Dtc 29-1 (Iacv) - Honda TRX500FM Service Manual

PGM·FI SYSTEM
5. Fuel Injector Signal Line Short Circuit Inspection
Check for continuity between the wire harness side , - -- - - - - - - -- - - - - - --
fuel injector 2P (Gray) connector [1J terminal and Greenlblack
111
4-24
ground .
Connection: Green/black - Ground
Is
there continuity?
YES - Short circuit in the Green/black wire.
NO - Replace the PCM/ECM with a known good
one (page 4-34), and recheck.
DTC 29·1 (IACV)
Before starting the inspection, check for loose or
poor contact on the IACV 4P
(BlaCk)
connector and
PCMIECM 33P connectors , and recheck the
DIG.
1. Recheck DIG
Erase the DIG (page 4-12).
Start the engine and recheck the DIG with the HDS
pocket lester.
Is the
Dre
29-1 indicated?
YES - GO TO STEP 2 .
NO Intermittent failure .
• Loose or poor contact of the IACV 4P
(Black) connector.
2. IACV Short Circuit Inspection
Turn Ihe ignition switch OFF.
Disconnect the IACV 4P (Black) connector [1].
Check for continuity between the wire harness side
IACV 4P (Black) connector terminals and ground.
Connection: Yellow - Ground
Yellow/blue - Ground
Brownfy ellow - Ground
Yellowfgreen - Ground
/5
there continuity?
Yellow/blue
Yellow
YES - Short circuit in the Yellow or Yellow/ [11
green wire.
Short circuit in the Yellow/blue or
Brown/yellow wire .
NO - GO TO STEP 3.
Brown/yellow
Yellow/green