TaskMule Posted August 24, 2012 Report Share Posted August 24, 2012 :tup: Quote Link to comment Share on other sites More sharing options...
washdup Posted September 19, 2012 Report Share Posted September 19, 2012 (edited) /// Edited September 23, 2012 by washdup Quote Link to comment Share on other sites More sharing options...
TaskMule Posted September 24, 2012 Report Share Posted September 24, 2012 ARD - Lucky, on 06 June 2012 - 09:51 PM, said: It's called a Zener diode. but easier to delete in the software And solder it where? I want THIS. Quote Link to comment Share on other sites More sharing options...
Roboticloner Posted September 25, 2012 Report Share Posted September 25, 2012 325 Miles and counting, no CEL and finally passed my emissions check. Thanks!!! Quote Link to comment Share on other sites More sharing options...
rgreen4 Posted October 23, 2012 Report Share Posted October 23, 2012 98 V70 t5 w/ 224k I've tried all the suggestions to delete the SAS P0410 soldered in the diode in the wire harness, and unplugged the air pump and I've replaced both o2 sensors and I'm still getting a P0410 code. I've left the solinoid and relay intact as suggested. I've got a NYS inspection due next month so any help would be greatly appreciated. Quote Link to comment Share on other sites More sharing options...
Volvo5.0 Posted October 23, 2012 Author Report Share Posted October 23, 2012 98 V70 t5 w/ 224k I've tried all the suggestions to delete the SAS P0410 soldered in the diode in the wire harness, and unplugged the air pump and I've replaced both o2 sensors and I'm still getting a P0410 code. I've left the solinoid and relay intact as suggested. I've got a NYS inspection due next month so any help would be greatly appreciated. Do you have any pictures of the diode soldered into the wiring harness? Diode pointing the right way? Tapped into the correct wires? Should look like this.... 1 Quote Link to comment Share on other sites More sharing options...
rgreen4 Posted October 26, 2012 Report Share Posted October 26, 2012 Yes mine does look like the Pic above, I even use the same color coded wires for for my diode to be sure that the wires were connected correcly and I tested the diode for current flow before soldering to be sure that it would go from 32 to 37. Quote Link to comment Share on other sites More sharing options...
erikv11 Posted October 27, 2012 Report Share Posted October 27, 2012 hmmmm did you check it after soldering? e.g. test resistance, you could have cooked the diode. Just something to consider. Quote Link to comment Share on other sites More sharing options...
rgreen4 Posted October 28, 2012 Report Share Posted October 28, 2012 What should the resistance be? Current flow should be from anode to cathode right. The diode from Radio Shack is so small (approx 1/8 ") that it was almost impossble to see any markings on it so before soldering I connected 1 wire which I thought was the anode side of the diode to a 1.5 volt AA battery then measured the voltage on the other side and got 1.0 volt then I soldered the wires to it and installed the diode. Quote Link to comment Share on other sites More sharing options...
Keaton85 Posted October 28, 2012 Report Share Posted October 28, 2012 Just got another diode and install it into the ECU. Then you know 100% that it's correct. In my opinion splicing into the wiring is just asking for trouble and requires twice as much work. Quote Link to comment Share on other sites More sharing options...
rgreen4 Posted October 29, 2012 Report Share Posted October 29, 2012 I just installed a second diode and P0410 comes right back up again are you sure that this works? Quote Link to comment Share on other sites More sharing options...
Keaton85 Posted October 29, 2012 Report Share Posted October 29, 2012 Works perfect. I've done it on about 6-7 vehicles with thousands of miles on all of the diode mods. All in te family, so I've been able to check codes. Did you put it in the ECU? Like I said forget the wiring! Quote Link to comment Share on other sites More sharing options...
rgreen4 Posted October 29, 2012 Report Share Posted October 29, 2012 No I didn't because it was mentioned earlier that installing it in the wire harness allows the mod to stay w/ the car in case the ecu was changed. I'll try the ecu mod next but I'll get new diode. Just to go over it again what is the proceedure for determining pin 32 and 37? Quote Link to comment Share on other sites More sharing options...
Fudge_Brownie Posted October 30, 2012 Report Share Posted October 30, 2012 If you unplug the solenoid over the radiator fan, it will throw a code immediately based on my experience. I have a resistor-soldered ECU and removed the pump without any codes. I later tried to remove the solenoid and got a 410 code immediately. Plugged it back in and I was fine. Your solenoid may be bad. Junkyard can fix that. Quote Link to comment Share on other sites More sharing options...
Keaton85 Posted October 30, 2012 Report Share Posted October 30, 2012 You can test the solenoid. If it has 30-40ohms or resistance it's fine. Also instead of getting another solenoid, just install a resistor of 30-35ohms in place of the solenoid. Quote Link to comment Share on other sites More sharing options...
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