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Self diagnosis of Climatronic
Fault table
Note:
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◆ The following table lists all the faults, with the corresponding 5 digit code numbers, that can be recognized by the Climatronic control unit -J255- and printed out by the V.A.G 1551.
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◆ If a fault does not occur regularly or if the fault memory is not deleted after elimination of fault, these faults are displayed as sporadic faults.
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◆ Fault codes appear only on print-out.
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◆ Fault table may also include type of fault.
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◆ When repair has been carried out, the fault memory must always be interrogated again with the fault reader V.A.G 1551 and erased.
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◆ If, despite customer's complaint, no fault in Climatronic can be found, carry out "Final control diagnosis" (
). If necessary, carry out fault finding for specific complaints without self-diagnosis:
=> Fault finding, Heating, Air Conditioning - Binder 2
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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No fault recognized
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If "No fault recognized" appears after performing repairs, the self diagnosis is ended.
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00522
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Coolant temperature sender -G62-
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Open circuit/short to positive1)
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Open circuit or short circuit in wires or connectors to coolant temperature sender -G62-
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- Check -G62- using "Read measuring value block" => Page 01-32
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Short to earth1)
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-G62- defective
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- Check wires and connectors using current flow diagram
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- Renew -G62-
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1)
One of these read-outs is displayed in addition to relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00766
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Vent temperature sender
-G152-
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Open circuit/short to positive1)
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Short circuit or open circuit in wiring or connections to vent temperature sender -G152-
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- Check -G152- using "Read measured value block" => Page 01-32
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Short to earth1)
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-G152- defective
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- Check wires and connectors using current flow diagram
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- Replace -G152-
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1)
One of these read-outs is displayed in addition to relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00281
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Road speed sender -G68-1)
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Short circuit or open circuit in wires or connectors from junction box for speed signal -TV13- to Climatronic control unit
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- Check signal from -G22- or -G54- using "Read measuring value block" => Page 01-32
Check wires and connectors using current flow diagram
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Speed sender -G54- defective
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- Renew -G54-
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Speedometer sender -G22-, defective on gearbox (only when speedometer -G21- also malfunctions)
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- Renew -G22-
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Cannot be checked at present
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This read out only appears when the final control diagnosis was carried out before interrogation of fault memory and it is irrelevant to self diagnosis. This fault will be erased from control unit fault memory when ignition is switched off.
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1)
A fault has been found with speedometer sender -G22- (vehicles with electronic speedometer sender) or speed sender -G54- (vehicles with mechanical speedometer sender) and not from speed sender -G68-. The fault is only recognised if 5 driving cycles take place within 4 minutes after starting engine and no speed signal is measured.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00532
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Supply voltage
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Signal too large1)
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Alternator defective
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- Check supply voltage using "Read measured value block"
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Signal too small1)
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Wires or connectors to Climatronic control unit -J255-
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- Check wires and connectors to control unit using current flow diagram
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- Check alternator:
=> Current flow diagrams, Electrical fault finding, Fitting locations
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1)
One of these messages will be displayed in addition to indication of relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00538
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Reference voltage
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Voltage to earth at -T5/2- or -T28a/23- more than 5.2 V (on vehicles from 08.95: more than 5.4 V or less than 4.4 V
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Signal too large1)
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Short circuit or open circuit in wires or connectors -T5/2- or -T28a/23- on Climatronic control unit -J255-
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- Check wires and connectors to control unit using current flow diagram
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Signal too small1)
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Sunlight penetration photo sensor -G107- or potentiometer -G92- or potentiometer -G112- defective or potentiometer -G113- defective
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- Unplug connectors of these components one at a time, erase fault memory (=> Page 01-8
). If the "Reference voltage" fault is no longer recognised, the relevant component must be renewed.
