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techtalk:evo:elec01 [2019/06/17 18:40]
ixl2relax [Grounding is Critical]
techtalk:evo:elec01 [2019/11/11 06:17] (current)
ixl2relax [5 Volt Sensor Supply]
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 For example:​((sportsterdoc of the XLFORUM.net)) For example:​((sportsterdoc of the XLFORUM.net))
-|Blue wire was used for regular lighting power| +|Blue wire was used throughout ​for regular lighting power| 
-|Yellow wire was used for low beam headlight power| +|Yellow wire was used for low beam headlight power from the Hi/Lo Switch
-|White wire was used for high beam headlight power| +|White wire was used for high beam headlight power from the Hi/Lo Switch
-|Brown wire was used for the right turn signal power| +|Brown wire was used for the right turn signal power to the bulbs
-|Violet wire was used for the left turn signal power|  +|Violet wire was used for the left turn signal power to the bulbs|  
-|Orange or Orange/​White was used for Accessory power|+|Orange or Orange/​White was used throughout ​for Accessory power|
  
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 Be sure your multimeter BLACK Probe is properly grounded to the Battery Negative Post or to the frame. Be sure your multimeter BLACK Probe is properly grounded to the Battery Negative Post or to the frame.
  
 +Also see additional information on batteries [[techtalk:​ref:​elec03#​batteries|in the REF Section]].\\
  
