Suzuki VLR1800 Service Manual

Engine General Information and Diagnosis: 1A-68
DTC “C29” (P1654-H/L): Secondary Throttle Position Sensor (STPS) Circuit Malfunction
B822H11104019
Detected Condition and Possible Cause
Wiring Diagram
ECM coupler (Harness side)
Troubleshooting
CAUTION
!
When using the multi-circuit tester, do not strongly touch the terminal of the ECM coupler with a
needle pointed tester probe to prevent terminal damage.
NOTE
After repairing the trouble, clear the DTC using SDS tool. Refer to “Use of SDS Diagnosis Reset
Procedures (Page 1A-14)”.
Detected Condition Possible Cause
C29
Output voltage is not within the following
range.
Difference between actual throttle opening
and opening calculated by ECM is larger
than specified value.
0.15 V ≤ Sensor voltage < 4.85 V
• STP sensor maladjusted.
• STP sensor circuit open or short.
• STP sensor malfunction.
• ECM malfunction.
• STP sensor circuit shorted to VCC or ground circuit
open.
P1654
H
Sensor voltage is higher than specified
value.
L
Sensor voltage is lower than specified
value.
• STP sensor circuit open or shorted to ground or VCC
circuit open.
ECM
E2
VCC
Y/W
R
STPS
STP sensor
B/Br
11
20
29
I822H1110062-01
1 2 3 4 5 6 7 8 9 10 11121314151617
18
18
18 19 20 21 22 23 26 2724 25 28 29 30 31 32 33 34
35
36
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
53 54 55 56 57 58 59 60 61 62 63 6764 65 66 68
68
6852
52
52
I822H1110010-01

Suzuki VLR1800 Specifications

General

Brand	Suzuki
Model	VLR1800
Category	Motorcycle
Language	English