what does the B1242 code mean for my Toyota Camry XV50 (2012-2017)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle battery to ensure safety.
• Allow the vehicle to cool down if recently driven.

2. Inspect Solar Sensor

• Remove any dashboard covers that obstruct access to the solar sensor.
• Carefully disconnect the wiring harness from the solar sensor.
• Visually inspect the sensor for any signs of damage or dirt accumulation.

3. Test the Solar Sensor

• Using a multimeter, set it to measure resistance.
• Connect the multimeter probes to the solar sensor terminals.
• Compare the resistance reading with the manufacturer's specifications (typically found in the repair manual).
• If the reading is out of range, replace the solar sensor.

4. Repair Wiring and Connections

• If any damaged wiring or connectors were found, repair or replace them as necessary.
• Ensure all connections are tight and free of corrosion.

5. Reassemble and Test

• Reconnect the solar sensor and any dashboard covers removed.
• Reconnect the vehicle battery.
• Start the vehicle and monitor the air conditioning system for proper operation.