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Self-diagnosis III > < Self-diagnosis II

Octavia Mk1

Fault table
Fault table
  Note
t  The fault table is ordered according to the 5-digit fault code on the left.
t  Explanations on fault types (e.g. “interruption/short-circuit to earth”): → Operating instructions of vehicle system tester
t  If parts are output as faulty: First test all of the cables and plug connections to these components as well as the earth cables of the system according to the current flow diagram. Replace component only if these tests do not reveal any fault. This applies in particular if the fault is shown as sporadic (SP).
   
Display -V.A.G 1552-Possible cause of faultPossible effectsRectifying fault
No fault detected!If there is a complaint:
Fault not detected by self-diagnosis.		---Fault finding according to fault table, in binder “engine fault finding”.
00282   
Throttle valve positioner -V60-1)   
 Short circuit to earth
t  Short circuit to earth
t  -V60- defective or jams in direction open
t  Cold start problems
t  Cold idling problems
t  Rough load alteration
t  Idle problems
–  Check -V60- → Chapter.
 Short circuit to positive
t  Short circuit to positive
t  -V60- defective or jams in direction open
 Open circuit
t  Line interruption
 Signal outside tolerance
t  Short-circuit to earth and (or) battery positive
00516   
Idling switch -F60-2)   
 implausible signal
t  -F60- defective
t  Idle problems
t  Poor vehicle handling when starting
–  Perform basic setting → Chapter.
–  Check -F60- → Chapter.

1) The throttle valve positioner -V60- is a component part of the throttle valve control unit -J338-.
2) The idling switch -F60- is a component part of the throttle valve control unit - J338-.
   
Display -V.A.G 1552-Possible cause of faultPossible effectsRectifying fault
00518   
Throttle valve potentiometer -G69-1)   
 Short circuit to earth
t  -G69- defective
t  Line short-circuit to earth
t  poor throttle response
t  Rough load alteration
t  Increased emission levels
t  no full-load detection
–  Perform basic setting → Chapter.
–  Check -G69- → Chapter.
 Open circuit or short circuit to positive
t  Line interruption
t  Line short-circuit to positive
t  -G69- defective
00519   
Intake manifold pressure sender -G71-   
 Short circuit to positive
t  Line short-circuit to positive
t  Increased emission levels
t  poor throttle response
t  Rough load alteration
–  Check -G71- → Chapter.
 Line interruption or short-circuit to earth
t  Line interruption
t  Line short-circuit to earth
t  -G71- defective
 implausible signal
t  Loose contact
t  -G71- defective
00522   
Coolant temperature sender -G62-   
 Short circuit to earth
t  Line short-circuit to earth
t  -G62- defective
t  poor cold start behaviour
t  Poor hot-start performance
t  no idle speed adaptation
t  Increased emission levels
–  Check -G62- → Chapter.
 Open circuit or short circuit to positive
t  Line interruption or short-circuit to pos. term.
t  -G62- defective

1) The throttle valve positioner - G69- is a component part of the throttle valve control unit -J338-.
   
Display -V.A.G 1552-Possible cause of faultPossible effectsRectifying fault
00523   
Intake air temperature sender-G42-   
 Short circuit to earth
t  Line short-circuit to earth
t  -G42- defective
t  Poor hot-start performance
t  Increased emission levels
–  Check -G42- → Chapter.
 Open circuit or short circuit to positive
t  Line interruption or short-circuit to pos. term.
t  -G42- defective
00524   
Knock sensor 1 -G61-   
 Signal too low
t  Line interruption or short-circuit to earth
t  -G61- defective
t  Ignition point is reduced by 15 ∠ °
t  reduced performance
t  increased fuel consumption
–  Check -G61- → Chapter.
  
00525   
Lambda probe -G39-   
 Short circuit to positive
t  Line short-circuit to positive
t  -G39- defective
t  no lambda control
–  Test lambda probe and lambda control → Chapter.
 Signal too high
t  -G39- defective
 Signal too low
t  -G39- defective
t  Line short-circuit to earth
00529   
Speed information missing   
 no signal
t  Hall sender -G40- in ignition distributor defective.
t  Line interruption
t  Line short-circuit to positive
t  Line short-circuit to earth
t  Engine does not start
–  Check -G40- → Chapter.
00530   
Throttle valve positioner/potentiometer -G88-1)   
 Open circuit or short circuit to positive
t  Line interruption or short-circuit to pos. term.
t  -G88- defective
t  poor cold start behaviour
t  Idling speed not in the tolerance
t  Cold idling problems
t  irregular idling
–  Check -G88- → Chapter.
 Short circuit to earth
t  Line short-circuit to earth
t  -G88- defective
00532   
Supply voltage   
 Signal too high
t  Battery voltage above 16.3 V
t  no idle speed adaptation
–  Inspect AC generator → Current flow diagrams and Fitting locations.
00537   
Lambda control   
 Regulating limit exceeded
t  Lambda probe heater faulty
t  no lambda control
t  Poor vehicle handling
t  Poor idling
t  Emission levels N.O.K.
–  Check lambda probe heater for open circuit in wiring → Chapter.
 
