Component Tests - KTM 990 Adventure Repair Manual

7-44

COMPONENT TESTS

NOTE:
– Before injection system components are replaced, insure that none
of the engine's mechanical components are defective.
– Check all fuses. Make sure the control unit is being supplied with
ground and positive voltage.
Fuel pump and pressure regulator
Checking the fuel presure
Switch on the ignition, the pump will run for 2 seconds or switch on
the pump with the KTM diagnostics tool. If not, perform the following
tests:
– Scan the fault memory with the KTM diagnostics tool.
– Check whether the fuel pump relay is functioning (see page 7-44).
– Check the ground and voltage on the fuel pump connector (AR4).
NOTE:
– If the fuel pump relay is not being controlled by the control unit,
check the crash switch (see page 7-46).
– The pressure should be 343 kPA (3.5 bar). If the pressure is lower,
check the voltage and ground on the fuel pump connector (AR4).
– If you cannot find a defect in the electric system, dismount the fuel
pump / pressure regulator unit.
Injection valves
(output)
The signal from the injection valves can be scanned with the KTM
diagnostics tool
Before replacing an injection valve, perform the following tests:
– Check the positive supply (orange cable) at the injection valve
connector (CL or CL1).
– Check the wiring and the connector for continuity to the control unit
(control unit disconnected).
– Measure the resistance at the respective injection valve.
Resistance of the injection valves at 20ºC: 11.7 Ω