KTM 990 Adventure Repair Manual page 188

7-50
Ignition coil
Defective ignition coils can be tested and controlled with the KTM
diagnostics tool. It allows you to establish which ignition coil is
affected. Both ignition coils must be dismounted but stay connected.
If an ignition coil breaks down, exchange the two and control again
with the KTM diagnostics tool - if the error is in the other position,
replace the affected ignition coil. If not, perform the following tests:
– Check the positive supply (ignition on, orange cable) at the ignition
coil connectors (AS or AS1).
– Check the wiring and the connectors for continuity to the control
unit (control unit disconnected), white/brown and white/violet
cables).
– Measure the resistance of the affected ignition coil:
(measured between the terminals): 1.0 - 1.6 Ω at 20ºC
(measured between one terminal and the spark plug connector):
Fuel pump relay
1
The fuel pump relay
diagnostics tool.
If the fuel pump is not running, disconnect the control unit and apply
the ground to Pin 2 on the wiring harness connector CO (blue/green
cable). Switch on the ignition, the fuel pump relay should switch (click
once) and the fuel pump should keep running. If not, perform the
following tests:
– Check the positive supply to the relay connector AF1 Pin 1
(yellow/black cable color) and Pin 2 (orange/white cable).
– Check the wiring from connector AF1 to the control unit.
NOTE:
– If the fuel pump relay switches when actuated as described above
but is not actuated by the control unit, check the crash switch - see
page 7-46.
– If the fuel pump relay switches but there is no positive voltage at the
connector AF1 Pin 3 (blue/black cable), replace the relay.
– The fuel pump relay is located on the instrument mount under the
headlight mask in the 990 Adventure model.
(output)
9.4 - 17.6 KΩ at 20ºC
(output)
can be tested and controlled with the KTM
1