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Suzuki GSX-R 1000 Service Manual: 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

No

1

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


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

Special tool
(a): 0990025008 (multi circuit tester set) (b): 0990025009 (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:

Cylinder inspection
Refer to engine top side disassembly . Refer to engine top side assembly . Cylinder distortion Check the gasket surface of the cylinder for distortion. Use a straightedge and thickness gauge. Take clearance readings at several places. If any reading exceeds the service limit, replace t ...

Clutch parts inspection
Refer to clutch removal  and clutch installation . Clutch drive and driven plate Note wipe off the engine oil from the drive and driven plates with a clean rag. Measure the thickness of drive plates with a vernier calipers. If the drive plate thickness is found to have ...

Lubrication points
Proper lubrication is important for smooth operation and long life of each working part of your motorcycle and also for safe riding. It is a good practice to lubricate the motorcycle after a long rough ride and after getting it wet it in the rain or after washing it. Major lubrication points ...

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