Honda CBR125R Owner's Manual page 113

2. ECT Sensor Inspection
Turn the ignition switch OFF.
Disconnect the ECT sensor 3P connector.
Connect the ECT sensor 3P connector terminals
at the wire side with a jumper wire.
Connection: Yellow/blue – Green/orange
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the ECT sensor with the HDS pocket
tester.
Is about 0 V indicated?
YES – Inspect the ECT sensor (page 19-13).
NO – GO TO STEP 3.
3. ECT Sensor Open Circuit Inspection
Turn the ignition switch OFF.
Remove the jumper wire.
Disconnect the ECM 33P connector.
Check the continuities at the Yellow/blue and
Green/orange wires between the ECM 33P and
ECT sensor 3P connectors.
Connection: 24 (Yellow/blue) – Yellow/blue
4 (Green/orange) – Green/orange
TOOL:
Test probe
Is there continuity?
YES – Replace the ECM with new one, and
recheck.
NO – • Open circuit in Yellow/blue wire
• Open circuit in Green/orange wire
DTC 8-1 (TP SENSOR LOW VOLTAGE)
1. TP Sensor System Inspection
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the TP sensor with the HDS pocket tester
when the throttle fully closed.
Is about 0 V indicated?
YES – • Intermittent failure
• Loose or poor contact on the sensor
unit 5P connector
NO – GO TO STEP 2.
2. Sensor Unit Power Line Inspection
Check the sensor unit power line inspection
(page 5-15).
Is the sensor unit power line normal?
YES – GO TO STEP 3.
NO – Replace or repair the abnormal circuit.
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
JUMPER WIRE
ECT SENSOR 3P CONNECTOR
(Wire side/female terminals)
Y/Bu
07ZAJ-RDJA110
FUEL SYSTEM (PGM-FI)
Y/Bu
G/O
(4)
G/O
(24)
ECM 33P CONNECTOR
(Wire side/female terminals)
5-21