Suzuki SY413 Service Manual page 2692

DTC P0505 IDLE CONTROL SYSTEM MALFUNCTION
CIRCUIT DESCRIPTION
Relay box
Main fuse
DTC DETECTING CONDITION
D No closed signal to IAC valve is detected after engine
start.
: 2 driving cycle detection logic, continuous monitoring.
DTC CONFIRMATION PROCEDURE
1) Turn ignition switch OFF.
2) Clear DTC with ignition switch ON.
3) Start engine and run it at idle for 1 min.
4) Check DTC and pending DTC.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (G13/G16 ENGINE WITH WU TWC) 6-1-93
Main relay
IAC valve
To other valve
POSSIBLE CAUSE
D "R / B", "V / W" or "B" circuit open or short
D IAC valve malfunction
D ECM (PCM) malfunction
ECM
(PCM)