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 Ford Focus Mk1 Siemens VDO 1S7T-15K600-FD 5WK48730F
Vendors's code: 5WK48730F
Product code: CA1B-1439D
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Comfort Control Module Ford Focus Mk1 Siemens VDO 1S7T-15K600-FD 5WK48730F
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Comfort module 1S7T-15K600-FD – does it fit your Ford Focus?
This is a used, working comfort control module made by Siemens VDO, Ford number 1S7T-15K600-FD, Siemens VDO number 5WK48730F. The module comes from a Ford Focus Mk1. Before buying, compare the numbers with the label on the module in your car.
Comfort Control Module Ford Focus Mk1 Siemens VDO 1S7T-15K600-FD
The comfort control module operates the central locking and the alarm – it receives commands from the remote key and switches and controls the door locks and the alarm signalling. This Siemens VDO module was fitted to the Ford Focus Mk1.
Part numbers to compare
- 1S7T15K600FD – Ford number, on the label: 1S7T-15K600-FD
- 5WK48730F – Siemens VDO number, on the label: 5WK4 8730F
You will find both numbers on the label on the module housing. Choose the part by the full Ford number – several versions of comfort modules with different number suffixes were fitted to the Ford Focus.
Symptoms of a faulty comfort module
When the comfort module starts to fail, the most common symptoms are:
- the central locking does not respond to the remote or the button,
- only some of the doors lock or unlock,
- the alarm goes off for no reason or cannot be armed,
- no communication with the module during diagnostics.
Before replacing it, check the fuses, power supply, earth connection and connectors of the module, and read the fault codes with a diagnostic tool – a damaged wiring harness in the doors causes similar symptoms. After replacement, the module may need to be coded with a diagnostic tool and the remote keys programmed.
Frequently asked questions
| Which car does the comfort module 1S7T-15K600-FD fit? |
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| This module comes from a Ford Focus Mk1. Match it by the Ford number 1S7T-15K600-FD – compare it with the label on the module in your car. |
| Which number is the Ford number and which is the Siemens VDO number? |
| 1S7T-15K600-FD is the Ford number, and 5WK4 8730F (written without spaces as 5WK48730F) is the Siemens VDO manufacturer number. |
| Does the module need coding after fitting? |
| The module may need to be coded with a diagnostic tool, and the remote keys may need to be programmed again – this depends on the version and equipment of the car. |
| What condition is this module in? |
| It is a used part in good working condition. The warranty period is shown in the product specification table. |
Not sure whether this module fits your car? Send us a photo of the label on your old module and we will check compatibility.
