The relay is like a switch. It turns on the main power when you turn the key or press start.
If the wiring and fuse box are fine, the BSI module itself may be failing to switch off the relay. According to, reprogramming the BSI with the correct VIN and ECU configuration is recommended. If the problem persists, the BSI may need to be replaced and matched to the vehicle. Conclusion a9b7 peugeot
Specialized electronics repair shops can rebuild the A9B7 unit. The relay is like a switch
Locate the white sticker on top of your current BSM box (e.g., 9667044880 ). Note the software tier classification, usually marked as R01, R02, R05, or R09 . According to, reprogramming the BSI with the correct
Use a Peugeot-specific diagnostic tool like to read live parameters. Check the status of the +APC ignition feed line. If the scanner shows +12V on the ignition circuit when the key is completely out of the ignition, a short is present.