Diagnostic procedures for a VAG diagnostics
Database for coding vehicle control units Volkswagen - VAG
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VIN - Code validator
Engines / Petrol / MED 9.1 general / Test - Lambda-sensor downstream of catalyst - lambda control
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Diagnostic procedure
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Conditions:
- exhaust system - tightness of line - OK
- engine speed = idling
- engine temperature > XX °C
- catalyst temperature >= XXX °C (XX - Measured values group XXX field X)
connect with the control unit XX - engine
XX - Measured values group XXX
required values field X (Lambda-sensor upstream of catalyst):
xxxxX = lambda control = active
xxxXx = lambda control = readiness for operation
xx?xx = heating of lambda probe(s)
if values are not achieved increase rpm to XXXX rpm
XX - Measured values group XXX
required values field X (Lambda-sensor downstream of catalyst):
xxxxX = lambda control = active
xxxXx = lambda control = readiness for operation
xx?xx = heating of lambda probe(s)
if values are not achieved increase rpm to XXXX rpm
XX - Measured values group XXX
required values
field X = X,XXV - X,XV - fluctuates (Lambda-sensor downstream of catalyst - voltage)
if values are not achieved:
field X > X,XV (not fluctuates) = short-circuit to +XXV
field X = X,XV - X,XV = shut-off, lambda control fault
field X < X,XX = short-circuit to GND
- exhaust system - tightness of line - OK
- engine speed = idling
- engine temperature > XX °C
- catalyst temperature >= XXX °C (XX - Measured values group XXX field X)
connect with the control unit XX - engine
XX - Measured values group XXX
required values field X (Lambda-sensor upstream of catalyst):
xxxxX = lambda control = active
xxxXx = lambda control = readiness for operation
xx?xx = heating of lambda probe(s)
if values are not achieved increase rpm to XXXX rpm
XX - Measured values group XXX
required values field X (Lambda-sensor downstream of catalyst):
xxxxX = lambda control = active
xxxXx = lambda control = readiness for operation
xx?xx = heating of lambda probe(s)
if values are not achieved increase rpm to XXXX rpm
XX - Measured values group XXX
required values
field X = X,XXV - X,XV - fluctuates (Lambda-sensor downstream of catalyst - voltage)
if values are not achieved:
field X > X,XV (not fluctuates) = short-circuit to +XXV
field X = X,XV - X,XV = shut-off, lambda control fault
field X < X,XX = short-circuit to GND
You are not logged! System works in DEMO mode only now where numbers are replaced with X characters. For 49 EUR only You will get access into full system. You can pay by credit card or bank transfer. Click BUY button for purchase and You will get login to diagnostic procedures database imediatelly.