Honda SH300 2006 Manual page 139

DTC 29-1 (IACV)
• Before starting the inspection, check for loose or
poor contact on the IACV 4P connector and
recheck the DTC.
1. Recheck DTC
Clear the DTC.
Start the engine and recheck the DTC.
Is the DTC 29-1 indicated?
YES – GO TO STEP 2.
NO – • Intermittent failure
• Loose or poor contact on the IACV
4P connector
2. IACV Short Circuit Inspection
Turn the ignition switch "OFF".
Disconnect the IACV 4P connector.
Check for continuity between the IACV 4P con-
nector of the wire harness side and ground.
Connection: Light green – Ground
Brown– Ground
Gray/Red – Ground
Black/Red – Ground
Are there continuities?
YES – • Short circuit in Light green or Brown
wire
• Short circuit in Gray/red or Black/Red
wire
NO – GO TO STEP 3.
3. IACV Circuit Continuity Inspection
Disconnect the ECM 33P connector.
Check the continuity between the ECM 33P con-
nector terminals and the IACV 4P connector ter-
minals of the wire harness side.
Connection: Light green – No. 21 (Light green)
Brown – No. 20 (Brown)
Gray/Red – No. 32 (Gray/Red)
Black/Red – No. 31 (Black/Red)
TOOL:
Test probe
Are there continuity?
YES – GO TO STEP 4.
NO – • Open circuit in Light green or Brown
wire
• Open circuit in Gray/red or Black/Red
wire
Lg
07ZAJ-RDJA110
4P CONNECTOR (Wire
side of female
terminals)
FUEL SYSTEM (PGM-FI)
4P CONNECTOR
4P CONNECTOR (Wire side of
female terminals)
Gr/R
Lg
Br
Bl/R
33P CONNECTOR
(Wire side of female
terminals)
Gr/R
Bl/R
Br
6-29