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. 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.
Determine possible failure area (FI MAIN RLY OUT line, others):
Determine possible failure area (FI MAIN RLY OUT line, others)
Repair an open in the FI MAIN RLY OUT wire between the relay circuit board and PGM-FI main relay 2.?
3.
Open wire check (IG1 FUEL PUMP line):
Open wire check (IG1 FUEL PUMP line)
?1.
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 (female terminals) No. 1:
Test point 2
Body ground
Is there battery voltage?
YES
Go to step 4.
NO
Check the No. B8 (20 A) fuse in the under-dash fuse/relay box. If the fuse is OK, repair an open in the IG1 FUEL PUMP wire between the No. B8 (20 A) fuse and PGM-FI main relay 2. If needed, replace the under-dash fuse/relay box.?
4.
Open wire check (FUEL PUMP RLY CL- line):
Open wire check (FUEL PUMP RLY CL- line)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Jump the SCS line with the HDS, and wait more than 1 minute.
?3.
Disconnect the following connector.
PCM connector No. 2 (58P)
?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
PGM-FI main relay 2: disconnected
PCM connector No. 2 (58P): disconnected
Test point 1
PGM-FI main relay 2 4P socket (female terminals) No. 4:
Remove the jumper wire from PCM connector No. 2 (58P).
?4.
Reconnect PCM connector No. 2 (58P).
?5.
Exit the SCS mode with the HDS.
?6.
Turn the vehicle to the ON mode, and measure the voltage between test points 1 and 2.
Test condition
Within 2 seconds after turning vehicle to ON mode
PGM-FI main relay 2: disconnected
Test point 1
PGM-FI main relay 2 4P socket (female terminals) No. 3:
Test point 2
Body ground
Is there battery voltage?
YES
Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. 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)
