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

Suzuki GSX-R 1000 Service Manual / Engine / Engine general information and diagnosis / Diagnostic information and procedures / 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

Turn the ignition switch off.
Remove the frame covers. Refer to “exterior parts removal and installation” in section 9d .
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

Turn the ignition switch off.
Remove the frame covers. Refer to “exterior parts removal and installation” in section 9d .
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

Turn the ignition switch off.
Remove the frame covers. Refer to “exterior parts removal and installation” in section 9d .
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.

DTC “c40” (p0505 / p0506 / p0507): isc valve circuit malfunction

Detected condition and possible cause Detected condition Possible cause C40/P0505 The circuit voltage of motor drive is unusual. Isc valve circuit open or ...

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:

Cooling circuit inspection
Do not open the radiator cap when the engine is hot, as you may be injured by escaping hot liquid or vapor. When removing the radiator cap tester, put a rag on the filler to prevent the engine coolant from spraying out. Inspect the cooling ...

Turn signal / side-stand relay inspection
Refer to “electrical components location” in section 0a . Note make sure that the battery is fully charged. Before removing the turn signal/side-stand relay, check the operation of the turn signal light. If the turn signal light does not illuminate, inspect the bulb, turn signa ...

Diagnostic information and procedures
Engine lubrication symptom diagnosis Oil pressure check Check the engine oil pressure periodically. This will give a good indication of the condition of the moving parts. Note before checking the oil pressure, check the following. Oil level (refer to “engine oil and fi ...