14" (P0120-H/L) Tp Sensor Circuit Malfunction - Suzuki RM-Z250 Service Manual

"14" (P0120-H/L) TP SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
Output voltage is not within the following
range.
Difference between actual throttle open-
14
ing and opening calculated by ECM is
larger than specified value.
0.39 V
Sensor voltage is higher than specified
H
value.
P0120
Sensor voltage is lower than specified
L
value.
TP sensor

When using the multi circuit tester, do not strongly touch the terminal of the ECM coupler with
a needle-pointed tester probe to prevent the terminal damage or terminal bend.
NOTE:
After repairing the trouble, clear the DTC using SDS tool. (12-21)
INSPECTION
Step 1 (When indicating 14:)
1) Stop the engine.
2) Check the TP sensor coupler 1 for loose or poor contacts.
If OK, then measure the TP sensor input voltage.
3) Disconnect the TP sensor coupler 1.
4) Connect a 12 volts battery by using the battery lead wire to
the service coupler. (12-19)
Sensor voltage < 4.51 V
Bl
Y
B
POSSIBLE CAUSE
• TP sensor maladjusted.
• TP sensor circuit open or short.
• TP sensor malfunction.
• ECM malfunction.
• TP sensor circuit shorted to VCC or ground circuit
open.
• TP sensor circuit open or shorted to ground or
VCC circuit open.
R/Bl
Y
B/Br
1
FI SYSTEM DIAGNOSIS 12-31
ECM
VCC
TP
E2