Display Group 007
Display Group 007 Overview:
Display Overview
Display Groups 007 & 008, Test Table, Display Fields 1, 2, 3, & 4:
Test Table
Notes on display field 1:
^ O2S control should only be evaluated after successful learning (see learning requirement display), both in Basic Setting function 04 and in 'Read Measuring Value Block function 08.
^ O2S control displays the momentary control status. After successful learning (see learning requirement display), the values varyaround0.0j a0%. If the learning process (displayfield4) is ended and no value around ~3 volts has been reached, observe display group 010, display fields 3 and/or 4 and check the control behavior of the two O2S. The display values must at times drop below the value 0.3 volts and exceed ~6 volts. Otherwise, check the O2S heater and O2S probe
^ O2S control stop evaluation carried out by diagnosis also proceeds only after successful learning - see learning requirement display: control stop max.: +29%; control stop min.: -60%
^ If values exceed +20% in "Basic Setting' function 04, air leaks and engine damage (oil burning due to piston damage) are possible.
Notes on display field 2:
Corresponding to the learning range momentarily used for driving (display field 3), the momentarily used 02S learning value (display group 005, display fields 1/213/4 and/or display group 006, display fields 1/2/3/4) is displayed. If a0% is displayed as the momentarily used Q2S learning value, read the DTC memory for possible 02S related malfunctions.
Notes on display field 3, Learning Range:
Explanation Of Display Field 3:
^ Only closed throttle position and partial load learning ranges are displayed since ~ learning takes place at wide Open Throttle (WOT).
^ To obtain the appropriate learning range (load status) you must perform the following steps.
^ Start engine and let idle (must be between 700 and 900 RPM).
^ For partial loads 1, 2, and 3: test drive vehicle using a second person. Increase the engine speed from 1500 to 3000 RPM while simultaneously loading the engine by lightly applying the brake pedal
Notes on display field 4, Learning Requirement:
Explanation Of Display Field 4:
Display shows in what learning range (display field 3) learning requirement is needed.
Requirement for learning:
^ No malfunctions stored in DTC memory
^ Engine speed must be between 700-800 RPM or 1500-3000 RPM
^ Engine coolant temperature must be between 80°-105°C (176°-221 °F) (if learning does not start immediately after this requirement is met, depress the accelerator pedal)
Learning is prohibited IF:
^ Idle speed (RPM) is uneven (hunting), during accelerations and with wide open throttle
^ Malfunctions are stored in the DTC memory (does not apply to sporadic malfunctions)
^ If a 9% difference is present between the richest and leanest 02S learning values of one display group. If a 9% difference is reached, the continued learning of both affected learning ranges is adjusted. The learning requirement display of these learning ranges can then not be 1 ~ display groups 005 and 006.
Learning starts 20 seconds after initiating "Basic Setting" function 04 and/or 2 to 4 minutes after each start
The following key shows when the requirement for new learning (learning requirement) is forced:
^ After initiation of "Basic Setting" function 04 with VAG 1551, all learning requirement displays are set to 0 in order to force new learning of all 025 learning values after shop visits
^ After each start with Engine Coolant Temperature (ECT) less than 40°C (104°F), learning requirement is forced in all learning ranges
^ After each start with ECT greater than 40°C (104°F), learning requirement is forced only in idle
^ If there is a large learning value deviation (from stored learned value to the newly learned value) in one learning range during the learning process, all learning requirement displays are set to 0 again.
With successful learning, the learning requirement values of the respective learning ranges (display field 3) are set to 1.