1. Check fuses: Make sure that the fuses related to the affected components (rear window heater, dash, door lock, wipers) are not blown. You can check the fuse box and replace any faulty fuses with ones of the same rating.
2. Immobilizer reset: Try performing an immobilizer reset to see if it resolves the issue. Typically, this involves turning the ignition on and off several times or following specific reset instructions as per the vehicle's user manual.
3. Electrical connections: Check the electrical connections related to the affected components to ensure they're secure and free of corrosion. Pay particular attention to the connections at the fuse box, relays, and any modules or control units involved in operating these systems.
4. CANBUS system: The issue might be related to a malfunction in the vehicle's Controller Area Network (CANBUS) system. This network is responsible for communication between different electronic modules. Check if there's any damage to the CANBUS wiring or connectors that might be causing disruptions.
5. Faulty modules or sensors: If the issue persists, it's possible that one or more of the modules or sensors controlling these components are faulty. Diagnosing this requires specialized automotive diagnostic tools and knowledge, so it's recommended to consult a qualified auto technician for further assistance.
6. Immobilizer Bypass: If the immobilizer is causing the issue and can't be reset, you might need to consult with an automotive professional to bypass the immobilizer, ensuring it doesn't interfere with the electrical systems of the vehicle.
