Never drop the ECU especially on a hard surface.
Such a shock to the ECU can damage it.
Front Fairing (see Front Fairing Removal in the Frame
Disconnect the ECU connector [D].
Installation is the reverse of removal.
Reset the throttle sensor position and idle speed control
valve actuator position (see How to Reset Throttle Sensor
Position and Idle Speed Control Valve Actuator Position).
ECU Power Supply Inspection
Remove the front fairing (see Front Fairing Removal in
the Frame chapter).
Visually inspect the ECU connectors.
If the connector is clogged with mud or dust, blow it off
with compressed air.
Remove the ECU (see ECU Removal).
Visually inspect the terminals [A] of the ECU and main
If the terminals of the ECU connector are damaged, re-
place the ECU.
If the terminals of the main harness connectors are dam-
aged, replace the main harness.
Turn the ignition switch off.
Disconnect the ECU connector [A].
Set a tester [B] and check the following wiring for conti-
ECU Grounding Continuity Inspection
(I) G/P leads (ECU terminal
9 [C] or 10 [D])
(II) Engine Ground
Both: about 0 Ω
If no continuity, check the connectors, the engine ground
lead, or main harness, and repair or replace them if nec-
FUEL SYSTEM (DFI) 3-69