how to fix B1000 code in Toyota Highlander Fourth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative terminal of the battery to ensure safety.

2. Inspect and Repair Wiring

• Tools Required: Wire cutters, splices, electrical tape, multimeter
• Sub-steps:
  1. Visually inspect the wiring harness connected to the BCM for any signs of damage or fraying.
  2. Use a multimeter to test for continuity in the wires from the BCM to connected components.
  3. Repair or replace any damaged wires using splices and electrical tape.

3. Check and Replace BCM

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Remove any panels necessary to access the BCM.
  2. Disconnect the wiring harness from the BCM.
  3. Unbolt the BCM from its mounting location.
  4. Install the new BCM by reversing the removal process and torqueing the bolts to the manufacturer’s specifications.
  5. Reconnect the wiring harness securely.

4. Clear Codes and Test

• Tools Required: OBD-II scanner
• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the B1000 code.
  3. Start the vehicle and verify that the code does not return and that all related systems are functioning properly.