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Hi All,
As per my intro post I'm getting a Tiguan 162 in early January and this forum has been a wealth of information, particularly Golf R exhaust and IS38 swaps!
First mod will be fitting a Golf R exhaust with OEM-like control of the valves. Not keen on the clunky AWE or Varex solutions that use wired or Bluetooth remotes. On my current car I've made an Arduino-based device ($15 worth of parts) that uses an MCP2515 CAN bus receiver that controls the exhaust valves via PWM. Valve position (0%-50%-100%) is based on drive mode selection signals sniffed from the CAN bus. Hoping this is doable for the Tiguan with Golf R exhaust valves, as the wiring diagrams for the Tiguan and Golf R look very similar.
My plan:
1. Determine if OEM opening/closing is possible. Need to hook my scope up to pin 58 of the main 94 pin connector (T94) to confirm if the ECU (J623) in the Tiguan communicates with the exhaust valves (J883 and J945) as it would in a Golf R. If not, determine if this is something that can be enabled in a custom tune.
2. Get hold of an OEM Golf R exhaust control valve and figure out the PWM voltage, frequency and duty cycle required to open and close the valves. I've got the schematic and can see the +5v, +12v and data lines.
3. If point 1 above turns out impossible, capture a suitable CAN bus command (such as selecting Sport, or Individual DCC settings) and then send the PWM open/close commands to the valves accordingly. Not a bad outcome for minimal spend and decent integration.
Sorry for the long winded post, but I'd be very keen to know if anyone has looked into this further and can share results/issues. This forum has been a great source of info so I'm keen to give back where I can. Cheers.
As per my intro post I'm getting a Tiguan 162 in early January and this forum has been a wealth of information, particularly Golf R exhaust and IS38 swaps!
First mod will be fitting a Golf R exhaust with OEM-like control of the valves. Not keen on the clunky AWE or Varex solutions that use wired or Bluetooth remotes. On my current car I've made an Arduino-based device ($15 worth of parts) that uses an MCP2515 CAN bus receiver that controls the exhaust valves via PWM. Valve position (0%-50%-100%) is based on drive mode selection signals sniffed from the CAN bus. Hoping this is doable for the Tiguan with Golf R exhaust valves, as the wiring diagrams for the Tiguan and Golf R look very similar.
My plan:
1. Determine if OEM opening/closing is possible. Need to hook my scope up to pin 58 of the main 94 pin connector (T94) to confirm if the ECU (J623) in the Tiguan communicates with the exhaust valves (J883 and J945) as it would in a Golf R. If not, determine if this is something that can be enabled in a custom tune.
2. Get hold of an OEM Golf R exhaust control valve and figure out the PWM voltage, frequency and duty cycle required to open and close the valves. I've got the schematic and can see the +5v, +12v and data lines.
3. If point 1 above turns out impossible, capture a suitable CAN bus command (such as selecting Sport, or Individual DCC settings) and then send the PWM open/close commands to the valves accordingly. Not a bad outcome for minimal spend and decent integration.
Sorry for the long winded post, but I'd be very keen to know if anyone has looked into this further and can share results/issues. This forum has been a great source of info so I'm keen to give back where I can. Cheers.
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