Air/Fuel Mixture: Testing and Inspection

Acceleration, full throttle enrichment and fuel deceleration shut off, checking

Requirement
- VAG 1551 Scan Tool connected

- start engine and let Idle
- press 1 button to select operating mode "Rapid Data Transfer"
- display will appear as shown





- press 0 and 1 buttons to select address word "Engine Electronics"
- display will appear as shown





- press Q button to enter input
- press => button
- press 0 and 8 buttons to select 08 "Read test value block"
- press Q button to enter input
- display will appear as shown





- press 0 and 4 buttons to select display group 04
- display will appear as shown





- press Q button to enter input
- display will appear as shown





- continue with checking only if engine coolant temperature exceeds 80°C (176°F)
- let engine idle for approx. 2 minutes
- observe display value in field 4
- display value must be 00010 at idle

- raise engine speed to approx. 3000 RPM using accelerator pedal
- display value must be 10100 (briefly)

- release accelerator pedal
- display value must be 00011 (briefly) and then become 00010 at idle

- press => button
- press 0 and 6 buttons to select function 06 "Ending output"
- display will appear as shown





- press Q button to enter input





It specified values not obtained
- check TP (Throttle Position Sensor) Testing and Inspection