how to fix B1342 code in Toyota RAV4 Fourth Generation (2013-2018)

Solution

1. Preparation

• Gather necessary tools and equipment.
• Disconnect the negative battery terminal to prevent electrical shock.
• Ensure the vehicle is parked on a level surface with the engine off.

2. Inspect and Replace A/C Fuses and Relays

• Locate the fuse box under the dashboard or engine compartment.
• Check the A/C fuses for continuity using a multimeter.
  • Replace any blown fuses with the appropriate amperage.
• Test the A/C relay by swapping it with a similar functioning relay in the fuse box.
  • If the A/C works after the swap, replace the faulty relay.

3. Check A/C Refrigerant Level

• Connect a manifold gauge set to the A/C service ports.
• Check the low and high-pressure readings and compare them with manufacturer specifications.
• If refrigerant is low, recover the old refrigerant and recharge the system with the correct type and amount of refrigerant.

4. Inspect A/C Amplifier and Wiring

• Remove the protective cover from the A/C amplifier.
• Visually inspect the A/C amplifier and its connectors for damage, corrosion, or loose connections.
• Clean any corrosion and ensure all connectors are secure.
• If the amplifier is damaged, replace it with a new unit.

5. Test A/C Compressor

• Reconnect the negative battery terminal.
• Start the engine and set the A/C to the maximum setting.
• Use a multimeter to measure voltage at the compressor connector; it should be within the specified range.
• If there is no voltage, trace back the wiring to locate any breaks or shorts.
• If voltage is present but the compressor does not engage, the compressor may need to be replaced.