Honda CRF450R 2009 Service Manual page 159

After '09-
4. MAP Sensor Output Line Open Circuit
Inspection
Turn the "ECM" selector switch OFF.
Disconnect the ECM 33P (Black) connector.
Check for continuity al the light green/yellow wire
between the MAP sensor 3P (Black) connector and
ECM 33P (Black) connector.
Connection : 32 - Light green/yellow
TOOL:
Test probe , 2 pack 07ZAJ·RDJA 110
/s
there continuity?
YES - Replace the ECM with a known good one.
and recheck.
NO - Open circuit in light green/yellow wire
DTC 2-1 (MAP SENSOR)
1 .
MAP Sensor System Inspection
Connect Ihe battery harness and battery harness
adaptor (page 6-19).
Tum the "ECM" and "PUMP" selector switch ON .
Start the engine.
Check the MAP sensor with the MCS at idle speed.
Is the reading changed?
YES - Inlermittent failure
NO - GO TO STEP 2.
2. Manifold Absolute Pressure Test
Stop the engine.
Hang the fuel tank to the left side of the frame (page
4-6).
Remove the screw and stay.
Check for connection and installation of the MAP
sensor vacuum hose.
Is the MAP sensor vacuum hose connection
correct?
YES - GO TO STEP 3.
NO - Correct the hose inslallation .
3. MAP Sensor System Inspection
Replace the MAP sensor with a known good one
(page 6-70).
Slart the engine.
Check the MAP sensor with the MCS at idle speed.
Is the reading changed?
YES - Faulty original MAP sensor
NO - Replace the ECM with a known good one,
and recheck.
32
FUEL SYSTEM (PGM-FI)
3P(BLACK)CONNECTOR
(Wire side/female terminals)
LgN
L - -_ _ --{
Q
}---1
33P (BLACK) CONNECTOR
(Wire sidelfemale termlnats)
6-27