Introduction
The fuel pump, injectors and ignition coils are all powered via the injection relay. The relay also sends voltage to the engine control unit, which enables activation of the relay itself.
Component assembling position
A injection relay; b etv relay (throttle valve actuator motor), c radiator fan relay, d engine control unit.
Connection wiring diagram
Ccm engine control connection, t injection relay. 85 Brown/black - bn/bk injection relay activation, 87 brown/white-bn/w ecu input voltage, u direct power to injectors, ignition coils and fuel pump, r battery power (+30), 30 and 86 brown - bn.
In the event of fault
In the event of an injection relay fault, the engine stops (if running) or will not start. The relay is not commanded by the ecu.
Fault codes generated and possible correlated faults
Fault codes generated by the engine control unit and displayed by the dds (fuel injection relay diagnosis):
Note
Check integrity of electric circuit - short-circuit to vdc = with dashboard on, using a voltmeter, a voltage is measured between the wire tested and ground.
Check integrity of electric circuit - short-circuit to ground = with the battery cables disconnected, using an ohmmeter, continuity is detected between the wire tested and ground.
Check integrity of electric circuit - open circuit = with the battery cables disconnected, using an ohmmeter, no continuity is detected between the two ends of the wire tested.
The dashboard service display shows the error "fuel injection" and the eobd warning light activates.
Possible correlated faults: the engine stops (if running) or will not start. Check:
Using the dds, activate the ignition coils, the fuel pump or the injectors. The injection relay is driven and its contacts (pin 87 and pin 30) should close.
If none of the aforementioned tests identify the problem and the relay is in proper working order, replace the engine control unit.
Component replacement methods
No special measures are necessary in order to replace the injection relay.
Residual range indication when the service is due
After resetting the first oil service warning (triggered at
1000 km), upon every key-on the system displays the
indication of which type of service should be performed next
(oil service or desmo service) and the residual range.
A (green) warning (1, fig. 32) Is activated for 2 seconds on
ever ...
Refitting the front brake master cylinder
Insert the front brake master cylinder unit (1) on the right side of the
handlebar to bring the terminal internal edge in
correspondence to the bolted joints (a).
Fit the terminal (12) on the handlebar inserting the screws (15).
Tighten the terminal (12) retaining screws to a torque of 10 ...
Ground connection locations
The negative cable, which is normally connected to the negative pole of the
battery, is fastened to the crankcase. From here, the cable
branches off and splits up within the electrical system to carry the ground
connection to the different elements in the system.
The image shows the ground ...