Honda CBR125R, Owner'S Manual

Page: 107 / 430

FUEL SYSTEM (PGM-FI)
5-15
SENSOR UNIT POWER LINE
INSPECTION
BEFORE DTC TROUBLRESHOOTING
• When the DTC displays 1-1, 1-2, 8-1, 8-2, 9-1 and
9-2, check the following before DTC trouble-
shooting.
• Before starting the inspection, check for loose or
poor contact on the sensor unit 5P connector and
ECM 33P connector.
1. Sensor Unit Power Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the sensor unit 5P connector.
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Measure the voltage at the wire side.
If the voltage within 4.75 – 5.25 V?
YES – Turn the ignition switch OFF. Connect
the sensor unit 5P connector and start
the DTC troubleshooting (page 5-17).
NO – GO TO STEP 2.
2. Sensor Unit Input Voltage Line Short Circuit
Inspection
Turn the ignition switch OFF.
Check for continuity between the sensor unit 5P
connector of the wire side and ground.
Is there continuity?
YES – Short circuit in White/red wire
NO – GO TO STEP 3.
3. Sensor Unit Power Line Open Circuit Inspection
Disconnect the ECM 33P connector.
Check for continuities at the White/red and
Green/orange wires between the sensor unit 5P
and ECM 33P connectors.
Is there continuity?
YES – Replace the ECM with a known good
one, and recheck.
NO – • Open circuit in White/red wire
• Open circuit in Green/orange wire
Connection: White/red (+) – Green/orange (–)
Standard:
4.75 – 5.25 V
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
W/R G/O
Connection: White/red – Ground
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminal)
W/R
Connection: 6 (Yellow/red) – White/red
4 (Green/orange) – Green/orange
TOOL:
Test probe
07ZAJ-RDJA110
(4)
(6)
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
ECM 33P CONNECTOR
(Wire side/female terminals)
G/O
W/R