Suzuki Baleno Manual page 1431

DTC DETECTING CONDITION AND TROUBLE AREA (DTC P0505)
DTC DETECTING CONDITION
DTC will set when any one of the following conditions is
detected.
Engine idle speed is 100 r / min. or more lower than target idle
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speed for 10 sec. or more when vehicle stops and closed
throttle position (ON).
Engine idle speed is 200 r / min. or more higher than target idle
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speed for 10 sec. or more when vehicle stops and closed
throttle position (ON).
IAC valve terminal voltage is out of specification for about
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20 sec. or more.
(2 driving cycle detection logic)
DTC CONFIRMATION PROCEDURE
NOTE:
Check to make sure that the following conditions are satisfied when using this DTC CONFIRMATION PRO-
CEDURE.
Intake air temp.: –75C (17.45F) or higher
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Altitude (barometric pressure): 2400m, 8000 ft or less (560 mmHg 75 kPa or more)
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Transmission gear shift lever is shifted in "Neutral" for M/T (in "P" position for A/T)
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Electric load (lighting, heater blower, rear defogger, etc) and A/C are turned OFF.
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1) With ignition switch OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and warm up to normal operating temperature (805C – 1105C, 1765F – 2305F).
4) Run engine at idle speed (600 – 1000 r/min.) for 5 min. or more.
5) Check DTC and pending DTC.
ENGINE GENERAL INFORMATION AND DIAGNOSIS (J18 ENGINE WITH WU TWC) 6-2-83
TROUBLE AREA
Idle air control valve or its circuit
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Air intake system (clog, leakage or fast idle
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control system malfunction)
Vehicle speed sensor
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Engine mechanical
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Accessory engine load
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ECM
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