15" (P0115-H/L) Ect Sensor Circuit Malfunction - Suzuki RM-Z250 Service Manual

"15" (P0115-H/L) ECT SENSOR CIRCUIT MALFUNCTION

DETECTED CONDITION
Output voltage is not within the following
15 range.
0.2 V Sensor voltage < 4.9 V
Sensor voltage is higher than specified
H
value.
P0115
Sensor voltage is lower than specified
L
value.
ECT 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 15:)
1) Stop the engine.
2) Check the ECT sensor coupler 1 for loose or poor contacts.
If OK, then measure the ECT sensor voltage at the wire side
coupler.
3) Disconnect the ECT sensor coupler 1.
4) Connect a 12 volts battery by using the battery lead wire to
the service coupler. (12-19)
POSSIBLE CAUSE
• ECT sensor circuit open or short.
• ECT sensor malfunction.
• ECM malfunction.
• ECT sensor circuit open or ground circuit open.
• ECT sensor circuit shorted to ground.
B/BI
B/Br
1
FI SYSTEM DIAGNOSIS 12-35
ECM
ECT
E2