Check Injection Units; Adjust The Correction Values For Injection Units; Check Injection Unit Return Quantity With Engine Running - Skoda Octavia III 2013 Workshop Manual

Octavia III 2013 ➤ , Octavia III 2014 ➤
1.6/66; 77; 81; 2.0/105; 110; 135 kW TDI CR engine - Edition 07.2014
2.3

Check injection units

There are 3 ways to check the injection units.
♦ ⇒ "2.4 Adjust the correction values for injection units",
page 326
♦ ⇒ "2.5 Check injection unit return quantity with engine run‐
ning", page 326
♦ ⇒ "2.6 Check injection unit return flow quantity at starter
speed", page 329
2.4 Adjust the correction values for injection
units
♦ The "injector quantity adjustment (IQA)" functionality has the
task of correcting the injection quantity individually for each
cylinder of a common rail system in the entire map range.
♦ The 7-digit adjustment values are printed on each injection
unit. The printed values may be letters and/or digits.
View from the top of the injection unit
1 - Adjustment value (checksum; information in the image is
only an example)
2 - Data Matrix Code
3 - Part number
♦ After replacement of an injection unit the adjustment value
must be written to the engine control unit.
♦ After replacement of the engine control unit the "injection unit
adjustment values" must be transferred to the new engine
control unit.
♦ In addition, check all other "injector quantity adjustment (IQA)"
injection units to ensure that all values have been entered cor‐
rectly. If the correct values are stored in the engine control unit,
these values must never be entered again.
♦ The work procedure for the adaptation is described in the
"Targeted fault finding". (The work sequence is also described
in "Targeted Functions".) ⇒ Vehicle diagnostic tester.
2.5 Check injection unit return quantity with
engine running
A - Check return quantity of all injection units
Special tools and workshop equipment required
♦ Measuring vessel, fuel test
326
Rep. gr.23 - Mixture preparation - injection