Diagnostic procedures for a VAG diagnostics
Database for coding vehicle control units Volkswagen - VAG
Software versions
VIN - Code validator
Engines / Petrol / MED 9.5.10 CAN general / Test - lambda control - Lambda-sensor downstream of catalyst
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Diagnostic operation
Diagnostic procedure
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Conditions:
- exhaust system - tightness of line = OK
- appliances = OFF
- engine speed = idling
- engine temperature > XX °C
- catalyst temperature > XXX °C
connect with the control unit XX - engine
XX - Measured values group XXX
required values
field X = XXx (Lambda-sensor downstream of catalyst - status)
?xx = heating of lambda probe(s)
x?x = readiness for operation
xx? = lambda control
if values are not achieved - increase rpm to XXXX - XXXX rpm
wait
required values
field X = XXx (Lambda-sensor downstream of catalyst - status)
XX - Basic settings group XXX
activate default settings
depress and hold - brake pedal + accelerator pedal
required values
field X = XXXX rpm
field X > XXX °C
field X = Test. ON
wait
required values
field X = BX-SX - OK
release - brake pedal + accelerator pedal
upon non--achievement of condition - continue
switch-off the ignition
wait XX s
Start the engine
XX - Basic settings group XXX
activate default settings
depress and hold - brake pedal + accelerator pedal
observe values X minutes
field X = X V - X V (fluctuates)
(for this test, it is suitable to use graphical representation)
release - brake pedal + accelerator pedal
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,X V - check component:
- Lambda-sensor downstream of catalyst - line - short-circuit to GND
- Lambda-sensor downstream of catalyst - short-circuit to GND
- exhaust system - tightness of line = OK
- appliances = OFF
- engine speed = idling
- engine temperature > XX °C
- catalyst temperature > XXX °C
connect with the control unit XX - engine
XX - Measured values group XXX
required values
field X = XXx (Lambda-sensor downstream of catalyst - status)
?xx = heating of lambda probe(s)
x?x = readiness for operation
xx? = lambda control
if values are not achieved - increase rpm to XXXX - XXXX rpm
wait
required values
field X = XXx (Lambda-sensor downstream of catalyst - status)
XX - Basic settings group XXX
activate default settings
depress and hold - brake pedal + accelerator pedal
required values
field X = XXXX rpm
field X > XXX °C
field X = Test. ON
wait
required values
field X = BX-SX - OK
release - brake pedal + accelerator pedal
upon non--achievement of condition - continue
switch-off the ignition
wait XX s
Start the engine
XX - Basic settings group XXX
activate default settings
depress and hold - brake pedal + accelerator pedal
observe values X minutes
field X = X V - X V (fluctuates)
(for this test, it is suitable to use graphical representation)
release - brake pedal + accelerator pedal
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,X V - check component:
- Lambda-sensor downstream of catalyst - line - short-circuit to GND
- Lambda-sensor downstream of catalyst - 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.