Subuhrue Posted December 25, 2018 Share Posted December 25, 2018 (edited) Are there any relays for the electronic throttle body in the 2008 Outback 2.5i non turbo? Getting code P2101 even after replacing my throttle body assembly (which has the TPS fastened to it.) Edited December 27, 2018 by Subuhrue Quote Link to comment Share on other sites More sharing options...
3Pin Posted December 27, 2018 Share Posted December 27, 2018 Why are you asking? Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 27, 2018 Share Posted December 27, 2018 Yes. Quote Link to comment Share on other sites More sharing options...
Subuhrue Posted December 27, 2018 Author Share Posted December 27, 2018 12 hours ago, 3Pin said: Why are you asking? I am having a complex issue and have done a bit of testing up to this point. Basically when I start my car I have code P2101, at first I thought my throttle body (the actuators in it) were dead so I replaced my throttle body assembly, but to no avail. I did another test and started the car again, but this time unplugged the TPS while the car was running. Zero change at all. This leads me to believe faulty wiring to the connector. But when I first made this post I was thinking it could be a relay feeding the TPS causing a short or something similar. Upon measuring the reference voltage wire on the TPS connector I got +7V instead of +5V... very odd. Anyone have ideas? I do know that my accelerator pedal is working because when I plugged in my diagnostic program the sensor read the pedal change, and if I put the pedal to the floor the motor will accelerate slowly. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 27, 2018 Share Posted December 27, 2018 We had a similar problem with a 2006-ish WRX. Ended up being one of the throttle body relays had no supply power and the fault was somewhere behind the dash inside the harness. I traced the power to a plug at the driver's side of the dash, but where the wire came out to the relay on the passenger side it had no power. According to the schematic there were no other connections in-between. Customer did not want to pay for a dash pull so I stole power from the other throttle body relay (same fused circuit), and jumped it over to the dead plug. Solved the immediate problem. Car has never been back that was maybe a couple years ago. May not be your problem but I have seen it. GD Quote Link to comment Share on other sites More sharing options...
Subuhrue Posted December 27, 2018 Author Share Posted December 27, 2018 5 minutes ago, GeneralDisorder said: We had a similar problem with a 2006-ish WRX. Ended up being one of the throttle body relays had no supply power and the fault was somewhere behind the dash inside the harness. I traced the power to a plug at the driver's side of the dash, but where the wire came out to the relay on the passenger side it had no power. According to the schematic there were no other connections in-between. Customer did not want to pay for a dash pull so I stole power from the other throttle body relay (same fused circuit), and jumped it over to the dead plug. Solved the immediate problem. Car has never been back that was maybe a couple years ago. May not be your problem but I have seen it. GD Thanks for the info GD! Do the throttle bodies around these years have their own dedicated relays or do they use the MAIN relays on the diagrams? So far looking through the service manuals I haven't found any information pointing towards a dedicated relay for the throttle body, but there are also a lot of diagrams to read, no doubt I could have missed something! Still a bit tripped out that I got +7V on the reference voltage wire... but I am going to put that thought to the side right now and keep looking for areas of concern. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 27, 2018 Share Posted December 27, 2018 High voltage from a reference like that usually indicates a bad ground for the ECU's voltage divider. Check grounds for the ECU. There are dedicated relays for the throttle motor, yes. On the WRX they were in the passenger kick panel. GD Quote Link to comment Share on other sites More sharing options...
Subuhrue Posted December 27, 2018 Author Share Posted December 27, 2018 1 minute ago, GeneralDisorder said: High voltage from a reference like that usually indicates a bad ground for the ECU's voltage divider. Check grounds for the ECU. There are dedicated relays for the throttle motor, yes. On the WRX they were in the passenger kick panel. GD Good to know! I just started working on cars a year ago so my knowledge of all this is minimal and growing every day. The electrical side of cars is insane! I will report back with today's findings Quote Link to comment Share on other sites More sharing options...
Subuhrue Posted December 27, 2018 Author Share Posted December 27, 2018 How does one access these two relays?!?! This is madness haha Quote Link to comment Share on other sites More sharing options...
Subuhrue Posted December 29, 2018 Author Share Posted December 29, 2018 Case solved. It was the electronic throttle control relay. The car ran for about ten minutes and then I gave it the throttle and the motor died on me. Assuming it's the spark plugs or fuel filter. This car sat for years at an auction yard. Quote Link to comment Share on other sites More sharing options...
GeneralDisorder Posted December 29, 2018 Share Posted December 29, 2018 Flood damage? GD Quote Link to comment Share on other sites More sharing options...
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