Suzuki DL1000 Service Manual

4-40 FI SYSTEM
“C22” AP SENSOR CIRCUIT MALFUNCTION
INSPECTION
DETECTED CONDITION POSSIBLE CAUSE
Low pressure and low voltage.
High pressure and high voltage.
NOTE:
Note that atmospheric pressure caries depending
on weather conditions as well as altitude.
Take that into consideration when inspecting volt-
age.
• Clogged air passage with dust.
• Red wire circuit open or shorted to ground.
• B/Br or G/Y wire circuit shorted to ground.
• AP sensor malfunction.
• ECM malfunction.
()
0.10 V Sensor voltage
4.80 V
<
without the above range.
; AP sensor input voltage: 4.5 – 5.5 V
+ Red – - Ground
+ Red – - B/Br
z 09900-25008: Multi circuit tester
u Tester knob indication: Voltage ( - )
( )
• Remove the seat. ( : 6-4)
1
2
Ye s
Ye s
No
No
Loose or poor contacts on
the ECM coupler.
Open or short circuit in the
Red wire or B/Br wire.
; AP sensor output voltage: Approx. 4.0 V
at 760 mmHg (100 kPa)
( + G/Y – - B/Br)
z 09900-25008: Multi circuit tester
u Tester knob indication: Voltage ( - )
Check the air passage
for clogging.
Open or short circuit in the
G/Y wire.
Replace the AP sensor
with a new one.
Turn the ignition switch OFF.
Check the AP sensor coupler for loose or poor contacts.
If OK, then measure the AP sensor input voltage.
Disconnect the AP sensor coupler.
Turn the ignition switch ON.
Measure the voltage between Red wire and ground.
If OK, then measure the voltage between Red wire and
B/Br wire terminal.
Connect the AP sensor coupler.
Insert the copper wires to the lead wire coupler.
Turn the ignition switch ON.
Measure the AP sensor output voltage at the wire side
coupler between G/Y and B/Br wires.
Red
1
1
V
B/Br
G/Y
2
V
V

Suzuki DL1000 Specifications

General

Brand	Suzuki
Model	DL1000
Category	Motorcycle
Language	English