The rotary solenoid type IAC valve is located in front of the intake air chamber and intake air bypassing the throttle valve is directed to the IAC valve through a passage. In this way, the intake air volume bypassing the throttle valve is regulated, controlling the engine speed. The ECM operates only the IAC valve to perform idle–up and provide feedback for the target idling speed.
Showing posts with label engine speed. Show all posts
Showing posts with label engine speed. Show all posts
Wednesday, June 2, 2010
2002 Toyota Tacoma Idle Control System Malfunction Engine Diagnostics
2:42 AM by onesecond
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Labels: air fuel ratio, air volume, ecm, engine diagnostics, engine speed, idle control system malfunction, neutral position, obd ii scan tool, rotary solenoid, solenoid, speed inspection, target, throttle valve, Toyota, toyota tacoma
Labels: air fuel ratio, air volume, ecm, engine diagnostics, engine speed, idle control system malfunction, neutral position, obd ii scan tool, rotary solenoid, solenoid, speed inspection, target, throttle valve, Toyota, toyota tacoma
2002 Toyota Tacoma Crankshaft Position Sensor ”A” Circuit Malfunction Diagnostics
2:33 AM by onesecond
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Labels: air fuel ratio, crankshaft, crankshaft angle, crankshaft position sensor, ecm, engine speed, mechanical systems, obd ii scan tool, oil pump, oscilloscope, signals, teeth, Toyota, toyota tacoma, waveform, waveforms
Labels: air fuel ratio, crankshaft, crankshaft angle, crankshaft position sensor, ecm, engine speed, mechanical systems, obd ii scan tool, oil pump, oscilloscope, signals, teeth, Toyota, toyota tacoma, waveform, waveforms
The crankshaft position sensor, which detects the engine speed and crankshaft angle signal (NE signal), has been installed on the oil pump body. The NE signal plate has 34 teeth. The NE signal sensor generates 34 signals at every engine revolution. The ECM detects the standard crankshaft angle based on the G signal, and the actual crankshaft angle and the engine speed by the NE signal.
Saturday, May 22, 2010
3 3/4" Tachometer Engine Cylinder Adjustments Installation
4:43 AM by onesecond
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Labels: auto gage, board move, cylinder engines, engine cylinder, engine speed, illustration, max horsepower, mounting bracket, PDF Download, phillips screw, pointer, red shift, rpm, screw hole, shift light, shift point, smooth surface, switches, tach, tachometer
Labels: auto gage, board move, cylinder engines, engine cylinder, engine speed, illustration, max horsepower, mounting bracket, PDF Download, phillips screw, pointer, red shift, rpm, screw hole, shift light, shift point, smooth surface, switches, tach, tachometer
This tachometer is factory calibrated for 8 cylinder engines. For operation on 4 or 6 cylinder engines, a switch adjustment must be made.
1. Remove cup by placing the tachometer face down on a smooth surface. Remove the phillips screw on the back and gently lift the cup off to expose the circuit board. Take care
not to pull on the wires.
2. Locate the switch on the circuit board. Move each of the two switches to the proper cylinder selection according to the diagram illustration on the right.
4 Cyl.- Both switches down
6 Cyl.- Switch #1 down. Switch #2 up
8 Cyl.- Both switches up
3.Replace the case on the tach with mounting bracket at the bottom (make sure the wires are clear of the screw hole).
4. Replace the screw
1. Remove cup by placing the tachometer face down on a smooth surface. Remove the phillips screw on the back and gently lift the cup off to expose the circuit board. Take care
not to pull on the wires.
2. Locate the switch on the circuit board. Move each of the two switches to the proper cylinder selection according to the diagram illustration on the right.
4 Cyl.- Both switches down
6 Cyl.- Switch #1 down. Switch #2 up
8 Cyl.- Both switches up
3.Replace the case on the tach with mounting bracket at the bottom (make sure the wires are clear of the screw hole).
4. Replace the screw
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