Suzuki DL1000 Service Manual

4-44 FI SYSTEM
“C29” STP SENSOR CIRCUIT MALFUNCTION
INSPECTION
DETECTED CONDITION POSSIBLE CAUSE
Signal voltage low or high.
Difference between actual throttle opening and
opening calculated by ECM in larger than specified
value.
• STP sensor maladjusted.
• STP sensor circuit open or short.
• STP sensor malfunction.
• ECM malfunction.
( )
0.10 V Sensor voltage
4.80 V
<
without the above range.
• Remove the fuel tank and air cleaner box. ( : 4-52 and -60)
1
2
Ye s
No
No
Reset the STP sensor
position correctly.
( : 4-68)
Replace the STP sensor
with a new one.
Turn the ignition switch OFF.
Check the STP sensor coupler for loose or poor contacts.
If OK, then measure the STP sensor input voltage.
Disconnect the STP sensor coupler.
Turn the ignition switch ON.
Measure the voltage at the Red wire and ground.
If OK, then measure the voltage at the Red wire and B/Br
wire.
; STP sensor input voltage: 4.5 – 5.5 V
+ Red – - Ground
+ Red – - B/Br
z 09900-25008: Multi circuit tester
u Tester knob indication: Voltage ( - )
Turn the ignition switch OFF.
Disconnect the STP sensor coupler.
Check the continuity between T
3 terminal wire and ground.
; STP sensor continuity: ∞Ω (Infinity)
(T
3 terminal – Ground)
; STP sensor resistance
Secondary throttle valve is closed : Approx. 1.1 kΩ
Secondary throttle valve is opened: Approx. 4.3 kΩ
z 09900-25008: Multi circuit tester

t Tester knob indication: Resistance (Ω)
If OK, then measure the STP sensor resistance at the
coupler (between T
3 and T4 terminals).
Close and open the secondary throttle valve by finger, and
measure the valve closing and opening resistance.
( )
Loose or poor contacts on
the ECM coupler.
Open or short circuit in the
Red wire or B/Br wire.
V
Red
B/Br
Ground
Ω
Ground
T3
Ω
T3
T4
1
2
2

Suzuki DL1000 Specifications

General

Brand	Suzuki
Model	DL1000
Category	Motorcycle
Language	English