what does the B1242 code mean for Toyota Tacoma N300 (2016-Present)

Solution

1. Preparation

• Gather tools and necessary parts.
• Ensure the vehicle is parked on a level surface and the engine is turned off.
• Disconnect the negative terminal of the battery for safety.

2. Inspect and Replace A/C Relay

• Locate the A/C relay in the fuse box (refer to the owner’s manual for exact location).
• Remove the relay by pulling it straight out of its socket.
• Check for any signs of corrosion or damage on the relay contacts.
• Replace with a new relay if faulty.

3. Check and Replace A/C Fuse

• Locate the A/C fuse in the fuse box.
• Remove the fuse using fuse pullers or needle-nose pliers.
• Inspect the fuse for continuity or any visible signs of failure.
• Replace with a new fuse of the same amperage if necessary.

4. Inspect Wiring and Connectors

• Visually inspect the wiring harness connected to the A/C system for any frays, cuts, or loose connections.
• Clean any corrosion from connectors using an electrical contact cleaner.
• Repair or replace damaged wiring as needed.

5. Test A/C Compressor Clutch

• Reconnect the battery and start the engine.
• Turn on the A/C and observe the compressor clutch for engagement.
• If the clutch does not engage, use a multimeter to check for voltage at the clutch connector while the A/C is on.
• If there is no voltage, trace back to the relay or control module for further diagnosis.