Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
6
Engine control unit
⇒ a6.2 nd installing engine (motor) control unitJ623 with protec‐
tive housing”, page 477
6.1
Removing and installing engine control
unit -J623-
⇒ a6.1.2 nd installing engine control unitJ623, Sharan”, page
474
6.1.1
Removing and installing engine control
unit -J623-, Golf, Passat, Touran, Ti‐
guan, Arteon
Special tools and workshop equipment required
♦ Vehicle diagnostic tester
Removing
– If the engine control unit is to be renewed, switch on ignition,
and select the following menu options on vehicle diagnostic
tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
– Switch off ignition and remove ignition key.
Note
If the engine (motor) control unit comes into contact with the
positive battery terminal, permanent damage to the engine (mo‐
tor) control unit will be the consequence. For this reason, the
battery always needs to be disconnected prior to removing the
engine control unit from its bracket ⇒ Electrical system; Rep.
gr. 27; Battery; Disconnecting and connecting battery.
– Release fastener -arrow A-, and remove engine control unit
-J623- -arrow B-.
– Release and pull off connectors for engine (motor) control
unit -J623-.
6. Engine control unit
473
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
Installing
Install in reverse order of removal, observing the following:
– Insert lower edge of engine control unit -J623- into bracket
-arrow A-, and engage engine control unit in bracket at up‐
per edge.
•
When doing this, ensure that lugs of engine control unit en‐
gage in notches at top and bottom of bracket -arrows B-.
– Connect battery ⇒ Electrical system; Rep. gr. 27; Battery;
Disconnecting and connecting battery.
After a new engine (motor) control unit has been installed, the
following work procedure must be carried out:
– Switch on ignition, and select following menu option on vehi‐
cle diagnostic tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
6.1.2
Removing and installing engine control
unit -J623-, Sharan
Note
Removing and installing anti-theft engine control unit ⇒ page
480 .
Removing
– If the engine control unit is to be renewed, switch on ignition,
and select the following menu option on vehicle diagnostic
tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
– Switch off ignition and remove key from ignition lock.
– Remove windscreen wiper arms: ⇒ Electrical system; Rep.
gr. 92; Windscreen wiper system; Removing and installing
windscreen wiper arms.
474
Rep. gr.24 - Mixture preparation - injection
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
– Remove plenum chamber cover ⇒ General body repairs,
exterior; Rep. gr. 50; Bulkhead; Assembly overview - plenum
chamber cover.
– Remove plenum chamber bulkhead ⇒ General body repairs,
exterior; Rep. gr. 50; Bulkhead; Assembly overview - bulk‐
head.
– Pull seal together with engine wiring harness upwards in
-direction of arrow- out of cable guide.
– If fitted, unclip cover -1- at sides from mountings -2-
-arrows-, and remove it.
– Push guides -2- outwards.
– Remove engine control unit -1- upwards.
– Slide connector locking devices -1- on engine control unit in
-direction of arrow- and pull off both connectors.
6. Engine control unit
475
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
Installing:
– Attach connectors to engine control unit and slide locking
devices inwards until they engage.
– Push engine control unit -1- into side guides -2- in the
-direction of arrow-.
– Install plenum chamber bulkhead ⇒ General body repairs,
exterior; Rep. gr. 50; Bulkhead; Assembly overview - bulk‐
head.
– Install plenum chamber cover ⇒ General body repairs, ex‐
terior; Rep. gr. 50; Plenum chamber bulkhead; Assembly
overview - plenum chamber cover.
– Wiper arms ⇒ Electrical system; Rep. gr. 92; Windscreen
wiper system; Removing and installing wiper arms.
After a new engine (motor) control unit has been installed, the
following work procedure must be carried out:
– Switch on ignition, and select following menu option on vehi‐
cle diagnostic tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
476
Rep. gr.24 - Mixture preparation - injection
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
6.2
Removing and installing engine (mo‐
tor) control unit -J623- with protective
housing
⇒ a6.2.2 nd installing engine control unitJ623 with protective
housing, Sharan”, page 480
6.2.1
Removing and installing engine con‐
trol unit -J623- with protective housing,
Golf, Passat, Touran, Tiguan, Arteon
Special tools and workshop equipment required
♦ Hot air blower -VAS 1978/14A- with nozzle attachment from
wiring harness repair set -VAS 1978 B-
♦ Small grinder with cutting disc, commercially available
♦ Vehicle diagnostic tester
Removing
– If the engine control unit is to be renewed, switch on ignition,
and select the following menu option on vehicle diagnostic
tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
– Switch off ignition and remove key from ignition lock.
