Volkswagen New Beetle. Manual - part 170

 

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Volkswagen New Beetle. Manual - part 170

 

 

Fig. 22: Single Injector - Known Good - Voltage Pattern 

EXAMPLE #5 - CURRENT CONTROLLED DRIVER 

These two known-good waveform patterns are from a Chrysler 3.0L V6 VIN [3]. The first waveform, Fig. Fig. 
23
 , is a dual trace pattern that illustrates how Chrysler uses the rising edge of the engine speed signal to trigger 
the injectors. The second waveform, Fig. Fig. 24 , was taken during hot idle, closed loop, and no load. 

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Waveforms - Injector Pattern Tutorial

  

Fig. 23: Injector Bank - Known Good - Voltage Pattern

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Waveforms - Injector Pattern Tutorial

  

Fig. 24: Injector Bank - Known Good - Voltage Pattern 

EXAMPLE #6 - CURRENT CONTROLLED DRIVER 

This known-good pattern from a Ford 3.0L V6 PFI VIN [U] illustrates that a zener diode inside the computer is 
used to clamp the injector's inductive kick to 35-volts on this system. See Fig. 25 .  

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Waveforms - Injector Pattern Tutorial

  

Fig. 25: Injector Bank - Known Good - Voltage Pattern 

EXAMPLE #7 - CURRENT CONTROLLED DRIVER 

This known-good waveform from a Ford 5.0L V8 CFI VIN [F] was taken during hot idle, closed loop, and no 
load. See Fig. 26 .  

 

1998 Chevrolet Pickup C1500 

GENERAL INFORMATION Waveforms - Injector Pattern Tutorial

  

 

 

 

 

 

 

 

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