Description
Mercedes ISM Programming / Cloning Service – Intelligent Servo Module (FBS4)
Is your Mercedes Benz displaying an error message “Drive to the workshop without changing gear”? Then you have a faulty ISM/DSM.
Other symptoms include car not shifting gears between P, R, N, or D.
The Intelligent Servo Module’s (ISM) / Direct Servo Module’s (DSM) main purpose is to enable the system to read the selected drive position via electrical signals and to engage the drive position via a mechanical interface on the transmission. The Mercedes ISM/DSM system is located on the driver’s side on the transmission housing.
This service is suitable if you have any of the symptoms listed below:
- The vehicle hardly starts.
- The vehicle’s gear won’t shift.
- Revs at high rpm.
- The cluster light goes off.
- The vehicle won’t crank due to loss of communication from the Transmission Control Module.
- Error data from the actuator motor in the component A80 of the Intelligent Servo Module (ISM)
- Car shakes badly in idle.
Common fault codes are:
- 1904 The internal mechanism in component A80 for engaging select or lever position P is not in the correct position.
- 1974 Selector lever position P was engaged due to a fault occurring in component A80 (intelligent servo module for DIRECT SELECT) or in the vehicle communications
- 1922 System shut down due to an internal fault
- 1994 Component A80 (Intelligent Servo Module for Direct Select) is defective
Typical part numbers for FBS4 ISM/DSMs include but are not limited to:
- ISM
- Intelligent Servo Module
- DSM
- Direct Servo Module
- A0002703252
- A0002703352
- A0002703452
- A0002704252
- A0002704452
- A0002704652
Information that we need:
- Part number of your unit
- Short description of the problem
- Diagnostic report or diagnostic error/trouble codes with transcriptions of the errors
According to your diagnostic error/trouble codes, we will decide where and what the problem is and advise how to proceed.
If you are unsure that you have an FBS4 ISM/DSM, please send us a photo of your ISM/DSM along with your vehicle registration/VIN and we can check for you.
How does this service work?
- You will need to send us your VIN and vehicle registration when placing your order.
- You will need to send us your original ISM/DSM for data extraction along with the replacement ISM/DSM with the same part number.
- This service usually takes 5 working days.
- Your ISM/DSM will need adaptations using a diagnostic tool such as Autel 908 / Launch Pro / Star Mercedes.
If you are experiencing any of the above-listed issues with your car, contact us and see how we can help.