Diagnostic procedures for a VAG diagnostics
Database for coding vehicle control units Volkswagen - VAG
Software versions
VIN - Code validator
Engines / Petrol / 1.8/118/112 kW TFSI CDAA/CEA/CEAA/CDAB / Test - knock sensor 1;2 - regulation of advance
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Model
Control unit
Diagnostic operation
Diagnostic procedure
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Conditions:
- second mechanic necessary!
- knock sensor - line = OK
- observe the occupation safety rules when taking a test drive with connected diagnostics tester
Start the engine - engine speed = idling
connect with the control unit XX - engine
do a test drive
Conditions:
- engine temperature > XX °C
- idling -> partial load -> full load -> deceleration
- full load = engine speed > XXXX rpm
XX - Measured values group XXX
required values
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
XX - end of communication
if values are not achieved - field X + X + X + X - partial load, full load - check component:
- loose engine parts
- engine
- Fuel (XX oct.)
- knock sensor - line
- knock sensor - tightening torque (XX Nm)
- knock sensor
- knock sensor - connector connections
- cylinder head - height
- second mechanic necessary!
- knock sensor - line = OK
- observe the occupation safety rules when taking a test drive with connected diagnostics tester
Start the engine - engine speed = idling
connect with the control unit XX - engine
do a test drive
Conditions:
- engine temperature > XX °C
- idling -> partial load -> full load -> deceleration
- full load = engine speed > XXXX rpm
XX - Measured values group XXX
required values
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
field X = X° ± MAX XX° (knock sensor X - regulation of advance - cylinder X)
XX - end of communication
if values are not achieved - field X + X + X + X - partial load, full load - check component:
- loose engine parts
- engine
- Fuel (XX oct.)
- knock sensor - line
- knock sensor - tightening torque (XX Nm)
- knock sensor
- knock sensor - connector connections
- cylinder head - height
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.