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What are the symptoms of a damaged BMW BDC module?

1 Answers

GrantFitz

07/25/25 6:13am

The symptoms of a damaged BMW BDC module include CAS system freeze and ignition failure. Below are the specific symptoms and solutions for a damaged BMW BDC module: Specific symptoms of a damaged BMW BDC module: CAS system freeze: During programming, the CAS system freezes, preventing the ignition switch from activating power to wake up other modules. Ignition failure: During normal operation, the ignition switch fails to turn on, making the vehicle unable to start. Solutions for a damaged BMW BDC module: For the E60 CAS control unit, manually connect pins 1 (KL30G), 8 (KL15), and 19 (15wup) to a 12V power source, then proceed with vehicle programming. For E65 and E66 models, manually connect pins 48 (15wup) and 49 (KL15) of the CAS control unit to a 12V power source, then perform vehicle programming. For newer E70 and E71 models, manually connect pins 1, 7, 8, 14, and 19 of the CAS to a 12V power source, then bridge pin 1 (empty) and pin 16 of the OBD-II port.

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