Force Fans On?
Discussion
Disconnecting the temp sensor will cause the ECU to take a default value of 97* as the water temp. This should be enough to test the fans but be aware of running for a prolonged period of time like this. Dan @ TaylorTVR advised me that it can cause start issues when cold as the ECU over-fuels.
Mine had a problem with the engine temp sensor causing erratic readout at the ECU. This caused the ECU to chatter the relay powering the fan(s). The PO experienced a dead fan as a result, but the place that replaced it doen't look for the root cause. I found all this out after experienced a dead relay.
I've replaced the engine temp sensor (and both relays) which has made things a lot happier, however I've also wired in an override switch by soldering feeds directly to the back of the ECU PCB. It was the simplest place to get that control without cutting into the loom or removing the ECU's inbuilt control.
I've replaced the engine temp sensor (and both relays) which has made things a lot happier, however I've also wired in an override switch by soldering feeds directly to the back of the ECU PCB. It was the simplest place to get that control without cutting into the loom or removing the ECU's inbuilt control.
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