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Measurement value blocks > < Checking glow plug system

Leon Mk1

  • Power unit
  • Diesel preheating and injection system
  • Self diagnosis, V.A.G Inspection Service
  • Fault memory: consulting

Fault table
   
Fault table
  Note!
t  The fault table is organised according to the 5 digit fault indications displayed on the left hand side.
t  If some components are detected: Firstly, check the cables and the connectors to and from these components, as well as the mass cables, according to the electric circuits schema. This step is especially important in cases when the faults are identified as being “sporadic” (SP).
t  Following the elimination of existing faults, the fault memory must be erased → Chapter.
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
00626   
Indicator for preheat time -K29-   
 Switch/short circuit to mass
t  Cable fault
t  Faulty lamp
t  Short circuit to mass
t  Preheat indicator does not function
t  Preheat indicator permanently turned on
–  Verify the preheating indicator -K29- → Current flow diagrams, Electrical fault finding and Fitting locations.
 Short circuit to positive
t  Short circuit to positive
t  Preheat indicator does not function
 

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
01050   
Power supply control for glow plugs   
 Switch/short circuit with mass
t  Cable interruption or short circuit with mass
t  Fuse -S125- faulty
t  Relay contact open
t  Unreliable cold start
t  The preheating indicator -K29- flashes
–  Check cables and connectors according to the electric circuits schema
–  If necessary, change the fuse -S125-
–  If necessary change the glow plugs
 Short circuit to positive
t  Short circuit to positive
t  Relay does not disconnect
t  Cycle of preheating repeats
–  Check cables and connectors according to the electric circuits schema

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
01167   
Full charge limit valve -N194-   
 Switch/short circuit with positive
t  Cable interruption or short circuit with positive
t  -N194- faulty
t  Reduced power
–  Verification -N194- → Chapter.
 Short circuit with mass
t  Short circuit of cable with mass
t  -N194- faulty
t  Black fumes at 1000 metres above sea level
 
01168   
Engine idle acceleration valve -N177-   
 Short circuit to positive
t  Short circuit of cable with positive
t  -N177- faulty
t  Excessive engine idle for hot engine
–  Verification -N177- → Chapter.
 Switch/short circuit with mass
t  Cable fault
t  -N177- faulty
t  Cable short-circuited with mass
t  Excessive engine idle for hot engine
t  Insufficient engine idle for cold engine
 

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
01169   
Contact switch for driver side door -F2-   
 Switch/short circuit with positive
t  Cable interruption or short circuit with positive
t  -F2- faulty
t  Preheating system is not activated when the driver side door is opened
–  Check the cables and connections according to the electric circuits schema.
 Short circuit with mass
t  Short circuit of cable with mass
t  -F2- faulty
 
–  If necessary, replace -F2- .
01170   
Injection duration sender -G175-   
 Short circuit with mass
t  Short circuit of cable with mass
t  The control unit for the preheating cycle -J179- switches to emergency operation
–  Check cables and connectors according to the electric circuits schema
 No signal
t  Cable interruption or short circuit
t  -G175- faulty
 
–  If necessary, replace -G175-.

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
01180   
Electrical connection for engine/air compressor for air conditioning   
 Short circuit to positive
t  Short circuit in wiring
t  Less acceleration available when air conditioning is on
–  Check the intervention of the air conditioning air compressor → Chapter.
01204   
Engine temperature sender -G27-   
 Short circuit with mass
t  Cable short-circuited with mass
t  -G27- faulty
t  Without preheating
t  Without increase in engine idle speed for a cold engine
t  Increased emission values
–  Verification -G27- → Chapter.
 Switch/short circuit with positive
t  Cable interruption or short circuit with positive
t  -G27- faulty
t  Cycle of preheating always carried out
–  Verification -G27- → Chapter.

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
01265   
Exhaust gas recirculation valve -N18-   
 Switch/short circuit to earth
t  Cable fault
t  Faulty valve
t  No exhaust gas recirculation
–  Verification -N18- → Chapter.
  
t  Short circuit to mass
t  Excessive exhaust gas recirculation
t  Reduced power and black fumes
 
 Short circuit to positive
t  Short circuit to positive
t  No exhaust gas recirculation
 

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault elimination
01266   
Relay for glow plugs -J52-   
 Switch/short circuit to earth
t  Cable fault
t  Glow plug relay faulty
t  Preheating system does not function
–  Verification -J52- → Chapter.
  
t  Short circuit to mass
t  Preheating system permanently activated
 
 Short circuit to positive
t  Short circuit to positive
t  Preheating system does not function
 

   
Message printed by the printer of the -V.A.G 1551-Possible cause of the faultPossible resultsFault eliminationFehlerbeseitigung
01269   
Injection commencement valve -N108-   
 Switch/short circuit to earth
t  Cable fault
t  Injection commencement valve, faulty
t  Engine knocking at injection commencement always early
t  Blue exhaust fumes for cold engine
–  Verification -N108- → Chapter.
  
t  Short circuit to mass
t  Lack of power due to late injection commencement
 
 Short circuit to positive
t  Short circuit to positive
t  Engine knocking at engine idle because injection commencement is always early
 

   

  • Power unit
  • Diesel preheating and injection system
  • Self diagnosis, V.A.G Inspection Service
  • Fault memory: consulting

Measurement value blocks > < Checking glow plug system