cap removed. The fuel pump should run for 2 seconds when the vehicle is turned to ON mode. If the fuel pump does not make noise, check as follows:
1.
Under-dash fuse/relay box internal circuit check:
Under-dash fuse/relay box internal circuit check
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.
?3.
Turn the vehicle to the ON mode.
?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
PGM-FI main relay 2: disconnected
Test point 1
PGM-FI main relay 2 4P socket No. 3
Test point 2
Body ground
Is there battery voltage?
YES
Go to step 3.
NO
Go to step 2.
2.
Open wire check (FI MAIN RLY OUT line):
Open wire check (FI MAIN RLY OUT line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Remove PGM-FI main relay 1 (A) from the under-hood fuse/relay box.
Update the PCM if it does not have the latest software or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.?
NO
Go to step 7.
7.
Determine possible failure area (FUEL PUMP RLY OUT line, GND line):
Determine possible failure area (FUEL PUMP RLY OUT line, GND line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
Fuel tank unit 4P connector
?3.
Turn the vehicle to the ON mode, and measure the voltage between test points 1 and 2.
Test condition
Within 2 seconds after Vehicle ON mode
Fuel tank unit 4P connector: disconnected
Test point 1
Fuel tank unit 4P connector No. 1
Test point 2
Body ground
Is there battery voltage?
YES
Go to step 10.
NO
Go to step 8.
8.
Open wire check (FUEL PUMP RLY OUT line):
Open wire check (FUEL PUMP RLY OUT line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Remove PGM-FI main relay 2 (A) from the under-dash fuse/relay box.
?3.
Connect terminals A and B with a jumper wire.
Terminal A
PGM-FI main relay 2 4P socket No. 1
Terminal B
PGM-FI main relay 2 4P socket No. 2
?4.
Turn the vehicle to the ON mode.
?5.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
Fuel tank unit 4P connector: disconnected
PGM-FI main relay 2 :disconnected
PGM-FI main relay 2 4P socket No. 1 and No. 2: jumped
Test point 1
Fuel tank unit 4P connector No. 1
Test point 2
Body ground
Is there battery voltage?
YES
The FUEL PUMP RLY OUT wire is OK. Replace PGM-FI main relay 2.?
NO
Go to step 9.
9.
Open wire check (FUEL PUMP RLY OUT line) 2:
Open wire check (FUEL PUMP RLY OUT line) 2
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
Fuel tank unit 4P connector: disconnected
PGM-FI main relay 2: disconnected
PGM-FI main relay 2 4P socket No. 1 and No. 2: jumped