Steve Bull Posted December 18, 2016 Report Share Posted December 18, 2016 The cam position sensors on my 1uzfe vvti aren't being picked up on my ECU. I have them wired from D1 and D2 on the ECU to sensor and then from the sensor to shielded earth. I notice the setting on the ECU that the pullup resister was off, on D1 and D2. Should this be on or should there be power going to the cam sensor. Thanks Quote Link to comment Share on other sites More sharing options...
Simon Posted December 18, 2016 Report Share Posted December 18, 2016 Hi SteveThe Di channels require a 1.5 volt signal to trigger. If at low RPM it could be that the voltage is too low.Are you looking at the F12 runtimes window on the VVT screen or at the DI status? Quote Link to comment Share on other sites More sharing options...
Steve Bull Posted December 19, 2016 Author Report Share Posted December 19, 2016 Yes the Digital window states both D1 and D2 VVT Cam Position OFF. The engine runs it just show the fault. On the Digital Inputs D1 and D2 on the ECU setting the pullup resister is off and that is normally when the sensor have a 5/8 or 14 volt input. I looked at the: Navigation: Wiring Information > Input Signal Wiring >Digital Input Wiring and it shows that the pullup resister should be "on" if the sensor is earthed. Or am i reading it wrong. Quote Link to comment Share on other sites More sharing options...
Scott Posted December 19, 2016 Report Share Posted December 19, 2016 Hi Steve,Have a check of the VVT tab of the runtime values window and see what the status of each cam is and what the reported position for each cam is.We have a 1UZ-FE VVT engine as a dyno test engine and on that we have the pullup resistors switched off and the active edge to falling.If you do the VVT Cam angle test do you get any results showing on the VVT tab of the Runtime Values Window?Scott Quote Link to comment Share on other sites More sharing options...
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