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Old 06-12-2022, 05:28 AM   #4
stidnam
 
Drives: Starlet
Join Date: Nov 2017
Location: Australia
Posts: 177
There are options online to buy cables and procure the software. However, not legit. Alternatively you could find a friend who works for Toyota.

A factory gen 2 has the same fan setup as a gen 3 - it's got 2 relays and a resistor for running a High/Low setup. When the ECU triggers the first relay through the FAN pin, power is sent to a second 5 pin relay that, by default, routes the earth for the the fan via a resistor. This is Low mode. When the ECU triggers the FAN2 pin, it triggers the second relay to bypass the resistor.

Check if you have a FAN No 1 relay and FAN No 2 relay. I'd be surprised if you only have a single speed FAN. However, in saying that, I was surprised to hear they even made a 2nd gen Yaris without AC :|
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