audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Idle Air Control Valve <--> [Idle Speed/Throttle Actuator - Electronic]|Specifications|Page 3152 > < Idle Air Control Valve <--> [Idle Speed/Throttle Actuator - Electronic]|Specifications|Page 3150
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Idle Air Control Valve: Testing and Inspection

Idle Air Control (IAC) valve.

NOTE:

For function testing of the idle air control valve, also see, On Board Diagnostic (OBD) "Read Measuring Value Block" function 08, display
groups 004 and/or 018. See: Computers and Control Systems/Testing and Inspection

Electrical check

Idle Air Control Valve Connection

-

Disconnect harness connector from IAC valve.

Idle Air Control Valve Testing

-

Measure resistance on IAC valve.
^

Specified value: 7-11 (ohms) 

If specified values are not obtained:

-

Replace IAC valve.

NOTE:

At room temperature, the resistance lies lower in the tolerance range; with the engine warmed to operating temperature, it is higher in the
tolerance range.

Mechanical check

-

Remove idle air control valve.

Idle Air Control Valve

-

Check rotary slide valve (arrow) for signs of scoring (by visual inspection).

CAUTION!

Idle Air Control Valve <--> [Idle Speed/Throttle Actuator - Electronic]|Specifications|Page 3152 > < Idle Air Control Valve <--> [Idle Speed/Throttle Actuator - Electronic]|Specifications|Page 3150