Diagnostic procedures for a VAG diagnostics
Database for coding vehicle control units Volkswagen - VAG
Software versions
VIN - Code validator
Engines / Petrol / 1.2/47kW AZQ/BME/BXV/BZG / Test - Lambda-sensor downstream of catalyst
Search:
Search area:
| Mark | Model | Control unit | Diagnostic operation |
|---|
Mark 
Model
Control unit
Diagnostic operation
Diagnostic procedure
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.
Conditions:
- exhaust system - tightness of line - OK
- engine temperature > XX °C
- catalyst temperature > XXX °C (XX - Measured values group XXX field X)
Start the engine
wait XXX s
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)
increase rpm to XXXX rpm
XX - Measured values group XXX
required values
field X = XXXX rpm
field X > XXX °C
XX - Measured values group XXX
required values field X (Lambda-sensor downstream of catalyst):
Xxxx = lambda control = active
xxXx = lambda control = readiness for operation
x?xx = heating of lambda probe(s)
XX - Basic settings group XXX
activate default settings
sharply depress - brake pedal + accelerator pedal
the control unit increases the engine speed
required values
field X = TEST ON
wait
required values
field X = BX-SX OK
upon achievement of values
release brake pedal + accelerator pedal
XX - Basic settings group XXX
activate default settings
sharply depress - brake pedal + accelerator pedal
the control unit increases the engine speed
required values
field X = X,XX - X,X V
field X = TEST ON -> BX-SX OK
may take several minutes
XX - end of communication
switch-off the engine
if continuously displayed field X > X,X V - check component:
- Lambda-sensor downstream of catalyst - line - short-circuit to + XXV
- Lambda-sensor downstream of catalyst - short-circuit to + XXV
if continuously displayed field X < X,XX V - check component:
- Lambda-sensor downstream of catalyst - line - short-circuit to GND
- Lambda-sensor downstream of catalyst - short-circuit to GND
if continuously displayed field X = X,XX - X,X - check component:
- Lambda-sensor downstream of catalyst - line - shut-off
- Lambda-sensor downstream of catalyst - shut-off
- exhaust system - tightness of line - OK
- engine temperature > XX °C
- catalyst temperature > XXX °C (XX - Measured values group XXX field X)
Start the engine
wait XXX s
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)
increase rpm to XXXX rpm
XX - Measured values group XXX
required values
field X = XXXX rpm
field X > XXX °C
XX - Measured values group XXX
required values field X (Lambda-sensor downstream of catalyst):
Xxxx = lambda control = active
xxXx = lambda control = readiness for operation
x?xx = heating of lambda probe(s)
XX - Basic settings group XXX
activate default settings
sharply depress - brake pedal + accelerator pedal
the control unit increases the engine speed
required values
field X = TEST ON
wait
required values
field X = BX-SX OK
upon achievement of values
release brake pedal + accelerator pedal
XX - Basic settings group XXX
activate default settings
sharply depress - brake pedal + accelerator pedal
the control unit increases the engine speed
required values
field X = X,XX - X,X V
field X = TEST ON -> BX-SX OK
may take several minutes
XX - end of communication
switch-off the engine
if continuously displayed field X > X,X V - check component:
- Lambda-sensor downstream of catalyst - line - short-circuit to + XXV
- Lambda-sensor downstream of catalyst - short-circuit to + XXV
if continuously displayed field X < X,XX V - check component:
- Lambda-sensor downstream of catalyst - line - short-circuit to GND
- Lambda-sensor downstream of catalyst - short-circuit to GND
if continuously displayed field X = X,XX - X,X - check component:
- Lambda-sensor downstream of catalyst - line - shut-off
- Lambda-sensor downstream of catalyst - shut-off
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.