Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Sfi system / Crankshaft position sensor ”a”
circuit / Circuit description
Toyota Corolla (E120): Circuit description
The crankshaft position sensor (ne signal) consists of a magnet, iron core and pickup coil.
The ne signal plate (crankshaft position sensor plate) has 34 teeth and is installed on the crankshaft. The ne signal sensor generates 34 signals for each engine revolution. This sensor monitors a plate (timing rotor) located on the crankshaft timing pulley and is used by the ecm to detect crankshaft angle and engine speed (rpm/ne). As the crankshaft timing pulley rotates through an engine revolution, this sensor communicates the rotation of the ne signal plate as a pulse signal to the ecm. Based on the signal, the ecm controls fuel injection time and ignition timing.
Reference: inspection using the oscilloscope.
Hint
: the correct waveform is as shown on the left.
Monitor description
If there is no signal from the crankshaft sensor despite the engine revolving, the ecm interprets this as a malfunction of the sensor.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Wiring diagram
Other materials:
Wiper & washer
Preparation
Sst
Recomended tools
Equipment
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Operating the touch screen
By touching the screen with your finger, you can control the multimedia system,
etc.
■ Drag*
Touch the screen with your finger, and move the screen to the desired position.
● Scrolling the lists
● Using scroll bar in lists
■ Flick*
Touch the screen with your finger an ...
Replacement
1. Remove console box sub–assy rear
2. Remove parking brake lever sub–assy
3. Remove exhaust pipe assy front
4. Remove front floor heat insulator no.1
Remove the 3 nuts and front floor insulator no.1.
5. Remove front floor heat insulator no.2
Remove the 2 nuts and front ...