what does code B1200 mean on my Toyota Camry Eighth Generation (2018-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect the Battery and Connections

• Tools Required: Multimeter, socket set
• Verify the battery voltage; it should be around 12.6 volts when fully charged.
• Inspect the battery terminals for corrosion and ensure they are tight.
• Clean the terminals if corrosion is present.

3. Check Fuses

• Tools Required: Fuse puller or needle-nose pliers
• Locate the fuse box and identify the fuses related to the BCM (consult the owner’s manual for exact location).
• Pull each fuse and visually inspect for damage; replace any blown fuses with the same amperage rating.

4. Inspect Wiring and Ground Connections

• Tools Required: Visual inspection tools, possibly a wiring diagram
• Examine the wiring harness leading to the BCM for signs of wear, fraying, or damage.
• Check the grounding points for the BCM, ensuring they are clean and tight.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the vehicle and check if the B1200 code reappears using the OBD-II scanner.