Honda CBR125R Owner's Manual page 114

FUEL SYSTEM (PGM-FI)
3. TP Sensor Output Line Short Circuit Inspection
Turn the ignition switch OFF.
Disconnect the sensor unit 5P connector.
Check for continuity between the sensor unit 5P
connector of the wire side and ground.
Connection: Yellow/black – Ground
Is there continuity?
YES
NO
4. TP Sensor Output Line Open Circuit Inspection
Disconnect the ECM 33P connector.
Check for continuity at the Yellow wire between
the sensor unit 5P and ECM 33P connectors.
Connection: 5 (Yellow/black) – Yellow/black
TOOL:
Test probe
Is there continuity?
YES
NO
5. TP Sensor Inspection
Replace the sensor unit with a known good one
(page 5-52).
Clear the DTC's (page 5-12).
Connect the sensor unit 5P and ECM 33P connec-
tors.
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the TP sensor with the HDS pocket tester.
Is DTC 8-1 indicated?
YES
NO
DTC 8-2 (TP SENSOR HIGH 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.
Is about 5 V indicated?
YES
NO
5-22
– Short circuit in Yellow/black wire
– GO TO STEP 4.
07ZAJ-RDJA110
– GO TO STEP 5.
– Open circuit in Yellow/black wire
– Replace the ECM with a known good
one, and recheck.
– Faulty original sensor unit (TP sensor)
– • Intermittent failure
• Loose or poor contact on the sensor
unit 5P connector
– GO TO STEP 2.
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminal)
Y/Bl
ECM 33P CONNECTOR
(Wire side/female terminal)
Y/Bl
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminal)
(5)