Honda CRF450R 2009 Service Manual page 158

FUEL SYSTEM (PGM·FI)
6·26
5. MAP Sensor Inspection
Connect the ECM 33P (Black) connector.
Replace the MAP sensor with a known good one
(page
6-70).
Erase the OTG's (page 6-23).
Tum the "ECM" selector switch ON.
Check the MAP sensor with the
MeS.
Is ore 1-1
indicated?
YES - Replace the ECM with a known good one,
and recheck.
NO - Faulty original MAP sensor
DTC 1·2 (MAP SENSOR HIGH
VOLTAGE)
Before starting the inspection. check for loose or poor
contact on the MAP sensor 3P (Black) connector and
ECM 33P connector, then recheck the DIG.
1. MAP Sensor System Inspection 1
Connect the 12 V battery ("ECM" selector switch is
ON).
- '09:
page
6-19
- After '09: page 6-19
Check the MAP sensor with the MeS.
Is about 5 V Indicated?
YES - GO TO STEP 2.
NO - Intermittent
failure
2. MAP Sensor System Inspection 2
Turn the "ECM" selector switch OFF.
Disconnect the MAP sensor 3P (Black) connector.
Connect the MAP sensor 3P (Black) connector
terminals at the wire side with a jumper wire.
Connection: Light greenfyellow - Green/red
Turn the "ECM" selector switch ON.
Check the MAP sensor with the MCS.
Is about 0 V indicated?
YES - Faulty MAP sensor
NO - GO TO STEP 3.
3. MAP Sensor Input Voltage Inspection
Turn the "ECM" selector switch OFF .
Remove the jumper wire.
Tum the "ECM" selector switch ON.
Measure the voltage at the wire side.
Connection: Red/yellow (+) - Green/red
H
15 th e voltage within 4. 75 - 5.25 V?
YES - GO TO STEP 4.
NO - ' Open circuit in Red/yellow wire
• Open circuit in Green/red wire
3P(BLACK)CONNECTOR
(Wire sldelfema\e terminals)
G/R
3P (BLACK) CON NECTOR
(Wire sideffemale terminals)
G/R
e
LOIV
JUMPER WIRE