Suzuki GSX-R 1000 Service Manual: DTC “c41” (p2505): ecm power input signal malfunction

Suzuki GSX-R 1000 Service Manual / Engine / Engine general information and diagnosis / Diagnostic information and procedures / 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 terminal to fuel fuse.
Fuel fuse.

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” .

Step

Action

Yes

Turn the ignition switch off.
Remove the front seat. Refer to “exterior parts removal and installation” in section 9d .
Check the ecm coupler for loose or poor contacts. If ok, then measure the ecm input voltage.

Disconnect the ecm coupler. Refer to “ecm removal and installation” in section 1c .
Insert the needle pointed probe to ecm coupler.
Measure the voltage between terminal “10” and ground.

Special tool
(a): 09900–25008 (multi circuit tester set) (b): 09900–25009 (needle-point probe set)

Tester knob indication voltage ( )

Ecm input voltage battery voltage ((+) terminal: “10” – (–) terminal: ground)

Ecm couplers (harness side)

Is the voltage ok?

Fuel pump relay circuit malfunction.

Refer to “dtc “c41” (p0230-h/l): fp relay circuit malfunction” .
R/bl wire open or short or poor “10” connection.
Power source of speedometer shorted to the grand or open.
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 .

Open or short circuit in the r/bl wire.

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. ...

DTC “c42” (p1650): ig switch circuit malfunction

Detected condition and possible cause Detected condition Possible cause Ignition switch signal is not input to the ecm. Ignition system circuit open or short. ...

Other materials:

Rear seat
The seat lock is located under the left frame cover. To remove the rear seat, insert the ignition key into the lock and turn it clockwise. Raise the front end of the seat and slide it forward. To reinstall the seat, slide the seat hooks into the seat hook retainers and push down firm ...

Battery visual inspection
Inspect the battery in the following procedures: remove the front seat. Refer to “exterior parts removal and installation” in section 9d (page 9d- 6). Visually inspect the surface of the battery container. If any signs of cracking or electrolyte leakage from the sides of th ...

Isc valve preset and opening initialization
When removing or replacing the isc valve, set the isc valve to the following procedures: turn the ignition switch on. Set up the sds tool. (Refer to the sds operation manual for further details.) Click the “active control”. Click the “isc learned value reset” (1) ...