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techtalk:evo:engctl03 [2020/01/24 21:55] ixl2relax [TPS - Throttle Position Sensor] |
techtalk:evo:engctl03 [2020/04/20 01:46] ixl2relax [Cam Position Sensor] |
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| When the engine is rotated, the slotted cup rotor (in the 'nosecone') on the end of the camshaft will pass thru the cam sensor creating an alternating output on Pin(B). Since the sensor has a 12v power source, the measured voltage is predicted to be from below 2v to above 10v, alternating. | When the engine is rotated, the slotted cup rotor (in the 'nosecone') on the end of the camshaft will pass thru the cam sensor creating an alternating output on Pin(B). Since the sensor has a 12v power source, the measured voltage is predicted to be from below 2v to above 10v, alternating. | ||
| - | | {{:techtalk:evo:engctl:camsensorplate.jpg?300|}}\\ 1986-1993 All Models - 32400-80B Sensor Plate\\ 1994-1997 All Models - 32400-94A Sensor Plate | {{:common:space100x5px.jpg|}} | {{:techtalk:evo:engctl:camsensorcup.jpg?250|}}\\ \\ 32402-83 Rotor Cup\\ Used in 1986-1997 All Models\\ Also 1998-2003 Models except 1200S | {{:techtalk:evo:engctl:camsensorcup-1200s.jpg?250|}}((Pic - Steelworker http://xlforum.net/forums/showthread.php?t=1382357))\\ 1998-2003 1200S - 32422-98 Rotor Cup | | + | Being in an enclosed area (nosecone) of the engine, the Cam Sensor is subject to high temperatures. The potting material is subject to melting and may cause erratic timing. (This location for the Ignition Module on the 1998-2003 models also created high heat failure issues.) |
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| + | | {{:techtalk:evo:engctl:camsensorplate.jpg?300|}}\\ 1986-1993 All Models - 32400-80B Sensor Plate\\ 1994-1997 All Models - 32400-94A Sensor Plate | {{:techtalk:evo:engctl:camsensorplate-97-melted.jpg?200|}} \\ 1997 Cam Position Sensor Melted | | ||
| + | | {{:techtalk:evo:engctl:camsensorcup.jpg?250|}}\\ \\ 32402-83 Rotor Cup\\ Used in 1986-1997 All Models\\ Also 1998-2003 Models except 1200S | {{:techtalk:evo:engctl:camsensorcup-1200s.jpg?250|}}((Pic - Steelworker http://xlforum.net/forums/showthread.php?t=1382357))\\ 1998-2003 1200S - 32422-98 Rotor Cup | | ||
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| The new ICM/Cam Sensor Plate still operated the same way - There was a sensor on the back side of the plate - The sensor monitored a rotating cup mounted on the end of the cam - It had windows cut into the cup to create the spark timing for the ICM. | The new ICM/Cam Sensor Plate still operated the same way - There was a sensor on the back side of the plate - The sensor monitored a rotating cup mounted on the end of the cam - It had windows cut into the cup to create the spark timing for the ICM. | ||
| - | This design was problematic due to the high-heat location of the electronics. Due to the high failure rate, the MoCo did not continue the design nor a supply of stock replacement units. The only source for replacing a failed 1998-2003 nosecone ICM has been the aftermarket. | + | This design was problematic due to the high-heat location of the electronics. Due to the high failure rate, the MoCo did not continue the design nor a supply of stock replacement units. The only source for replacing a failed 1998-2003 nosecone ICM has been the aftermarket. ([[techtalk:ref:engctl01#ultima_-_nosecone_ignition|See the REF section regarding the Ultima Ignition Module.]]) |
| {{:techtalk:evo:engctl:camsensorplate-icm-98-03-a.jpg?300|}}{{common:space100x5px.jpg|}}{{:techtalk:evo:engctl:camsensorplate-icm-98-03-b.jpg?300|}} | {{:techtalk:evo:engctl:camsensorplate-icm-98-03-a.jpg?300|}}{{common:space100x5px.jpg|}}{{:techtalk:evo:engctl:camsensorplate-icm-98-03-b.jpg?300|}} | ||
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| ==== IAC - Idle Air Control ==== | ==== IAC - Idle Air Control ==== | ||
| - | The EFI Sportsters (2007-later) include an Idle Air Control (IAC) to set the idle speed of the engine. The IAC is mounted on the throttle body. See example in the 'EFI Manifold & Induction Module' picture. | + | The EFI Sportsters (2007-later) include an Idle Air Control (IAC) (see pic above) to set the idle speed of the engine. The IAC is mounted on the throttle body. |
| In normal operation, the opening and closing of the throttle plate in the throttle body (via the throttle cables) determines the amount of air flow into the intake manifold. But in the EFI system, the ECM controls the IAC which opens & closes an air pathway around the throttle plate to supply air into the manifold during engine idling. | In normal operation, the opening and closing of the throttle plate in the throttle body (via the throttle cables) determines the amount of air flow into the intake manifold. But in the EFI system, the ECM controls the IAC which opens & closes an air pathway around the throttle plate to supply air into the manifold during engine idling. | ||
