Honda CBR125R Owner's Manual page 110

FUEL SYSTEM (PGM-FI)
4. MAP
Inspection
Turn the ignition switch OFF.
Check for continuity between the sensor unit 5P
connector of the wire side and ground.
Connection: Light green/yellow – ground
Is there continuity?
YES
NO
5. MAP Sensor Inspection
Replace the sensor unit with a known good one
(page 5-52).
Clear the DTC's (page 5-12).
Turn the ignition switch OFF.
Connect the sensor unit 5P connector.
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the MAP sensor with the HDS pocket
tester.
Is DTC 1-1 indicated?
YES
NO
DTC 1-2 (MAP SENSOR HIGH
VOLTAGE)
1. MAP Sensor System Inspection 1
Turn the ignition switch ON (and engine stop
switch " ": CM and U type).
Check the MAP sensor with the HDS pocket
tester.
Is about 5 V indicated?
YES
NO
2. Sensor Unit Power Line Inspection
Check the sensor unit power line inspection
(page 5-15).
Is the sensor unit power line normal?
YES
NO
5-18
Sensor Output Line
– Short circuit in Light green/yellow wire
– GO TO STEP 5.
– Replace the ECM with a known good
one, and recheck.
– Faulty original sensor unit (MAP sensor)
– GO TO STEP 2.
– • Intermittent failure
• Loose or poor contact on the sensor
unit 5P connector
– GO TO STEP 3.
– Replace or repair the abnormal circuit.
Short Circuit
SENSOR UNIT 5P CONNECTOR
(Wire side/female terminal)
Lg/Y