Oxygen Sensor-Incorrect Output Voltage (Service Code 94) (Europe Models)

Oxygen Sensor Removal/Installation

_• Refer to the Oxygen Sensor Removal/Installation in the Electrical System chapter.

Oxygen Sensor Inspection

_• Warm up the engine thoroughly until the radiator fan starts.

_• Turn the ignition switch OFF.

_• Remove:

Left Lower Fairing (see Lower Fairing Removal in the

Frame chapter)

Engine Sprocket Cover (see Engine Sprocket Removal in the Final Drive chapter)

_• Connect a digital voltmeter [A] to the oxygen sensor con-

nector [B] (main harness side), using the needle adapter

set [C].

Special Tool - Needle Adapter Set: 57001-1457

Oxygen Sensor Output Voltage

Connections to Oxygen Sensor Connector Meter (+) → BL/Y lead

Meter (−) → BR/BK lead

_• Remove the air switching valve hose from the fitting.

_• Install the suitable plugs [A] on the fitting [B] and shut off

the secondary air.

_• Turn the ignition switch ON.

_• Start the engine, and let it idle.

_• Measure the output voltage of the sensor with the con-

nector joined.

Oxygen Sensor Output Voltage (with Plugs) Standard: 0.7 V or more

_• Next, remove the plugs from the fitting [A] with idling.

Oxygen Sensor-Incorrect Output Voltage (Service Code 94) (Europe Models)

_• Measure the output voltage of the sensor with the con- nector joined.

Oxygen Sensor Output Voltage (without Plugs) Standard: 0.2 V or less

If the reading is within range (with plugs: 0.7 V or more, without plugs: 0.2 V or less), the oxygen sensor is good. If the reading is without range, inspect the engine and fuel supply system.

If the engine and fuel supply system good, replace the oxygen sensor (see Oxygen Sensor Removal/Installation in the Electrical System chapter).

Oxygen Sensor Circuit

1. ECU

2. Oxygen Sensor

3. Water-proof Joint E

4. Water-proof Joint D

5. Oxygen Sensor Heater Fuse 10 A

6. Main Fuse 30 A

7. Battery

8. Frame Ground

9. Joint Connector

Fi Indicator Light (led)

Inspection Flow Chart

FI Indicator Light (LED)

FI Indicator Light (LED) Inspection

_• Remove the meter unit (see Meter Unit Removal in the Electrical System chapter).

_• Using two auxiliary leads, supply battery power to the FI

indicator light (LED) [A].

12 V Battery [B]

FI Indicator Light (LED) Check

Connector: Meter Connector [C] (disconnected)

Connection: W/BK Lead Terminal [10] of the Meter

→ Battery (+) Terminal

BR/R Lead Terminal [6] of the Meter →

Battery (–) Terminal Criterion: The light (LED) should light.

If the light (LED) does not go on, replace the meter unit (see Meter Unit Removal/Installation in the Electrical Sys- tem chapter).

FI Indicator Light (LED) Circuit

1. ECU

2. Water-proof Joint C

3. Ignition Switch

4. Meter Unit

5. Ignition Fuse 10 A

6. Main Fuse 30 A

7. Battery

8. Frame Ground

9. Joint Connector

ECU Removal

_• Remove:

Seat (see Seat Removal in the Frame chapter)

Grab Rails [A] (see Seat Cover Removal in the Frame chapter)

Center Seat Cover [B] (see Seat Cover Removal in the Frame chapter)

Seat Covers [C] (see Seat Cover Removal in the Frame chapter)

Rear Fender Rear Bolts [D]

_• Pull down the rear fender rear [A].

_• Remove the ECU bracket bolts [A].

_• Take the ECU [B] out along with the harness.

_• Disconnect the ECU lead connectors.

ECU Installation

_• Fit [A] the bracket on the ECU as shown.

ECU

ECU Power Supply Inspection

_• Visually inspect the terminals [A] of the ECU connectors. If the connector is clogged with mud or dust, blow it off

with compressed air.

Replace the main harness if the terminals of the main harness connectors are cracked, bent, or otherwise dam- aged.

Replace the ECU if the terminals of the ECU connectors are cracked, bent, or otherwise damaged.

_• With the ECU connectors [A] connected, check the fol- lowing ground lead for continuity with the ignition switch

OFF, using a tester and needle adapter set. Battery [B]

Tester [C]

Special Tool - Needle Adapter Set: 57001-1457

ECU Grounding Inspection 34, 50, or 51 (BK/Y)

_Terminal ←→ Battery (–) Terminal: 0 Ω

Engine Ground ←→ Battery (–) Terminal: 0 Ω

If no continuity, check the connector, the engine ground lead, or main harness, and repair or replace them if nec- essary.

_• Check the ECU power source voltage with a digital meter [A].

○^{Position the terminal in accordance with terminal numbers}

of ECU connectors [B] in this chapter figure.

Battery [C]

ECU Power Source Inspection Meter Connections:

Between Terminal 16 (BR/W) and Battery (–) Terminal Between Terminal 17 (W/BK) and Battery (–) Terminal