norberteis4

4Runner rear window heating issue

Hi, I'm having a strange issue with my 2001 Toyota 4Runner diesel. The rear window heating isn't working. I've got an error stored, and the windshield heating doesn't seem to be performing as well as it used to. Could a heavily discharged or defective battery really be the culprit here? I've checked the heating coil, but I'm not sure what else to look for. Any ideas?

The main issue discussed is a malfunctioning rear window heating system in a 2001 Toyota 4Runner diesel. The problem might be linked to a heavily discharged or defective battery, as both the rear defroster and windshield heating systems are sensitive to voltage fluctuations. A generic error code indicating a "rear window heating circuit malfunction" suggests that the battery or charging system could be the root cause. The recommended solution is to have a workshop diagnose the battery and charging system to resolve the issue.

Did this summary help you solve your problem?

4 comment(s)

I had a similar issue with my Toyota 4Runner. The rear defroster and windshield heating are often linked. If the error memory mentions low voltage, a failing battery could definitely be the reason. Have you checked the battery's voltage output? What does the error code say exactly?

Thanks for the quick reply! I haven't checked the voltage output directly, but the error code is fairly generic, something along the lines of 'rear window heating circuit malfunction'. It just seems odd that a battery issue could cause such a specific problem. Is it common for these systems to be that sensitive to voltage fluctuations?

Yes, these systems are often more sensitive than you might think. The rear defroster draws a significant amount of power, and if the battery isn't providing enough, it can trigger errors and prevent proper function. Given the vague error code and the windshield heating issue, I'd strongly suggest having a workshop properly diagnose the battery and charging system. It's the most likely culprit.

Okay, thanks for the advice. I'll take it to a workshop and have them check the battery and charging system. Hopefully, that will resolve the heating issue. I'll post what I find out.

rmh_community_comment_box_header

community_crosslink_scanner_headline

community_crosslink_scanner_intro

community_crosslink_scanner_title

community_crosslink_scanner_price

community_crosslink_rmh_headline

community_crosslink_rmh_intro

community_crosslink_rmh_title

community_crosslink_rmh_subtitle

community_crosslink_rmh_brand

TOYOTA

community_crosslink_rmh_model

4RUNNER