Honda CBR125R, Owner'S Manual

Page: 116 / 430

FUEL SYSTEM (PGM-FI)
5-24
4. IAT Sensor Voltage Input Line Short Circuit
Inspection
Check for continuity between the sensor unit 5P
connector of the wire side and ground.
Is there continuity?
YES – Short circuit in Gray/blue wire
NO – Replace the ECM with a known good
one, and recheck.
DTC 9-2 (IAT SENSOR HIGH VOLTAGE)
1. IAT Sensor System Inspection
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the IAT sensor with the HDS pocket tester.
Is about 5 V indicated?
YES – GO TO STEP 2.
NO – • Intermittent failure
• Loose or poor contact on the sensor
unit 5P connector
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.
3. IAT Sensor Inspection
Turn the ignition switch OFF.
Disconnect the sensor unit 5P connector.
Connect the IAT sensor terminals at the wire
side with a jumper wire.
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the IAT sensor with the HDS pocket tester.
Is about 0 V indicated?
YES – Faulty sensor unit (IAT sensor)
NO – GO TO STEP 4.
Connection: Gray/blue – Ground
Gr/Bu
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminal)
Connection: Gray/blue – Green/orange
JUMPER WIRE
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminals)
Gr/Bu
G/O