Question about 2002 Volkswagen Jetta TDI

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How to test cooling fan control module vw jetta 2001

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The cooling fan module is located below the radiator over flow tank. The discharge from the overflow tank discharges hot collant directly onto the module. Every time mine stops working we take the two wiring harness plugs off and find coolant inside the plugs...(we had to use a set of brake spring plyers to get the large plug to snap back into place) I'm gonna move the cooling module and associated wires n plugs out from under the overflow tank - dry everything off (for the third time) and see if this solves the problem.

Posted on Aug 02, 2015

  • Alan Everett Aug 02, 2015

    The cooling fan module is located below the radiator over flow tank. The discharge from the overflow tank discharges hot collant directly onto the module. Every time mine stops working we take the two wiring harness plugs off and find coolant inside the plugs...(we had to use a set of brake spring plyers to get the large plug to snap back into place) I'm gonna move the cooling module and associated wires n plugs out from under the overflow tank - dry everything off (for the third time) and see if this solves ,the problem.

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motor1258
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SOURCE: 2005 vw jetta radiator cooling fan wont shut off

Check for a switch at lower part of rad. Should see a wire harness & plug on a sensor at bottom of rad. This sensor/switch also operates fan on/off according to coolant temperature. You may need to disconnect battery to get at it safely.

Posted on Jan 16, 2009

  • 534 Answers

SOURCE: I have a 2003 VW Jetta 1.8t that is overheating.

Assuming engine tune / mechanical condition is not the cause of the overheating:-
Ensure cooling fan is cutting in at the appropriate engine temperature - check operation of the fan controlling relay,
Ensure fan switching control temperature sensor is serviceable,
Ensure cooling system is filled properly, taking care to bleed out air where necessary,
Ensure coolant pressure cap is of correct rating and in serviceable condition,
Check coolant hose on suction side of waterpump is not softened and collapsing at engine revs above idle,
Ensure radiator core is not blocked or cooling airflow inhibited by insects etc.

Posted on Aug 11, 2009

  • 34 Answers

SOURCE: How to Check fan control module 2001 vw beetle?

Sounds like your fan speed switch. I had the same problem. The fan speed switch is the main power switch to your AC. VW only sells the whole cluster wholesale around 150.00. Let me know if you need instruction on removing cluster.

Posted on Oct 30, 2009

AutoDocP
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SOURCE: test radiator cooling fans

Hello,

they should come on at app. 90 deg. celsius (190 F) .

It is a common problem with the beetle, the cause is a malfunction in the cooling control module.

The module is surveilled by the on board diagnosis system, so you should bring the car to the shop and let them run some tests with the diagnosis computer.

Posted on Jun 26, 2010

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Test radiator cooling fans


Hello,

they should come on at app. 90 deg. celsius (190 F) .

It is a common problem with the beetle, the cause is a malfunction in the cooling control module.

The module is surveilled by the on board diagnosis system, so you should bring the car to the shop and let them run some tests with the diagnosis computer.

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