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 IN EVERY CASE, the red lead is still on the positive battery terminal and the ground point you are testing should have a good connection back to the negative battery terminal through the ground connections of the wiring harness, the powertrain ground, the frame and the battery engine case ground point. If ANY GROUND POINT does not measure within .3v of the Reference Voltage, there is something loose, frayed, corroded or disconnected which causes the voltage loss. ((Contributed by IXL2Relax of the XLFORUM.net)) IN EVERY CASE, the red lead is still on the positive battery terminal and the ground point you are testing should have a good connection back to the negative battery terminal through the ground connections of the wiring harness, the powertrain ground, the frame and the battery engine case ground point. If ANY GROUND POINT does not measure within .3v of the Reference Voltage, there is something loose, frayed, corroded or disconnected which causes the voltage loss. ((Contributed by IXL2Relax of the XLFORUM.net))
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 +====== 5 Volt Sensor Supply ======
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 +Starting with the 1998 Sport model, the ICM/ECM has provided a +5v power output for various sensors. The MAP sensor seems to have been the first sensor that requires such a voltage.
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 +Below is a listing of where the +5v supply is connected for various years and various devices along with the listing of where the similar Sensor Ground wire connected. Notice that not all devices that were powered by the +5v supply used the specialized sensor ground connections.
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 +These connections do not have a history of failures, but if you problem symptoms on multiple sensors, be sure to trace out these lines (both supply & grounds) to eliminate them as a potential source of the issue.
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 +| **1998-2003 Sport Ignition Control Module**\\ \\ ICM GRAY Connector Pin 1 is +5v Output (RED/White Wire)\\ ICM GRAY Connector Pin 8 is Sensor Ground (BLACK/​White Wire)\\ \\ \\ \\ 1998-2003 models other than the Sport model\\ do not produce or utilize 5v power. | 1998-?\\ MAP Sensor Connector 80B - Pin 1 - 5v Sensor Power (R/W Wire)\\ MAP Sensor Connector 80B - Pin 3 - Sensor Ground (B/W Wire)\\ CAM Sensor Connector 14B - Pin A - 5v Sensor Power (R/W Wire)\\ CAM Sensor Connector 14B - Pin C - Sensor Ground (B/W Wire)\\ ​ \\ ?-2003\\ MAP Sensor Connector 80B - Pin C - 5v Sensor Power (R/W Wire)\\ MAP Sensor Connector 80B - Pin A - Sensor Ground (B/W Wire)\\ CAM Sensor Connector 14B - Pin A - 5v Sensor Power (R/W Wire)\\ CAM Sensor Connector 14B - Pin C - Sensor Ground (B/W Wire) |
 +| **2004-2006 Engine Control Module**\\ \\ ICM Connector Pin 3 is +5v Output (RED/White Wire)\\ ICM Connector Pin 4 is Sensor Ground (BLACK/​White Wire) | MAP Sensor Connector 80B - Pin C - 5v Sensor Power (R/W Wire)\\ MAP Sensor Connector 80B - Pin A - Sensor Ground (B/W Wire)\\ VSS - Vehicle Speed Sensor Connector 65B - Pin 1 - 5v Sensor Power (R/W to RED Wire)\\ VSS - Vehicle Speed Sensor Connector 65B - Pin 3 - Uses Powertrain Ground (BLACK Wire) |
 +| **2007-2013 Engine Control Module**\\ \\ ECM Connector Pin 14 is +5v Output (RED/White Wire)\\ ECM Connector Pin 26 is Sensor Ground (BLACK/​White Wire) | **5v power is fed from ECM Pin 14 to all of these connections:​**\\ VSS Connector 65B - Pin A (BLACK/Red Wire)\\ -- (VSS uses Powertrain Ground Point (BLACK Wire)- Not 5v Sensor Ground)\\ (2008-later)Jiffy Stand Connector 133B - Pin 1 (R/W Wire)\\ -- (JSS uses Powertrain Ground (BLACK Wire))\\ ---- (This connector on all models may have an issue due to its location)\\ Passes Thru Engine Harness Connector 145A/B - Pin 5 (R/W Wire)\\ TMAP Sensor Connector 80B - Pin C (or 3) (R/W Wire)\\ TPS Sensor Connector 88B - Pin B (R/W Wire)\\ \\ **The following devices are grounded thru the ECM on Pin 26:**\\ ETS - Engine Temp Sensor - Pin 2 (B/W Wire)\\ Front O2S - Oxygen Sensor - Pin 2 - (B/W Wire)\\ Rear O2S - Oxygen Sensor - Pin 2 - (B/W Wire)\\ Passes Thru Engine Harness Connector 145A/B - Pin 3 (B/W Wire)\\ TMAP - Temp/​Manifold Abs Pressure Sensor - Pin A (or 1) - (B/W Wire)\\ TPS - Throttle Position Sensor - Pin A - (B/W Wire)\\ \\ ECM Connector Pin 10 & 28 are Power Grounds - They go to the Powertrain Ground Point |
 +| **2014-later CANbus Engine Control Module**\\ \\ ECM Connector 2 - Pin 9 is +5v Output (RED/White Wire)\\ ECM Connector 2 - Pin 7 is 5v Sensor Ground (BLACK/​White Wire) | **5v power is fed from ECM Connector 2 - Pin 9 to all of these connections:​**\\ VSS Connector 65B - Pin A (R/W Wire)\\ -- (VSS uses Powertrain Ground Point (BK/GN Wire)- Not 5v Sensor Ground)\\ JSS - Jiffy Stand Sensor Connector 133B - Pin 1 (R/W Wire)\\ -- Uses Powertrain Ground (BK/GN Wire)\\ ---- (This connector on all models may have an issue due to its location)\\ Passes Thru Engine Harness Connector 145A/B - Pin 8 (R/W Wire) to:\\ TMAP Sensor Connector 80B - Pin 3 (R/W Wire)\\ TPS Sensor Connector 88B - (2014 its on Pin 1 (later years its on Pin B)(R/W Wire))\\ \\ **The following devices are grounded thru the ECM on Connector 2 - Pin 7:**\\ ETS - Engine Temp Sensor - Pin B (B/W to TAN Wire)\\ Front O2S - Oxygen Sensor - (138A/B)Pin 4 - (B/W  to BLACK Wire)\\ Rear O2S - Oxygen Sensor - (137A/B)Pin 4 - (B/W to BLACK Wire)\\ Passes Thru Engine Harness Connector 145A/B - Pin 6 (B/W Wire)\\ TMAP - Temp/​Manifold Abs Pressure Sensor - Pin 1 - (B/W Wire)\\ TPS - Throttle Position Sensor - (2014 its on Pin 2 (later years its on Pin A) (B/W Wire))\\ \\ ECM Connector 1 & Connector 2 - Pin 10 are both listed as Sensor Grounds (BK/GN)\\ ---- These are General Grounds - They go to the Powertrain Ground Point |
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