A: Yes, in most cases. The vehicle will remain driveable, but creature comforts (AC, windows, locks) may be intermittent.
Identify the specific output pin on the BSM harness corresponding to the main ignition positive power supply line.
Summary
: It allows for accurate ordering of touch-up pens and spray cans from official Peugeot parts channels . a9b7 peugeot
If hardware checks out, the BSI may have corrupted software. A Peugeot dealer or specialist with a full Diagbox license can perform a "Download" or "Configuration" procedure. This is essentially a firmware reflash.
Exterior
Electrical issues in French vehicles often follow predictable patterns due to component placement and environmental exposure. The root causes for this code generally fall into three categories: 1. Internal BSM Failure (Relay Corrosion) A: Yes, in most cases
When the A9B7 fault is active, you might experience the following symptoms:
If all else fails, the BSI itself is damaged (often water ingress). A new BSI from Peugeot costs ~$600. It must be (cleared of its VIN) and then programmed to your car. This is not a DIY job unless you have advanced CAN tools.
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When the connection between the driver IC and the glass panel degrades, the screen loses its ability to render the pixel matrix, resulting in the "White Screen" phenomenon.
Disconnect the vehicle battery. Unplug the main wiring harnesses (often color-coded black, grey, and brown) from the BSM. Inspect the pins closely using a flashlight. If you see green crust (copper oxidation) or moisture, you have found your problem. Clean the connectors thoroughly using a high-quality electronic contact cleaner and dry them completely. Step 3: Test the BSM Relay Box
Cons