DTC “c41” (p0230-h/l): fp relay circuit malfunction

Detected condition and possible cause

Detected condition			Possible cause
C41		No voltage is applied to fuel pump.	Fuel pump relay circuit open or short. Fuel pump relay malfunction. Fuel pump relay switch circuit is shorted to power source. Faulty pump relay (switch side). Fuel pump relay coil circuit open or short. Faulty pump relay (coil side).
P0230	H	Voltage is applied to fuel pump although fuel pump relay is turned off.
	L	No voltage is applied to fuel pump although fuel pump relay is turned on.

Wiring diagram

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 terminal damage.

Note

after repairing the trouble, clear the dtc using sds tool. Refer to “use of sds diagnosis reset procedures” .

C41 (use of mode select switch)

Step	Action	Yes	No
1	1 Turn the ignition switch off. 2 Remove the frame covers. Refer to “exterior parts removal and installation” in section 9d . 3 Check the fp relay coupler (1) for loose or poor contacts.

If ok, then check the fp relay. Refer to “fuel pump relay inspection” in section 1g .

Is the fp relay ok?

• Ecm power input signal malfunction.

Refer to “dtc “c41” (p2505): ecm power input signal malfunction” .

Y/b or o/w wire open or short or poor “40” connection.

Y/r or r/bl wire open, shorted or poor “24” connection.

If wire and connection are ok, intermittent trouble or faulty ecm.

Recheck each terminal and wire harness for open circuit and poor connection.

Replace the ecm with a known good one, and inspect it again. Refer to “ecm removal and installation” in section 1c .

Replace the fp relay with a new one. P0230-h (use of sds)

Step	Action	Yes	No
1	1 Turn the ignition switch off. 2 Remove the frame covers. Refer to “exterior parts removal and installation” in section 9d . 3 Check the fp relay coupler (1) for loose or poor contacts.

If ok, then check the fp relay. Refer to “fuel pump relay inspection” in section 1g .

Is the fp relay ok?

• Y/b wire shorted to power source.
• Y/b wire shorted to ground.
• If wire and connection are ok, intermittent trouble or faulty ecm.
• Recheck each terminal and wire harness for open circuit and poor connection.
• Replace the ecm with a known good one, and inspect it again. Refer to “ecm removal and installation” in section 1c .

Replace the fp relay with a new one. P0230-l (use of sds)

Step	Action	Yes	No
1	1 Turn the ignition switch off. 2 Remove the frame covers. Refer to “exterior parts removal and installation” in section 9d . 3 Check the fp relay coupler (1) for loose or poor contacts.

If ok, then check the fp relay. Refer to “fuel pump relay inspection” in section 1g .

Is the fp relay ok?

• Y/b wire open or poor “40” connection.
• O/w wire open or shorted to ground.
• R/bl or y/r wire open or shorted to ground, or poor “24” connection.
• If wire and connection are ok, intermittent trouble of faulty ecm.
• Recheck each terminal and wire harness for open circuit and poor connection.
• Replace the ecm with a known good one, and inspect it again. Refer to “ecm removal and installation” in section 1c .

Replace the fp relay with a new one.