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Control unit faulty
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- Replace control unit if necessary
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1)
One of these messages will be displayed in addition to indication of relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00779
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Ambient temperature sensor -G17-
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Open circuit/short to positive1)
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Short circuit or open circuit in wiring or connectors to ambient temperature sensor -G17-
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- Check -G17- using "Read measuring value block" => Page 01-32
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Short to earth1)
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-G17- defective
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- Check wiring and connectors using current flow diagram
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- Renew -G17-
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1)
One of these messages will be displayed in addition to indication of relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00785
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Instrument panel temperature sensor -G56-
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Open circuit/short to positive1)
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Short circuit or open circuit in wiring or connectors to instrument panel temperature sensor -G56-
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- Check -G56- using "Read measuring value block" => Page 01-32
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Short to earth1)
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-G56- defective
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- Check wiring and connectors using current flow diagram
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- Renew -G56-
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1)
One of these messages will be displayed in addition to indication of relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00787
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Fresh air intake duct temperature sensor -G89-
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Open circuit/short to positive1)
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Short circuit or open circuit in wiring or connectors to fresh air intake duct temperature sensor -G89-
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- Check -G89- using "Read measuring value block" => Page 01-32
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Short to earth1)
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-G89- defective
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- Check wiring and connectors using current flow diagram
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- Renew -G89-
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1)
One of these messages will be displayed in addition to indication of relevant component.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00792
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Pressure switch for air conditioner -F129-1)
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Short circuit or open circuit in wiring or connectors to pressure switch for air conditioner -F129
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- Check -F129- with "Read measuring value block" => Page 01-32
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Refrigerant circuit incorrectly charged or refrigerant insufficiently cooled
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- Check wiring and connectors using current flow diagram
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-F129- defective
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- Renew -F129-
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Cannot be checked at present
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This read-out appears only when the final control diagnosis was carried out before interrogation of fault memory and pressure switch could not be checked (e.g. when outside temperature is below 12°C). This fault will be erased from control unit fault memory when ignition is turned off.
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1)
This fault cannot be recognized if outside temperature is below 12°C or -G17- and -G89- both malfunction simultaneously.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00796
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Temperature sensor blower -V42-
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Dust may be blocking blower air intake
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- Carry out visual check; if necessary, clean -V42-
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Short circuit or open circuit in wiring or connectors to temperature sensor blower -V42-
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- Check wiring and connectors using current flow diagram
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-V42- defective
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- Renew -V42-
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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00797
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Sunlight penetration photo sensor -G107-
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Open circuit/short to positive
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Open circuit or short circuit in wiring or connectors to sunlight penetration photo sensor -G107-
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- Check -G107- using "Read measuring value block" => Page 01-32
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-G107- defective
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- Check wiring and connectors using current flow diagram
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- Renew -G107-
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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01271
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Temperature flap positioning motor -V68-5)
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Short circuit or open circuit in wiring or connectors to temperature flap positioning motor -V68-
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- Check wiring and connectors using current flow diagram
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-V68- incorrectly adjusted
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- Check and adjust end position of positioning motor -V68- with motor installed in vehicle => Page 87-70
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-V68- defective
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- Carry out final control diagnosis => Page 01-27
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- Renew -V68-
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1)
Fault is recognized after 30 seconds at earliest.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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01272
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Central flap positioning motor -V70-5)
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Short circuit or open circuit in wiring or connectors to central flap positioning motor -V70-
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- Check wiring and connectors using current flow diagram
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-V70- defective
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- Carry out final control diagnosis => Page 01-27
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- Renew -V70-
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1)
Fault is recognized after 30 seconds at earliest.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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01273
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Fresh air blower -V2-
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Short circuit or open circuit in wiring or connectors to fresh air blower -V2-
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- Check wiring and connectors using current flow diagram
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- Carry out final control diagnosis => Page 01-27
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Blower control unit -J126- defective
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- Renew -J126-
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-V2- defective
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- Renew -V2-
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Air conditioner pressure switch -F129- defective
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- Replace -F129- when 12V is present at input, contact 2, and 5V is present at output, contact 1
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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01274
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Air flow flap positioning motor -V71-1)
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Short circuit or open circuit in wiring or connectors to air flow flap positioning motor -V71-
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- Check wiring and connectors using current flow diagram
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-V71- defective
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- Carry out final control => Page 01-27
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- Renew -V71-
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1)
Fault is recognized after 30 seconds at earliest.
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V.A.G 1551 printout
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Possible cause of fault
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Rectifying fault
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65535
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Control unit defective
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Electrical interference caused by outside sources, poor earth connections or positive connections to control unit -J255-
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- Check wiring and connectors to control unit using current flow diagram
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Sunlight penetration photo sensor -G107- or potentiometer -G92- or potentiometer -G112- defective or potentiometer -G113- defective
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- Unplug connectors to these components one at a time, delete fault memory (=> Page 01-8
). If "Control unit defective" fault is no longer recognized, the relevant component must be renewed.
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Control unit faulty
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- Replace control unit if necessary
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