Starting System 990 Supermoto - KTM 990 Adventure Repair Manual

antenna
immobilizer
ignition switch
2
5
-S1 -S2
C_BC/6 C_EL/2
C_AC/6 C_DV/2
1 3 5 2 4 6 1 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14
6
C_EF/14
-A1 alarm system dummy plug
C_EG/14

Starting system 990 Supermoto

NOTE: The starting system is equipped with security features.
The motorcycle can only be started under the following conditions:
– Ignition lock in the ON position
– Emergency-off switch in the ON position
– Transmission in the idle position or the clutch pulled
How the electric starter system operates:
The battery voltage flows from the battery to the fuse
the start auxiliary relay .
4
The coil of the auxiliary start relay is supplied with ground if at least one of the following conditions are met:
– Transmission in the idle position (neutral switch closed, current can flow via the diode and the neutral switch to chassis)
– clutch pulled (clutch switch closed, current can flow via the clutch switch to chassis)
NOTE: If these conditions are met, the load contact is closed by the coil ("clicks" once).
When the tip switch is actuated, battery voltage flows to the control unit of the alarm system (if present, otherwise via the
5
dummy connector ), to the closed load contact of the start auxiliary relay
6
to ground. The load contact of the starter relay is closed and battery voltage flows via the contact of the starter relay to the starter
motor .
8
If the clutch is released with the engine running and a gear engaged although the side stand is folded down (driving off with the
side stand folded down) the ECU will interrupt the ignition and injection and immediately cause the engine to stall.
The diode is a free wheeling diode; it is used to protect electronic components by reducing voltage peaks.
The light relay is used to interrupt the power supply to the lighting system during the start procedure to relieve the battery.
9
Components not named here, such as the neutral switch, clutch switch, etc., can be found in the wiring diagram of the engine
electronics in Chapter 13.
start/stop switch diode
3
-V1
C_AI/2
C_BK/4
1 2
C_BR/4
-X12
1 2 3 4
splice
175,143
-X12-P1
/3.B2
9 flaL-X200
/3.E6
7 flaR-X200
/3.E6
66 ALA-A1
/3.B2
2 1
C_BS/2
C_BV/2
Connector for
-S3
optional
alarm system seat
surveillance
1
-A2
Immobilizer
C_DN/8
starter
-X1 splice
C_DO/8
motor
1 2 3 4 5 6 7 8
-M1
8
1 1 1
1 -F5
-F1 -F6
10A
10A 10A
2 2 2
fuel-A2
/2.E5
lig-X19
fue-P1
/3.B2
4 2 1 3 4 2 1 3
C_EB/4 C_EB/4
3 2 1
C_AM/3
C_AR/3
M
-K2
-M2
fuel pump relay fuel light relay
pump
, ignition switch , emergency OFF switch
2
, to the coil of the starter relay
4
7
gn
start relay battery
-G1
30
-K1
A
M
C_AF/4
4 3 2 1
1
58
59 2
-A1-X5
/2.C1
-X2 splice
ACC
/3.B2
5,13,20,38,76,197,159
/3.A5
4 2 1 3 4 2 1 3
C_EB/4 C_EB/4
4
-K3 -K4 -K5
start auxillary
power relay
relay
, and finally to the coil of
3
7
7-9
regulator-rectifier
gn
-N1
gn
U
re-wh
re-wh
3
G
generator
GND-X14
/2.C1
STR-A3
/2.B5
, and from there