Diagnosis And Service Procedures

WARNING: This page does not describe the selected car, but rather 151 other vehicles, including the 2006 BMW X5, 2006 BMW M3, 2006 BMW 330Ci, 2006 BMW 325Ci, and 2005 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

The control module performs a self test of the restraint system every time the ignition is switched on. Any faults with the system's inputs/outputs or processing capabilities will cause the fault lamp in the cluster to illuminate. The troubleshooting of the MRS system is fault driven and can be accessed using the DIS tester or MoDiC.

Installation of a replacement control module requires ZCS coding also using the MoDiC or DIS.

Fig 1: View Of DIS Tester

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When servicing or replacing any MRS components, always follow the precautionary measures outlined in the appropriate repair articles. This includes disconnecting the battery prior to any repair of maintenance work being performed.

Fig 2: Identifying MRS Removal Procedure

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All airbag units, including the ITS assemblies are part number specific by model. Always use the EPC to verify the correct part number for any component being replaced.

Fig 3: Using EPC To Verify Correct Part Number

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A replacement splice kit is available for the BST following an impact that causes BST activation. The splice kit comes complete with instructions for cutting and stripping the B+ cable for replacement. Follow the instruction completely to prevent future voltage drop problems in the B+ cable circuit.

Fig 4: Identifying Replacement Splice Kit

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