Honda SH125 Manual page 103

FUEL SYSTEM IProarammed Fuel Iniection)
DTC 7-2 (ECT SENSOR HIGH
VOLTAGE)
NOTE:
Before starting the troubleshooting, check the
ECT sensor 3P connector for loose contacts or
corroded terminals, and recheck the DTC.
1. ECT Sensor System Inspection
Turn the ignition switch to ON.
Check the ECT sensor with the HDS.
Is about 5 Vindicated?
NO
-
Loose or poorly connected ECT sen-
Temporarily failure; the system is
sor 3P connector.
normal.
YES
-
GO TO STEP 2.
2. ECT Sensor Inspection
Turn the ignition switch t o OFF.
Disconnect the ECT sensor 3P (gray) connector.
Connect the wire harness side connector termi-
nals with a jumper wire.
Connection: Pinklwhite
-
Greenlorange
Turn the ignition switch to ON.
Check the ECT sensor with the HDS.
Is
about 0 Vindicated?
YES
-
Faulty ECT sensor.
NO
-
GO TO STEP 3.
3. ECT Sensor Open Circuit Inspection
Turn the ignition switch to OFF.
Disconnect the jumper wire.
Disconnect the ECM 32P connector by releasing
the lock lever.
Check each wire for continuity between the wire
harness side ECM connector and ECT sensor
connector.
Connection: Pink/white
-
Pink/white
Greenlorange
-
Greenlorange
Is there continuity?
NO
-
Open circuit in PinWwhite or Green/
Orange wire.
Pinuwhite ECM 32P CONNECTOR
ECTSENSOR 3P
CONNECTOR
YES
-
Replace the throttle body/ECM assem-
I
bly with a new one, and inspect again.