Suzuki VLR1800 Service Manual

1A-73 Engine General Information and Diagnosis:
1 6) Disconnect the ECM coupler. Refer to “ECM Removal
and Installation in Section 1C (Page 1C-1)”.
7) Check the continuity between the Y/W wire “A” and
terminal “20”.
Also, check the continuity between the R wire “C” and
terminal “11”.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
(B): 09900–25009 (Needle pointed probe set)
Tester knob indication
Continuity ( )
ECM couplers (Harness side)
Is the continuity OK?
Go to Step 2. R or Y/W wire open, or
Y/W wire shorted to
ground.
2 1) Connect the ECM coupler.
2) Turn the ignition switch ON.
3) Measure the input voltage between the R wire “C” and
ground.
Also, measure the input voltage between the R wire “C”
and B/Br wire “B”.
Special tool
(A): 09900–25008 (Multi-circuit tester set)
Tester knob indication
Voltage ( )
STP sensor input voltage
4.5 – 5.5 V
((+) terminal: R – (–) terminal: Ground, (+) terminal: R
– (–) terminal: B/Br)
Is the voltage OK?
Go to Step 3. Open or short circuit in
the R or B/Br wire.
Step Action Yes No
“C”
“A”
(Black)
(Gray)
(A)
(B)
“20”
“11”
I822H1110070-02
“C”
“B”
(A)
I822H1110071-01

Suzuki VLR1800 Specifications

General

Manufacturer	Suzuki
Model	VLR1800
Compression Ratio	10.5:1
Fuel System	Fuel injection
Starter	Electric
Transmission	5-speed
Category	Cruiser
Displacement	1783 cc
Ignition	Electronic ignition (Transistorized)
Final Drive	Shaft
Front Suspension	Telescopic, coil spring, oil damped
Rear Suspension	Link type, coil spring, oil damped
Rear Brakes	Single disc
Ground Clearance	140 mm
Seat Height	705 mm