Suzuki GSX-R 1000 Service Manual: DTC “c41” (p0230-h/l): fp relay circuit malfunction

Detected condition

Possible cause

C41

• 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

L

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.

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

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 .

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 .

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 .