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michaelhunter49

Hilux low heating output

Hi, I have a 2006 Toyota Hilux with a diesel engine. Recently, the heating output has been too low, especially noticeable on colder days. I scanned for errors and found one stored. I suspect a defective water valve might be the cause. I checked the visible wiring and connectors, but everything seems to be in order. The mileage is 128232 km. Any ideas?

Summary of the thread

A 2006 Toyota Hilux with a diesel engine was experiencing low heating output, particularly on colder days. The initial suspicion was a defective water valve, despite visible wiring and connectors appearing intact. After further investigation and a workshop visit, it was confirmed that the issue was indeed a defective water valve with a faulty connector, which was repaired, resolving the heating problem.

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4 comment(s)

vincent_blade3

Valve blockage is possible, or the connection to the heater core. Have you checked the coolant level? Low coolant can cause poor heating. A defective thermostat could also be the culprit, preventing the engine from reaching optimal temperature.

michaelhunter49 (community.author)

Coolant level is fine, I already checked that. The thermostat seems okay too, the engine warms up normally. Could a faulty cable or plug connection to the water valve really cause this much trouble?

vincent_blade3

Yes, a bad connection can definitely cause the symptoms you described. A poor connection will affect the valve's operation. However, it's best to get it properly diagnosed. Take it to a workshop.

michaelhunter49 (community.author)

Okay, thanks for the advice. I took it to the workshop, and it turned out to be a defective water valve with a faulty connector, just as you suspected. The repair cost 95€, including parts and labor. Heating works perfectly now.

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TOYOTA

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HILUX