GTRLink

Current known issues with the G4X GTRLink Plug-In ECU:

·On some GTR and 4WD models a warning light may be displayed on the dash. This may be due to the value of the ECUs TPS Out signal level being too low. A solution to this is to slightly rotate the TPS to increase the closed throttle voltage. Remember to do a TPS cal after moving the TPS.

·TPS Idle Switch Powered From +5V. This is NOT an issue on manual transmission models. Some automatic transmission models require the TPS switch to be powered from 12V. This can be achieved by removing the wire from pin 57 (Idle Switch Power) and joining it to the wire from pin 59 (ECU Power).

·+5V Short – There has been a report of situation where the 5V supply was dragged down due to a short on the 5V supply. This was resolved by removing the wire from pin 57.

·Back Feeding on R34 – On R34 GTR models the A/C relay is hot fed. This will cause a back feed that will drain the battery. The power supply to the A/C relay must be changed to an ignition switched source or Aux 3 (pin 9) disconnected from the ECU. It is possible to use the power supply to the injector ballast resistors as the feed for the A/C relays coil.

·On some R34 GTRs the Air conditioning input (DI 4) may need to have its state changed to low side and pull-up resistor to on.

·On factory RB20DET Looms Injector 4 and 6 pins are swapped, this can be fixed by swapping their respective pins either at the ecu header or the injector sub loom connector.