How do you check IAC voltage?
Here is how to test and clean the valve:
- 1) Open the hood of your vehicle.
- 2) Pull the electrical plug off the control valve.
- 3) Take out the idle control valve and flip it over.
- 4) Take your voltmeter and set it to “Ohms.”
How to test a Mercedes-Benz idle control valve?
Plug on couple at idle speed adjuster in a manner that voltage can be measured on plug. Engine at idle. If a faulty control unit is found, nowhere within the Mercedes Manual does it suggest this method but others have suggested this and it worked for me. Remove the control unit cover and lightly twisting from side to side while engine is running.
Is the idle speed adjustable on the Mercedes 116 / 117?
The 116/117 does not have an adjustable idle control. Each component within the system that make up the idle control must be functioning properly. Unless your vehicle was retrofitted with the old idle adjustment valve and ICV removed (pre-84), idle speed cannot be adjusted, only affected by failed componenets.
Can a car idle speed be adjusted without an ICV?
Unless your vehicle was retrofitted with the old idle adjustment valve and ICV removed (pre-84), idle speed cannot be adjusted, only affected by failed componenets. Here are the tests quoted from the MB sevice manual.
When to remove the air idle control valve?
When your engine is warm and at idle, remove the connector at the ICV and the idle should increase. Plug it back in and it should go back to 700-750 if everything is good.
Plug on couple at idle speed adjuster in a manner that voltage can be measured on plug. Engine at idle. If a faulty control unit is found, nowhere within the Mercedes Manual does it suggest this method but others have suggested this and it worked for me. Remove the control unit cover and lightly twisting from side to side while engine is running.
The 116/117 does not have an adjustable idle control. Each component within the system that make up the idle control must be functioning properly. Unless your vehicle was retrofitted with the old idle adjustment valve and ICV removed (pre-84), idle speed cannot be adjusted, only affected by failed componenets.
When your engine is warm and at idle, remove the connector at the ICV and the idle should increase. Plug it back in and it should go back to 700-750 if everything is good.
Unless your vehicle was retrofitted with the old idle adjustment valve and ICV removed (pre-84), idle speed cannot be adjusted, only affected by failed componenets. Here are the tests quoted from the MB sevice manual.