If this service code appears, check that the following parts are correctly.
Crankshaft Sensor Gear Position Switch Starter Lockout Switch Main Throttle Sensor Rear Wheel Rotation Sensor
If these parts are normal, check the ESD ECU for its ground and power supply (see ESD ECU Power Supply Inspection).
ESD ECU Removal
ESD ECU Installation
Refer to the ESD (Electronic Steering Damper) ECU Installation in the Steering chapter.
ESD ECU Power Supply Inspection

If the connector is clogged with mud or dust, blow it off with compressed air.
If the terminals of the main harness connector are damaged, replace the main harness.
If the terminals of the ESD ECU connectors are damaged, replace the ESD ECU.
Special Tool - Hand Tester: 57001-1394

ESD ECU Grounding Inspection Connections: (I) BK/Y lead (ESD ECU terminal 9) ←→ Battery (–) Terminal (II) Engine Ground ←→ Battery (–) Terminal Criteria: Both: 0 Ω
If no continuity, check the connector, the engine ground lead, or main harness, and repair or replace them if necessary.
If the wiring is good, check the power source voltage of the ESD ECU.
NOTE
Be sure the battery is fully charged.

Special Tool - Needle Adapter Set: 57001-1457
ESD ECU Power Supply Inspection Connections:
(I) Digital Meter (+) → Terminal 18 (BR/BK) Digital Meter (–) → Battery (–) terminal
Ignition Switch OFF: 0 V
Ignition Switch ON: 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) Electronic Steering Damper Fuse 10 A (see Fuse Inspection in the Electrical System chapter) Power Source Wiring (see wiring diagram in this section)
If the fuse and wiring are good, replace the ESD ECU (see ESD (Electronic Steering Damper) ECU Removal/Installation in the Steering chapter).
ESD ECU Power Source Circuit

1. Ignition Switch
2. ESD ECU
3. Engine Ground
4. Battery
5. Starter Relay
6. Main Fuse 30 A
7. Frame Ground 3
8. Fuse Box 1
9. ESD Fuse 10 A
ESD Actuator Input Voltage InspectionExhaust Butterfly Valve Actuator Sensor Output Voltage Inspection
NOTE
Before this inspection, confirm the pulley is original
position (see Exhaust Butterfly Valve Actuator Installation).
Disconnect:
3 Pins Connector [A] (see Exhaust Butterfly Valve Actuator
Sensor Output Voltage Inspection)
2 Pins Connector [B]
Connect the harness adapter [A ...
Front Fork Assembly
Replace the following parts with new ones.
Slide Bushing
Guide Bushing
Oil Seal
Install the following parts to the inner tube [A].
Dust Seal [B]
Retaining Ring [C]
Apply grease to the oil seal lips.
Install the oil seal [A] so that the stamp side faces lower
side.
Insta ...
Air Intake Solenoid Valve Unit Test
Remove the air intake solenoid valve (see Air Intake Solenoid
Valve Removal in the Fuel System (DFI) chapter).
Set the hand tester [A] to the × 1 Ω range and connect it
to the air intake solenoid valve terminals as shown in the
figure.
Special Tool - Hand Tester: 57001-1394
...