4Runner Windshield Washer Heater Fault

A faulty windshield washer heater on a 2000 4Runner? That's not something you hear about every day, but it could be a simple fix. Have you checked the cable and plug connection to the heater itself? A loose or corroded connection is a common cause for this type of malfunction.

Thanks! Where exactly is the windshield washer heater located? I'm not really sure where to look for the cable and plug.

Okay, on your 4Runner, the windshield washer heater is usually integrated with the washer fluid reservoir or located very close to the washer motor. Trace the wires coming from the washer nozzles back towards the reservoir; you should find the heater and its connections there. But honestly, with those symptoms and error codes, it might be more efficient to have a workshop take a look. They can diagnose it properly and replace any defective parts. It shouldn't be too expensive.

Thanks for the help! I took it to a shop, and you were right, it was a defective connection. Cost me 95€ to get it sorted.