C41" Fp Relay Circuit Malfunction; C42" Ig Switch Circuit Malfunction - Suzuki GSX-R750 Service Manual

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4-50 FI SYSTEM AND INTAKE AIR SYSTEM

"C41" FP RELAY CIRCUIT MALFUNCTION

DETECTED CONDITION

No signal from fuel pump relay.

• Remove the front and rear seats.

• Lift and support the fuel tank with its prop stay. (4-51)

Turn the ignition switch OFF.

Check the FP relay coupler for loose or poor contacts.

If OK, then check the insulation and continuity. Refer to

page 4-55 for details.

Y/B or O/W wire open or shorted to ground, or poor 9 or

G connection. ( 4-25)

If wire and connection are OK, intermittent trouble or faulty

Recheck each terminal and wire harness for open circuit

and poor connection. ( 4-4)

* Refer to the IGNITION SWITCH INSPECTION for details.

• Remove the right under cowling. ( 6-5)

• Inspect the ignition switch. ( 7-39)

Replace the FP relay with

Replace the ECM with a new one,

and inspect it again.

POSSIBLE CAUSE

• Fuel pump relay circuit open or short.

• Fuel pump relay malfunction.

• ECM malfunction.

ECM couplers

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