Special Tool - Hand Tester: 57001-1394
Exhaust Butterfly Valve Actuator Resistance
Connections: P lead ←→ GY lead
Standard: 5 
200 Ω (for reference)
If the reading is 0 or infinity (∞) Ω, replace the exhaust butterfly valve actuator.
If the reading is in specification, remove the ECU and check the wiring for continuity between main harness connectors.
Disconnect the ECU and actuator connectors.
Wiring Inspection ECU Connector [A] ←→ Exhaust Butterfly Valve Actuator Connector [B] W/R lead (ECU terminal 45) [C] W/BL lead (ECU terminal 46) [D]
If the wiring is good, check the ECU for its ground and power supply (see ECU Power Supply Inspection in the Fuel System (DFI) chapter).
If the ground and power supply are good, replace the ECU (see ECU Removal/Installation in the Fuel System (DFI) chapter).
Exhaust Butterfly Valve Actuator Circuit
1. ECU
2. Exhaust Butterfly Valve Actuator
Exhaust Butterfly Valve Actuator Inspection
Air Switching Valve (Service Code 64)Pressure Testing
Remove:
Upper Fairing Assembly (see Upper Fairing Assembly
Removal in the Frame chapter)
Radiator Cap [A]
Remove the radiator cap in two steps. First turn the cap
counterclockwise to the first stop. Then push and turn it
further in the same direction and remove the cap.
Install the ...
Rear Caliper Removal
Remove:
Bolt [A]
Rear Wheel Rotation Sensor [B]
Loosen the banjo bolt [C] at the brake hose lower end,
and tighten it loosely.
Loosen the caliper holder pin [D].
Remove the rear wheel (see Rear Wheel Removal in the
Wheels/Tires chapter).
Unscrew the banjo bolt and remove t ...
Charging Voltage Inspection
Check the battery condition (see Charging Condition Inspection).
Warm up the engine to obtain actual alternator operating
conditions.
Remove the front seat (see Front Seat Removal in the
Frame chapter).
Check that the ignition switch is turned off, and connect
the hand tester [A] to t ...