Power/Ground Line Inspection - Honda TRX500FM Service Manual

POWERIGROUND LINE INSPECTION
Before starting the inspection, check for loose or
poor contact on the PCMfECM 33P (Gray)
connector.
1. PCM/ECM Power Line Inspection
Turn the ignition switch OFF.
Disconnect the PCM/ECM 33P (Gray) connector (1).
Turn the ignition switch ON and engine stop switch
"0 ".
Measure the voltage between the wire harness side
PCM/ECM 33P (Gray ) connector terminal and
ground .
Connection: 81
(+) -
Ground
H
TOOL:
Test probe 07ZAJ·RDJA 110
Does the battery voltage exis t?
YES - GO TO STEP 2.
PGM·FI SYSTEM
81
NO Open circuit
In
the Black/red wire ' - - - _ _ _ _ __ _ _ _ _ _ _ _ _ _
.1
between the fuse box and PCM/ECM .
Open circuil in the Black wire between
the ignition switch and fuse box .
Blown IGN fuse (10A)
Inspecllhe ignition switch (page 22-11 ).
2. PCMIECM Ground Line Inspection
Turn the ignition switch OFF.
Check for continuity between the wire harness side
PCM/ECM 33P (Gray) connector [1J terminal and
ground .
Connection: 810 - Ground
B13 - Ground
821 - Ground
TOOL :
Test probe
Is there continuity?
07ZAJ·ROJA 110
YES - Replace the PCM/ECM with a known good
one (page 4·34), and recheck.
NO - Open circuil in the Green wire.
810 821 813
Q Q
4-35