WARNING
System is pressurised.
The “7-speed dual clutch gearbox 0CJ, 0CK, 0CL” is equipped
with an electric ATF pump and hydraulic accumulator.
The electric ATF pump may start up at any time.
Because of the hydraulic accumulator, the ATF system is pres‐
surised even when the ignition is off.
♦ The electric ATF pump must always be deactivated and
the hydraulic accumulator must be discharged before
opening the gearbox.
♦ If the current state of the system is unclear (e.g. if the
gearbox control unit is defective or if the gearbox is from
an unknown source), only loosen the bolts on the mecha‐
tronic unit very slightly so that the oil pressure in the
accumulator can dissipate slowly.
♦ Unplug electrical connector on automatic gearbox control
unit - J217- before removing oil pan.
♦ Put on safety goggles.
Deactivating ATF pump and discharging hydraulic accumulator
– Connect Vehicle diagnostic tester and start Diagnosis mode.
♦ Select own test
♦ 02 - Gearbox electronics, Functions
♦ Select 02 - ATF pressure relief / Disable ATF pump
or 02 - ATF level ⇒ Drain off ATF
4.4 Contact corrosion
Contact corrosion can occur if unsuitable fasteners are used (e.g.
bolts, nuts, washers, etc.).
For this reason, only fasteners with a special surface coating are
fitted.
Rubber or plastic parts and adhesives also consist of non-con‐
ductive materials.
If you are not sure whether used parts can be re-installed, always
fit new parts ⇒ Electronic parts catalogue .
Please note:
♦ We recommend using only genuine replacement parts; these
have been tested and are compatible with aluminium.
♦ We recommend the use of accessories approved by Audi.
♦ Damage caused by contact corrosion is not covered by war‐
ranty.
4.5 Safety functions of gearbox control unit
In the event of a failure of one or more components/sensors, the
gearbox control unit will activate appropriate backup functions.
This ensures that the gearbox will not be damaged, however, the
function and quality of the gear shifts will be impaired.
Faults detected by the gearbox are classified in four different cat‐
egories.
Audi A4 2015 ➤ , Audi A4 Avant 2015 ➤ , Audi A4 China 2016 ➤ , Audi A4 a ...
7-speed dual clutch gearbox 0CJ, 0CK, 0CL, 0DN, 0DP - Edition 08.2018
8 Rep. gr.00 - Technical data
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