Rogue Tuning - New Product: A new DME!
10-09-2014, 02:14 PM
#227
Can anyone go into more detail with these three switches and what is actually happening when you flip the switches? I get the map switch, either the stock map sensing or rogues external one. Not sure what the other 2( middle and left in pic) are doing when flipped
Attachment 876299
Attachment 876299
Last edited by mahoney944; 03-22-2015 at 02:28 PM.
10-09-2014, 02:32 PM
#228
The left one looks like it's a switch between "WBO2 External" and "Altitude Compensation". (Just a guess...) Does the Rogue DME have direct inputs for a WBO2?
What's it say along side the middle switch? Pic is blurry.
What's it say along side the middle switch? Pic is blurry.
10-09-2014, 02:37 PM
#229
Idk its a pic zoomed in from his site, I don't have one to look at. I thought altitude compensation was removed from the DME all together
10-09-2014, 02:58 PM
#230
From his site:
What about the other three switches? For those running Rogue Tuning software, these switches configure the operation of the rear-port.
This plug allows a clean and easy way of connecting a MAP sensor, and/or Wide-Band O2 sensor to the DME - without cutting the factory wiring harness!
This plug allows a clean and easy way of connecting a MAP sensor, and/or Wide-Band O2 sensor to the DME - without cutting the factory wiring harness!
10-09-2014, 03:38 PM
#231
10-09-2014, 10:01 PM
#232
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Not often I'm accused of that 
The Altitude compensation hardware is still there... Remember the ECU is designed to be 100% backwards compatible.
The switch on the right selects the MAP sensor input (either system connector or external plug).
The middle switch enables the altitude circuit bias or not (a weak DC voltage pull-up resistor).
The left switch selects between altitude input or WBO2 input on the external plug.
The Altitude compensation hardware is still there... Remember the ECU is designed to be 100% backwards compatible.
The switch on the right selects the MAP sensor input (either system connector or external plug).
The middle switch enables the altitude circuit bias or not (a weak DC voltage pull-up resistor).
The left switch selects between altitude input or WBO2 input on the external plug.
10-10-2014, 08:29 AM
#233
Not often I'm accused of that
The Altitude compensation hardware is still there... Remember the ECU is designed to be 100% backwards compatible.
The switch on the right selects the MAP sensor input (either system connector or external plug).
The middle switch enables the altitude circuit bias or not (a weak DC voltage pull-up resistor).
The left switch selects between altitude input or WBO2 input on the external plug.
10-10-2014, 10:48 PM
#235
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So if you disabled the middle switch, you are basically bypassing the altitude compensation switch, and remaining in an open circuit/ loop? Would this also disable the input on the left switch if the middle is disabled? Also is the wideband input a narrowband simulation(0 to 1v) from wideband or true wideband input (0 to 5v)
The left switch simply selects the input either from the system connector (altitude sensor), or the external plug (expecting WBO2).
The WBO2 input expects a true 0-5 volt signal.
10-10-2014, 10:49 PM
#236
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10-11-2014, 01:25 PM
#237
Disabling the middle switch only disables the pull-up resistor (circuit biasing)... It means that input would be left floating, and could switch between "on" and "off" for the altitude compensation.
The left switch simply selects the input either from the system connector (altitude sensor), or the external plug (expecting WBO2).
The WBO2 input expects a true 0-5 volt signal.
If above is true then if its enabled bypassing the altitude sensor, what good would any input be from the left switch?
10-11-2014, 04:30 PM
#238
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The altitude sensor is just a pressure controlled switch, and has two positions either open or closed. In order to tell if the switch is closed, the DME/ECU needs to apply a voltage to the circuit (via the pull-up resistor), to read if the switch is open or closed.
If the altitude switch is open, then the circuit will remain high (+5v), because the applied voltage doesn't have where to go.
If the altitude switch is closed, then the circuit will be low (+0v), as the switch simply grounds the circuit.
This operation is 100% necessary for cars that still utilize the altitude sensor.
The left switch is simply the selection choice between the system connector and the new expansion plug.
Let say I wanted to hook a WBO2 up, then I would attach the WBO2 0-5 volt analog output to whichever wire dictated by that switch.
Now, if we didn't have the middle switch to turn off the pull-up resistor, it would also be applying +5volts to that wire. This would typically cause the WBO2 0-5 v output to skew towards +5volts... The end effect is that the WBO2 does not read correctly - obviously not what we want.
All the ECU's switches are necessary in order to be as configurable as possible.
10-12-2014, 11:49 AM
#239
No.
The altitude sensor is just a pressure controlled switch, and has two positions either open or closed. In order to tell if the switch is closed, the DME/ECU needs to apply a voltage to the circuit (via the pull-up resistor), to read if the switch is open or closed.
If the altitude switch is open, then the circuit will remain high (+5v), because the applied voltage doesn't have where to go.
If the altitude switch is closed, then the circuit will be low (+0v), as the switch simply grounds the circuit.
This operation is 100% necessary for cars that still utilize the altitude sensor.
The left switch is simply the selection choice between the system connector and the new expansion plug.
Let say I wanted to hook a WBO2 up, then I would attach the WBO2 0-5 volt analog output to whichever wire dictated by that switch.
Now, if we didn't have the middle switch to turn off the pull-up resistor, it would also be applying +5volts to that wire. This would typically cause the WBO2 0-5 v output to skew towards +5volts... The end effect is that the WBO2 does not read correctly - obviously not what we want.
All the ECU's switches are necessary in order to be as configurable as possible.