- Sun Mar 12, 2023 12:55 pm
#61799
I have just picked up a UA4C, the pin out for the 22-pin plug is here
Something daft is confusing me...the wiring for the IAT and CLT sensors. Taking the CLT as an example the UA4C pin out states:
• pin 3 : "Coolant temperature sensor 0-5v return (2 wire sensor also fed 5v)"
• pin 8 : "5v for sensor reference (IAT, CLT, TPS)"
For my build the IAT and CLT are simple two wire sensors, I had expected to put one wire to sensor ground and the other to the ECU to read the resistance change, as per the Speeduino analogue sensor wiring schematic
The UA4C pinout indicates that I should instead connect one CLT wire to the 5v reference via pin 8 and connect the other to pin 3 - am I reading that correctly?
Something daft is confusing me...the wiring for the IAT and CLT sensors. Taking the CLT as an example the UA4C pin out states:
• pin 3 : "Coolant temperature sensor 0-5v return (2 wire sensor also fed 5v)"
• pin 8 : "5v for sensor reference (IAT, CLT, TPS)"
For my build the IAT and CLT are simple two wire sensors, I had expected to put one wire to sensor ground and the other to the ECU to read the resistance change, as per the Speeduino analogue sensor wiring schematic
The UA4C pinout indicates that I should instead connect one CLT wire to the 5v reference via pin 8 and connect the other to pin 3 - am I reading that correctly?