12-56 FI SYSTEM DIAGNOSIS
“41” (P0230) FP RELAY CIRCUIT MALFUNCTION
NOTE:
After repairing the trouble, clear the DTC using SDS tool. (
12-21)
INSPECTION
Step 1
1) Stop the engine.
2) Remove the fuel tank. (
13-2, -3)
3) Check the ECM coupler
1
for loose or poor contacts.
If OK, then measure the FP relay input voltage.
4) Remove the ECM bracket mounting bolts
2
.
5) Disconnect the ECM coupler
1
.
DETECTED CONDITION
POSSIBLE CAUSE
No voltage is applied to the fuel pump although FP
relay is turned ON.
• FP relay circuit open or short.
• FP relay (ECM) malfunction.
ECM
Regulator
/rectifier
Condenser
Magneto
Fuel
pump
relay
Fuel pump
M
FPP
FP
B/R
R/B
When using the multi circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle-pointed tester probe to prevent the terminal damage or terminal bend.
1
