A faulty transmission control module (TCM) most often causes limp mode with the gearbox stuck in one gear, harsh jolts when you select D or R, erratic gear changes, flashing PRND letters and a gearbox or engine warning light. However, the same symptoms are often caused by a low gearbox oil level, a weak battery, a poor earth or a faulty sensor. To test a transmission control module, start by checking the battery and reading the fault codes with a diagnostic tool that can talk to the gearbox control unit, then check the power supply, the connector, the oil and the live data. Below we explain the symptoms, the diagnostic steps and what the most common fault codes mean.
Comfort control module Volkswagen H52S2002 3C0937049AG
Vendors's code: H52S2002
Product code: AD10-87531
Barcode:
Code 39:
ISBN:
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Part number H52S2002 - is it the right choice?
Used, working part: comfort control module for Volkswagen - numbers H52/S2002 / H52S2002; 3C0 937 049 AG / 3C0937049AG. Before ordering, make sure the numbers match the label of your part.
Comfort control module Volkswagen
The comfort control module controls selected body consumers. The unit offered applies to: Volkswagen; it is used, working and in good condition.
When to replace the part
- the system returns to normal after the battery is disconnected,
- electrical faults appear after rain or a car wash,
- some functions work only intermittently,
- warning lights on the dashboard come on for no reason.
Before buying, make sure the cause is not the power supply or wiring, and only then replace the module.
Application according to the listing
- Volkswagen - model
Fitment
Number H52/S2002 also appears in another listing. Compare all numbers with the label on your part - we do not assume that listings are interchangeable.
What this part does
In many models the module communicates with other control units over the bus, so after replacement it may need coding or matching to the car. In VAG group cars the module is sometimes described as the onboard power supply control unit (Bordnetzsteuergerät); its version depends on the equipment.
Part numbers to check
- H52/S2002 / H52S2002 - part number
- 3C0 937 049 AG / 3C0937049AG - VAG group number (OEM)
Questions before buying
| Which number matters most when matching? |
|---|
| It is best to compare all numbers on the label, above all the one marked as the manufacturer or OEM number. |
| Is the part new? |
| It is a used, working part in good condition. Warranty details are listed in the offer features. |
| Is the part new? |
| This is a used, working part in good condition. You will find the warranty period in the product features table. |
Any doubts? Send a photo of your part to contact@auto24parts.com - we will check it for you.