Suzuki VLR1800, Service Manual

Page: 107 / 624

Engine General Information and Diagnosis: 1A-38
DTC “C14” (P0120-H/L): TP Sensor Circuit Malfunction
B822H11104012
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
C14
Output voltage is not within the following
range.
Difference between actual throttle opening
and opening calculated by ECM is larger
than specified value.
0.2 V
≤
Sensor voltage < 4.8 V
• TP sensor maladjusted.
• TP sensor circuit open or short.
• TP sensor malfunction.
• ECM malfunction.
P0120
H
Sensor voltage is higher than specified
value. • TP sensor circuit is shorted to VCC or ground circuit is
open.
L
Sensor voltage is lower than specified
value. • TP sensor circuit is open or shorted to ground or VCC
circuit is open.
ECM
R
B/Br
VCC
TPS
E2
P/B
TP sensor
11
8
29
I823H1110024-05
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I822H1110010-01