Mash Seventy - Page 126

Chapter 4 EI system diagnosis Section 4 EI system troubleshooting
4—31
“P0231” or “P0232” FUEL PUMP RELAY CIRCUIT MALFUNCTION
DETECTED CONDITION POSSIBLE CAUSE
☞
To read the flash code,with the EFI diagnostic
instrument
●
Fuelpumprelaycircuitopenorshort.
●
Fuel pump relaymalfunction.
●
ECUmalfunction.
 INSPECTION
1)
Remove the seat set
2)
Turntheignitionswitchtothe“OFF”position.
3)
Check the fuel pump relay coupler for loose or poorcontacts.
If OK, then check the insulation and continuity.
for details.
: Fuel pump relay①
: Starter relay②
Lamp relay③
: Main relay ④
Is the Fuel pump relay OK?
YES
●
G/Brwire open or shorted to
ground, or poorB9(J2-9)
connection of
ECU coupler.
●
If wire and connection are OK,
intermittent trouble or faulty ECU.
●
Recheck each terminal andwire
harness for open circuit and poor
connection.
●
Inspect the fuel injectors.
NO
Replace the fuel pump relay with a
new one.
B9
B9