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Display group 04 at full throttle (test drive in 3rd or 4th gear, coolant temperature not below +85 °C) > < Display group 01 at idling speed (engine warm, coolant temperature not below +85 °C)

A4 Mk1

Display group 04 at idling speed (engine warm, coolant temperature not below +85 °C)
   
Display group 04 at idling speed (engine warm, coolant temperature not below +85 °C)
   
 Read measured value block 4→▾ Indicated on display 
 760 rpm2.0° ATDC1.6° ATDC73 %  
     Duty cycle (activation) of commencement of injection valve
l  No specification
 
    Current commencement of injection
l  2° ATDC...2° BTDC: okay
l  Retarded more than 2° ATDC: commencement of injection valve defective
Injection pump retarded much too far
⇒ check injection timing control range, → Chapter
l  Advanced more than 2° BTDC: engine too cold ⇒ run engine till warm
Injection pump set too advanced
commencement of injection defective
⇒ check injection timing control range, → Chapter		 
   Commencement of injection specified by control unit
l  2° ATDC...2° BTDC: okay
 
  Engine speed
l  720...800 rpm okay
 
   

   

Display group 04 at full throttle (test drive in 3rd or 4th gear, coolant temperature not below +85 °C) > < Display group 01 at idling speed (engine warm, coolant temperature not below +85 °C)