Quote:
Originally Posted by parsonsj
Here's my question: can Dave or Mark or somebody post the pinouts for the ECM (E67) so I can add a - engine oil temp sensor, and
- GM A/C pressure sensor, and
- 2nd fan control wire.
Thanks!!
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Quote:
Originally Posted by parsonsj
More information about my harness: both high speed (pin 54/connector 1) and low speed (pin 49/connector 3) fan controls are connected to the same single fan relay.
The A/C sensor is not connected (pin 57/connector 3, I believe). I can't find any information about engine oil temp.
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LSA and LS9 engines utilize the I/O channel that is sometimes used for oil temperature for IAT2 (post intercooler Intake Air Temp). There are no additional I/O channels to take in engine oil temp on the supercharged engines.
A/C pressure sensor wiring is correct - and can be adjusted to fan driver output based on A/C head pressure. Remeber - highest requested fan driver percentage wins.
E67 controller has 3 fan output drivers - however, when used with PWM fan control, only one of those outputs is utilized. It provides a PWM output at frequency specific to the fan driver controller. I've not measured voltage based on PWM % output to determine what way the voltage goes based on desired output.
When fan drivers are used as discrete outputs, they can be used to close relays that can then be wired in parallel, series or parallel series combination to drive mutliple fans at low and high settings.
I'm a huge fan of PWM cooling fan control as I HATE listening to high speed fan during anything other than track situations that demand it. Nothing worse than pulling up and having the sweet rumble of an engine masked by a fan screaming away.