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Self-diagnosis IV > < Reading readiness code

Fabia Mk1

Generating readiness code
Generating readiness code
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552- with cable -V.A.G 1551/3, 3A, 3B oder 3C-
Test conditions
l  All electrical consumers, e.g. lights and rear window heater switched off.
l  Intake air temperature must be below 60°C ⇒ display group number 007, display field 3
l  Coolant temperature at least 83°C ⇒ display group number 007, display block 4
Procedure
–  Connect vehicle system tester -V.A.G 1552-. Select address word 01 “Engine electronics” → Chapter.
  Note
Certain steps must be carried out twice, in order to achieve the readiness code.
Work step 1: Interrogating fault memory
–  Enter function 02“Interrogate fault memory” and confirm with Q.
   
The number of stored faults or “No fault recognised” appears in the display.
If a fault is stored in the memory:
–  Rectify the faults by referring to the fault table → Chapter.
If no fault is stored:
–  Press →.
Work step 2: Erasing fault memory
–  Enter function 05“Erase fault memory” and confirm with Q.
  Note
Readiness code is erased each time the fault memory is erased.
  
X faults detected                     →

      

      

    
      

      

    
Readout on display:
 
      Note
If the ignition is switched off during “Interrogating fault memory” and “Erasing fault memory”, the fault memory is not erased.
– 
          Press →.
Work step 3:   Switch off ignition
– 
          Min. Wait 5 seconds with ignition OFF.
 
      Note
This point is important, because with certain diagnoses the slowing down of the control unit must be ended. Otherwise readiness code cannot be generated.
Work step 4:   Switch on ignition
– 
          Min. Wait 10 seconds with ignition ON.
Charge pressure sender is adapted with atmospheric charge pressure sender.
Work step 5:   1. Testing fuel supply and other systems
– 
          Start engine.
– 
          Function 08“Read measured value block” and then select display group number 001.
– 
          For 5 seconds increase the engine speed to 2500 rpm and then run engine at idling speed.

      		 
      
    
Vehicle system test                   ->
The fault memory is erased

      

      

    
      

      

    
Readout on display:
Work step 6:   1. Testing exhaust gas recirculation
– 
          Increase engine speed to 1600 rpm up to 1700 rpm and maintain it for at least 10 seconds in this range.

      		 
      
    
Reading measured value block         1   ->
2500 rpm    4.6 mg/s    2.0°CA   94.2 °C

      

      

    
      

      

    
Readout on display:
In this speed range, the exhaust gas recirculation is active and the control difference is checked. (Condition for readiness code to generate exhaust gas recirculation).
Work step 7:   Switch off ignition
– 
          Min. Wait 5 seconds with ignition OFF.
Work step 8:   Switch on ignition
– 
          Min. Wait 10 seconds with ignition ON.
Work step 9:   2. Testing fuel supply and other systems
– 
          Start engine.
– 
          Function 08“Read measured value block” and then select display group number 001.
– 
          For 5 seconds increase the engine speed to 2500 rpm and then run engine at idling speed.

      		 
      
    
Reading measured value block         1   ->
1650 rpm    4.1 mg/s    4.0°CA   93.2 °C

      

      

    
      

      

    
Readout on display:
Work step 10:   2. Testing exhaust gas recirculation
– 
          Increase engine speed to 1600 rpm up to 1700 rpm and maintain it for at least 10 seconds in this range.

      		 
      
    
Reading measured value block         1   ->
2500 rpm    4.6 mg/s    2.0°CA   94.2 °C

      

      

    
      

      

    
Readout on display:
– 
          Press C.
– 
          Enter 017 for display group number 017 and read readiness code.

      		 
      
    
Reading measured value block         1   ->
1650 rpm    4.1 mg/s    4.0°CA   93.2 °C

      

      

    
      

      

    
Readout on display:
Specification in display field 2: 00000110
Specification in display field 4: 00000000
– 
          Press →.
– 
          If the specified values are not reached, once again repeat procedure for generating readiness code  → Chapter.
Work step 11:   Interrogating fault memory
– 
          Enter function 02“Interrogate fault memory” and confirm with Q.

      		 
      
    
Reading measured value block         17   ->
00000000  00000110  10000000    00000000

      

      

    
      

      

    
The number of stored faults or “No fault recognised” appears in the display.
If a fault is stored in the memory:
– 
          Rectify the faults by referring to the fault table  → Chapter and generate readiness code again  → Chapter.
If no fault is stored:
– 
          Press →.

      		 
      
    
X faults detected                     →

      

      

    
      

      

    
Readiness code was successfully generated, if no fault is stored after two work sequences of the test procedure in the fault memory for the engine control unit and if the following display appears in the channel 017.

      		 
      
    
Reading measured value block         17   ->
00000000  00000110  10000000    00000000

      

      

    


Self-diagnosis IV >
< Reading readiness code