Suzuki VLR1800, Service Manual

Page: 93 / 624

Engine General Information and Diagnosis: 1A-24
Visual Inspection
Prior to diagnosis using the mode select switch or SDS, perform the following visual inspections. The reason for visual
inspection is that mechanical failures (such as oil leakage) cannot be displayed on the screen with the use of mode
select switch or SDS.
• Engine oil level and leakage. Refer to “Engine Oil and Filter Replacement in Section 0B (Page 0B-11)”.
• Engine coolant level and leakage. Refer to “Cooling Circuit Inspection in Section 1F (Page 1F-4)”.
• Fuel level and leakage. Refer to “Fuel Line Inspection in Section 0B (Page 0B-11)”.
• Clogged air cleaner element. Refer to “Air Cleaner Element Inspection and Cleaning in Section 0B (Page 0B-3)”.
• Battery condition.
• Throttle cable play. Refer to “Throttle Cable Play Inspection and Adjustment in Section 0B (Page 0B-14)”.
• Vacuum hose looseness, bend and disconnection.
• Broken fuse.
• FI indicator light operation. Refer to “Combination Meter Inspection in Section 9C (Page 9C-3)”.
• Each warning indicator light operation. Refer to “Combination Meter Inspection in Section 9C (Page 9C-3)”.
• Speedometer operation. Refer to “Speedometer Inspection in Section 9C (Page 9C-6)”.
• Exhaust gas leakage and noise. Refer to “Exhaust System Inspection in Section 1K (Page 1K-12)”.
• Each coupler disconnection.
• Clogged radiator fins. Refer to “Radiator Inspection and Cleaning in Section 1F (Page 1F-5)”.
Malfunction Code and Defective Condition Table
B822H11104009
Malfunction
Code
Detected Item Detected Failure Condition Check For
C00 NO FAULT — —
C12
CKP sensor
The signal does not reach ECM for 3 sec. or
more, after receiving the starter signal.
CKP sensor wiring and
mechanical parts
CKP sensor, lead wire/coupler
connection
P0335
C13/C17
IAP sensor
The sensor should produce following voltage.
0.5 V
≤
Sensor voltage < 4.85 V
In other than the above range, C13 (P0170) or
C17 (P0105) is indicated.
IAP sensor, lead wire/coupler
connection
P1750/
P0105
H Sensor voltage is higher than specified value.
IAP sensor circuit shorted to
VCC or ground circuit open
L Sensor voltage is lower than specified value.
IAP sensor circuit open or
shorted to ground or VCC
circuit open
C14
TP sensor
The sensor should produce following voltage.
0.2 V
≤
Sensor voltage < 4.8 V
In other than the above range, C14 (P0120) is
indicated.
TP sensor, lead wire/coupler
connection
P0120
H Sensor voltage is higher than specified value.
TP sensor circuit shorted to
VCC or ground circuit open
L Sensor voltage is lower than specified value.
TP sensor circuit open or
shorted to ground or VCC
circuit open
C15
ECT sensor
The sensor voltage should be the following.
0.15 V
≤
Sensor voltage < 4.85 V
In other than the above range, C15 (P0115) is
indicated.
ECT sensor, lead wire/coupler
connection
P0115
H Sensor voltage is higher than specified value.
ECT sensor circuit open or
ground circuit open
L Sensor voltage is lower than specified value.
ECT sensor circuit shorted to
ground