1A-67 Engine General Information and Diagnosis:
DTC “C41” (P230-H/L): FP Relay Circuit Malfunction
B831G21104020
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
Troubleshooting
CAUTION
!
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.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-13)”.
Detected Condition Possible Cause
C41
No voltage is applied to fuel pump
although fuel pump relay is turned ON, or
voltage is applied to fuel pump, although
fuel pump relay is turned OFF.
• Fuel pump relay circuit open or short.
• Fuel pump relay malfunction.
• ECM malfunction.
P0230
H
Voltage is applied to fuel pump although
fuel pump relay is turned OFF.
• Fuel pump relay switch circuit shorted to power source.
• Faulty fuel pump relay (switch side).
L
No voltage is applied to fuel pump
although fuel pump relay is turned ON.
• Fuel pump relay coil circuit open or short.
• Faulty fuel pump relay (coil side).
ECM
VM
FP
Engine stop
switch
Ignition
switch
Ignition
fuse
Main
fuse
Fuel
fuse
Fuel pump relay
Fuel pump
To the combination
meter
R/B
O/W
Y/R
Y/Bl
20
19
I831G1110077-04
I831G1110019-01
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