FUEL SYSTEM (DFI) 3-107

Warning Indicator Light (LED)

Light (LED) Inspection

○The warning indicator light (LED) [A] is used for the FI indicator, immobilizer indicator (equipped models) and oil pressure warning indicator.

○In this model, the warning indicator light (LED) (FI/immobilizer) blinks by the data sent from the ECU.

•Refer to the Meter Unit Inspection in the Electrical System chapter.

Warning Indicator Light (LED) (FI/Immobilizer) Circuit

1.Meter Unit

2.Warning Indicator Light (LED)

3.ECU

4.Frame Ground

3-108 FUEL SYSTEM (DFI)

ECU

ECU Identification

○Most countries have their own regulations, so each ECU has different characteristic. So, do not confuse ECU with each other and use only the ECU for your model. Otherwise, the motorcycle can not clear the regulation.

ECU Identification

ECU Removal

CAUTION

Never drop the ECU especially on a hard surface. Such a shock to the ECU can damage it.

•Remove the front seat cover (see Seat Cover Removal in the Frame chapter).

•Pull out the relay box [A] and turn signal relay [B] from the rubber protector.

•Lift up the ECU [A] with rubber protector [B] to clear the projections [C].

•Remove:

ECU Connectors [A]

ECU [B] (with Rubber Protector [C])

3-110 FUEL SYSTEM (DFI)

ECU

If the wiring is good, check the power source voltage of the ECU.

NOTE

○Be sure the battery is fully charged.

•Connect the ECU connectors.

•Connect a digital meter [A] to the connector [B] with the needle adapter set.

Special Tool - Needle Adapter Set: 57001-1457

ECU Power Supply Inspection

Connections:

(I)Digital Meter (+) → Terminal 15 (W/Y) Digital Meter (–) → Battery (–) terminal

(II)Digital Meter (+) → Terminal 16 (W/BK)

Digital Meter (–) → Battery (–) terminal

Ignition Switch OFF:

Terminal 15 (W/Y): 0 V

Terminal 16 (W/BK): Battery Voltage

Ignition Switch ON:

All: Battery Voltage

If the reading is out of the specification, check the following.

Main Fuse 30 A (see Fuse Inspection in the Electrical System chapter)

ECU Fuse 10 A (see Fuse Inspection in the Electrical System chapter)

ECU Main Relay (see Relay Circuit Inspection in the Electrical System chapter)

Power Source Wiring (see wiring diagram in this section) If the fuse, wiring and relay are good, replace the ECU

(see ECU Removal/Installation).

FUEL SYSTEM (DFI) 3-111

ECU

ECU Power Source Circuit

1.Ignition Switch

2.ECU

3.Joint Connector C

4.Joint Connector D

5.Fuse Box

6.ECU Fuse 10 A

7.Frame Ground

8.Battery 12 V 8 Ah

9.Main Fuse 30 A

10.Relay Box

11.ECU Main Relay