Description
This is a specialized utility from Codecard.lt designed to repair and synchronize the immobilizer data between the Central Electronic Module (CEM) and the Siemens SID803 Engine Control Unit (ECU). It is specifically for Volvo S40 (2004-2009), V50 (2004-2009), and C30 models. This tool is essential for solving common "no start" problems that arise when the synchronization between these two modules is lost.
The Problem This Tool Solves
• The most common problem on these cars is lost synchronization between the CEM and ECU, often occurring after a battery discharge.
• This results in a "no start" condition where the car does not start.
• The motor ECU will have an active fault code for "No communication with immobiliser".
How It Works
The software's core function is to transfer synchronization data from a CEM EEPROM dump file to a SID803 EEPROM dump file. A critical part of the process is that the SID803 ECU must also be synchronized with the vehicle's ABS computer ID. To use this tool, you must first read the memory chips from both modules using a compatible programmer.
• CEM Memory Types: 1K79X, 0L01Y, 1M84E
• ECU Type: SID803
• ECU Memory Chip: 95320 EEPROM
Simple Workflow
Remove the CEM and SID803 modules from the vehicle.
Read the memory from the CEM (e.g., with a CarProg A10 adapter) and read the 95320 EEPROM from the SID803.
Open both of the saved files in this utility.
Read the car's ABS ID using a separate diagnostic tool (like Launch X431 or Diagun) and write this ID into the "ABS ID" field in the software.
The tool will then allow you to transfer the sync data from the CEM to the SID803 data.
Save the modified SID803 file and write it back to the ECU's EEPROM chip. The car will now start.
System Compatibility
This software has been fully tested and is confirmed to be working perfectly on Windows 10 LTSC (2019).
Disclaimer
• Source of Files: All software and resources provided in this post have been collected from public, open-source domains on the internet.
• User Responsibility: This is a professional tool for expert use. You, the user, assume all responsibility and risk. The authors of this post and the forum administration are not liable for any damage to your equipment or data that may result from its use.
The Problem This Tool Solves
• The most common problem on these cars is lost synchronization between the CEM and ECU, often occurring after a battery discharge.
• This results in a "no start" condition where the car does not start.
• The motor ECU will have an active fault code for "No communication with immobiliser".
How It Works
The software's core function is to transfer synchronization data from a CEM EEPROM dump file to a SID803 EEPROM dump file. A critical part of the process is that the SID803 ECU must also be synchronized with the vehicle's ABS computer ID. To use this tool, you must first read the memory chips from both modules using a compatible programmer.
• CEM Memory Types: 1K79X, 0L01Y, 1M84E
• ECU Type: SID803
• ECU Memory Chip: 95320 EEPROM
Simple Workflow
Remove the CEM and SID803 modules from the vehicle.
Read the memory from the CEM (e.g., with a CarProg A10 adapter) and read the 95320 EEPROM from the SID803.
Open both of the saved files in this utility.
Read the car's ABS ID using a separate diagnostic tool (like Launch X431 or Diagun) and write this ID into the "ABS ID" field in the software.
The tool will then allow you to transfer the sync data from the CEM to the SID803 data.
Save the modified SID803 file and write it back to the ECU's EEPROM chip. The car will now start.
System Compatibility
This software has been fully tested and is confirmed to be working perfectly on Windows 10 LTSC (2019).
Disclaimer
• Source of Files: All software and resources provided in this post have been collected from public, open-source domains on the internet.
• User Responsibility: This is a professional tool for expert use. You, the user, assume all responsibility and risk. The authors of this post and the forum administration are not liable for any damage to your equipment or data that may result from its use.
