Honda CRF450R 2009 Service Manual page 206

FUEL SYSTEM (PGM-FI)
6-74
REMOVAUINSTALLATION
(AFTER ' 12)
Remove the regulator/rectifier (page 17-14).
Release the crankcase breather drain hose clamp from
the stay.
Remove the ECM from the ECM stay.
Disconnect the ECM 33P (Black) connector.
Installation is in the re'lerse order of removal.
POWER/GROUND LINE INSPECTION
NOT E:
Before starting the inspection . check the regulatorl
recUfier (page 17-14).
ENGINE DOES NOT START (MIL DOES NOT BLINK)
1. Engine Stop Switch Inspection
Inspect the engine stop switch (page 17-21 ).
Does the engine stop switch operate normally?
YES - GO TO STEP 2.
NO - Faulty engine stop switch
2. ECM Power Input Line Inspection
Disconnect the ECM 33P (Black) connector (page
6-73).
Check for continuity at the ECM 33P (Black)
connector terminals and ground .
Connection: 23 - Ground
TOOL:
Test probe, 2 pack
07ZAJ-RDJA 110
Is there continuity?
YES -
Short circuit in Black wire
NO - GO TO STEP 3.
3. ECM Ground Line Inspection
Check for continuity between the ECM 33P (Black)
connector tenninals and ground.
Connection : 2 - Ground
('09 -
' 12 only)
TOOL:
6 - Ground
12 - Ground
Test probe, 2 pack
Is there continuity?
07ZAJ-RDJA 110
YES -
Replace the ECM with a known good one,
and recheck.
NO - Open circuit in Ground line
33P (BLACK) CONNECTOR
(Wire sideJfemale terminals)
\
6
33P (BLACK) CONNECTOR
(Wire sidelfemale terminals)
23
2 ('09 - '12
only)
12