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techtalk:evo:engctl03 [2020/08/13 03:50] hippysmack [TMAP - Temperature/Manifold Absolute Pressure] |
techtalk:evo:engctl03 [2020/08/13 04:21] hippysmack [TMAP - Temperature/Manifold Absolute Pressure] |
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| * The P0107 indicates that the reading was either absent or fell below the minimum range for some period of time. If not calibrated correctly or working properly the ECM will assign a canned value and use the other inputs to adjust the A/F ratio. It will greatly affect your richness/leaness if it is skewed or not registering accurate readings. | * The P0107 indicates that the reading was either absent or fell below the minimum range for some period of time. If not calibrated correctly or working properly the ECM will assign a canned value and use the other inputs to adjust the A/F ratio. It will greatly affect your richness/leaness if it is skewed or not registering accurate readings. | ||
| - | **TESTING the MAP SENSOR OUTPUT SSIGNAL** ((2005 HD Sportster Electrical Diagnostics Manual pg 4-35)) \\ | + | **TESTING the MAP SENSOR** ((2005 HD Sportster Electrical Diagnostics Manual pg 4-35)) \\ |
| The signal varies in accordance with engine vacuum and atmospheric barometric pressure. Changes in barometric pressure are influenced by weather and altitude. \\ | The signal varies in accordance with engine vacuum and atmospheric barometric pressure. Changes in barometric pressure are influenced by weather and altitude. \\ | ||
| - | * This requires a digital multi-meter set to the 0 - 20 volt dc setting (and optional Mityvac or other hand held vacuum pump). \\ See also [[techtalk:ref:tools160#mityvac_vacuum_pump_function_and_usage|MityVac Vacuum Pump Function and Usage]] in the Sportsterpedia. \\ | + | **Bypassing the MAP for Testing**: ((1998 HD Sportster FSM pg 7-33)) \\ |
| + | * With the MAP sensor disconnected, the ignition control module should recognize a low voltage. If low voltage is observed, the ignition control module and harness are not at fault. | ||
| + | *You can gently place a jumper wire across the MAP Sensor connector power and feed terminals. With the jumper in place, the ignition control module should recognize a high voltage. | ||
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| + | **MAP Output Voltage**: \\ | ||
| + | * This requires a digital multi-meter set to the 0 - 20 volt dc setting, MAP connected inline (and optional Mityvac or other hand held vacuum pump). \\ See also [[techtalk:ref:tools160#mityvac_vacuum_pump_function_and_usage|MityVac Vacuum Pump Function and Usage]] in the Sportsterpedia. \\ | ||
| * Typically most MAP sensors are simply a set of resistive strain guages mounted on a suitable substrate and forming a bridge circuit. ((Fe Head of the XLFORUM http://xlforum.net/forums/showthread.php?t=278587&page=3)) | * Typically most MAP sensors are simply a set of resistive strain guages mounted on a suitable substrate and forming a bridge circuit. ((Fe Head of the XLFORUM http://xlforum.net/forums/showthread.php?t=278587&page=3)) | ||
| * With the ignition switch turned to ON, test the leads as follows: | * With the ignition switch turned to ON, test the leads as follows: | ||
