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Suzuki GSX-R 1000 Service Manual: 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

Suzuki GSX-R. 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.
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DTC “c41” (p2505): ecm power input signal malfunction
Detected condition and possible cause Detected condition Possible cause C41/P2505 No voltage is applied to the ecm. Lead wire/coupler connection of ecm t ...

Other materials:

Location of parts
ciutch lever  left handlebar switches indicator lights tachometer ignition switch front brake fluid reservoir  right handlebar switches throttle grip  front brake lever  fuel tank cap front suspension spring pre-load and rebound damping force ...

Engine coolant solution
Use engine coolant that is com· patible with an aluminum radiator, mixed with distilled water at a 50:50 mixture ratio for engine coolant solution. An engine coolant mixture other than 50:50 can affect cooling efficiency or rust inhibiting performance. Engine coolant Engine coolant should b ...

Engine oil
Oil quality is a major contributor to your engine's performance and life. Always select good quality engine oil. Suzuki recommends the use of suzuki performance 4 motor oil or equivalent engine oil. Use sf/sg or sh/ sj with jaso ma in api (american petroleum institute) classification. A ...

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