Suzuki DL650K5 Service Manual page 407

MALFUNCTION
DETECTED ITEM
CODE
Secondary throttle
valve actuator
C28
Secondary throttle
position sensor
C29
Gear position signal
C31
Fuel injector #1/#2
C32/C33
Fuel pump relay
C41
Ignition switch
C42
Heated oxygen sensor
(HO2S)
[E-02, 19]
C44
PAIR control solenoid
C49
valve
DETECTED FAILURE CONDITION
When no actuator control signal is supplied from the ECM or
communication signal does not reach ECM or operation voltage
does not reach STVA motor, C28 is indicated. STVA can not
operate.
STVA lead wire/coupler.
The sensor should produce following voltage.
0.1 V sensor voltage
Without the above range for 4 sec. and more, C29 is indicated.
Secondary throttle position sensor, lead wire/coupler connec-
tion.
It judges from gear position voltage, engine speed and throttle
position by ECM, when the gear position voltage is 0.2 V and
less.
Gear position sensor, wiring/coupler connection. Gearshift cam
etc.
When fuel injector voltage gets 1.3 V and less, C32 or C33 is
indicated.
Injector, wiring/coupler connection, power supply to the injector.
No voltage is applied to the both injectors #1/#2 for 3 sec. after
the contact of fuel pump relay is turned ON. Or voltage is
applied to the both injectors #1/#2, when the contact of fuel
pump is OFF.
Fuel pump relay, connecting lead wire, power source to fuel
pump relay, fuel injectors.
Ignition switch signal is not input in ECM.
Ignition switch, lead wire/coupler.
The sensor voltage should be the following and less after warm-
ing up condition.
(Sensor voltage 0.4 V)
Without the above value, C44 is indicated.
Heater operation voltage does not reach in the oxygen heater
circuit, C44 in indicated.
The Heater can not operate.
HO2S lead wire/coupler connection.
Battery voltage supply to the HO2S.
PAIR control solenoid valve voltage is not input in ECM.
PAIR control solenoid valve, lead wire/coupler.
SERVICING INFORMATION
CHECK FOR
4.8 V
9-3