t  Exhaust system between cylinder head and catalytic converter leaking
–  Check exhaust system for leaks.
t  Ignition misfiring
–  Check ignition system → Chapter.
t  Fuel pump defective
–  Check fuel pump → 1.6 ltr./55 kW Engine, Mechanics; Rep. Gr.20
 
 
t  Fuel pressure regulator defective
–  Inspect fuel pressure regulator → Chapter.
t  Lambda probe defective - characteristic changed by chemical reaction
–  Replace lambda probe.
t  Fuel tank empty
–  Fill up vehicle.
t  Injection valve(s) defective (blocked)
–  Testing injection valves → Chapter.
t  Short-circuit to earth or positive, i.e line interruption between lambda probe and engine control unit
–  Checking lambda control → Chapter.
 Regulating limit not reached
t  Short-circuit to earth or positive, i.e line interruption between lambda probe and engine control unit
t  no lambda control
t  Poor vehicle handling
t  Poor idling
t  Emission levels N.O.K.
t  Increased fuel consumption
–  Checking lambda control → Chapter.
t  Fuel pressure too high
–  Inspect fuel pressure regulator → Chapter.
t  Activated charcoal filter system solenoid valve N80 leaking or jams
–  Check N80 → Chapter.
t  Lambda probe defective - characteristic changed by chemical reaction
–  Replace lambda probe.
t  Injection valve(s) defective (always open)
–  Testing injection valves → Chapter.
00609   
Ignition outlet 1   
 Short circuit to positive
t  Line to ignition transformer has short-circuit to positive
t  Engine does not start
–  Check power output stage of ignition transformer → Chapter.
 Line interruption or short-circuit to earth
t  Line interruption
t  Line short-circuit to earth
01087   
 Basic setting not performed
t  Engine control unit 1AVM not configured for engine
---
–  Perform basic setting → Chapter.
01126   
Engine speed signal   
 Short circuit to positive
t  Line interruption or short-circuit to pos. term.
t  Rev counter not operational
–  Check speed signal → Chapter.
 Short circuit to earth
t  Line short-circuit to earth
01247   
Activated charcoal filter system solenoid valve 1 -N80-   
 Line interruption or short-circuit to earth
t  Line interruption or short-circuit to earth
t  -N80- defective
t  irregular idling
t  Smell of fuel
–  Check -N80- → Chapter.
 Short circuit to positive
t  Line short-circuit to positive
t  -N80- defective
01249   
Injector cyl. 1 -N30-   
 Short circuit to positive
t  -N30- defective
t  Line short-circuit to positive
t  Increased emission levels
t  poor starting
t  Poor vehicle handling
t  poor throttle response
t  irregular idling
–  Check -N30- up to -N33- → Chapter.
 Line interruption or short-circuit to earth
t  -N30- defective
t  Line interruption
t  Short circuit to earth
01250   
Injector cyl. 2 -N31-   
 Short circuit to positivesee fault code 01249, cylinder 1
 Line interruption or short-circuit to earth   
01251   
Injector cyl. 3 -N32-   
 Short circuit to positivesee fault code 01249, cylinder 1
 Line interruption or short-circuit to earth   
01252   
Injector cyl. 4 -N33-   
 Short circuit to positivesee fault code 01249, cylinder 1
 Line interruption or short-circuit to earth   
01259   
Fuel pump relay -J17-   
 Short circuit to positive
t  -J17- defective
t  Line short-circuit to positive
t  Engine does not start
–  Check -J17- → Chapter.
 Line interruption or short-circuit to earth
t  -J17- defective
t  Line interruption
t  Short circuit to earth
17978   
Engine control unit blocked
t  Manipulation attempt
t  Short-circuit in communication cable
t  incorrect coding
t  Immobilizer control unit defective/missing
t  Engine starts quickly and then stops again
–  Adapt engine control unit 1AV to immobiliser → Chapter.
–  Test electronic immobiliser → Electrical System; Rep. Gr.96.
65535   
Control unit defective
t  Control unit internally defective
t  Poor vehicle handling
t  Engine stoppage
–  Replace if necessary -J382- → Chapter.

1) The throttle valve positioner - G88- is a component part of the throttle valve control unit -J338-.
   

Self-diagnosis III > < Self-diagnosis II