Note
If the engine (motor) control unit comes into contact with the
positive battery terminal, permanent damage to the engine (mo‐
tor) control unit will be the consequence. For this reason, the
battery always needs to be disconnected prior to removing the
engine control unit from its bracket ⇒ Electrical system; Rep.
gr. 27; Battery; Disconnecting and connecting battery.
To remove protective housing -1-, unscrew shear bolts -arrows-
as follows:
6. Engine control unit
477
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
– Make groove (for a screwdriver) in head of shear bolt -1-
using a small grinder -2-.
Note
The threads of the shear bolts are secured with locking fluid. To
unscrew these bolts, the threads must therefore be heated with
the hot air blower.
– Select settings on hot air blower as shown in illustration, i.e.
set temperature potentiometer -2- to maximum heat output
and two-stage air flow switch -3- to position 3.
NOTICE
Risk of damage to adjacent components caused by hot air
blower. Risk of overheating.
– If necessary, cover adjacent components.
– Heat head of shear bolt -1- for approx. 20 to 30 seconds.
478
Rep. gr.24 - Mixture preparation - injection
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
– Unscrew shear bolt -1- with screwdriver -2-.
– Remove protective housing from engine (motor) control unit
-J623-.
– Release fastener -arrow A-, and remove engine control unit
-J623- -arrow B-.
– Release and pull off connectors for engine (motor) control
unit -J623-.
6. Engine control unit
479
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
Installing
Install in reverse order of removal, observing the following:
– Insert lower edge of engine control unit -J623- into bracket
-arrow A-, and engage engine control unit in bracket at up‐
per edge.
– It is essential that the engine (motor) control unit -J623- be
provided with the protective housing again.
– Clean the threaded holes for the shear bolts of thread-lock‐
ing agent residues. A thread chaser is suitable for cleaning.
– Always use new shear bolts.
– Connect battery ⇒ Electrical system; Rep. gr. 27; Battery;
Disconnecting and connecting battery.
After a new engine (motor) control unit has been installed, the
following work procedure must be carried out:
– Switch on ignition, and select following menu option on vehi‐
cle diagnostic tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
6.2.2
Removing and installing engine con‐
trol unit -J623- with protective housing,
Sharan
Special tools and workshop equipment required
480
Rep. gr.24 - Mixture preparation - injection
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
♦ Hot air blower -VAS 1978/14A- with nozzle attachment from
wiring harness repair set -VAS 1978 B-
♦ Small grinder with cutting disc, commercially available
♦ Vehicle diagnostic tester
Note
The shear-head bolt threads may coated with locking com‐
pound. To simplify removal, the shear-head bolts can be heated
using hot air blower -VAS 1978/14-. When doing this, ensure
that no adjacent cables, connectors or components are dam‐
aged!
Removing
– If the engine control unit is to be renewed, switch on ignition,
and select the following menu option on vehicle diagnostic
tester:
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
– Switch off ignition and remove key from ignition lock.
– Remove windscreen wiper arms: ⇒ Electrical system; Rep.
gr. 92; Windscreen wiper system; Removing and installing
windscreen wiper arms.
– Remove plenum chamber cover ⇒ General body repairs,
exterior; Rep. gr. 50; Bulkhead; Removing and installing ple‐
num chamber cover.
– Remove plenum chamber bulkhead ⇒ General body repairs,
exterior; Rep. gr. 50; Bulkhead; Removing and installing ple‐
num chamber bulkhead.
– Pull seal together with engine wiring harness upwards in
-direction of arrow- out of cable guide.
6. Engine control unit
481
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
– If fitted, unclip cover -1- at sides from mountings -2-
-arrows-, and remove it.
– Push guides -2- aside.
– Remove engine control unit -1- upwards.
– Bend upwardly projecting tabs -1- of locking bar outwards.
– Make groove (for a screwdriver) in head of shear bolt -1-
using a small grinder -2-.
482
Rep. gr.24 - Mixture preparation - injection
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
Note
The threads of the shear bolts are secured with locking fluid. To
unscrew these bolts, the threads must therefore be heated with
the hot air blower.
Set hot air blower as shown in illustration.
•
Turn potentiometer for temperature adjustment -2- to maxi‐
mum heater output
•
Two-stage switch for air flow rate -3- set to position 3.
Note
♦ Risk of damage to adjacent components caused by hot air
blower. Risk of overheating.
♦ If necessary, cover adjacent components.
– Heat head of shear bolt -1- for approx. 20 to 30 seconds.
6. Engine control unit
483
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
– Unscrew shear bolt -1- with screwdriver -2-.
– Slide connector locking devices -1- on engine control unit in
-direction of arrow- and pull off both connectors.
Installing:
– Attach connectors to engine control unit and slide locking
devices inwards until they engage.
– Screw on a new locking bar -3- with new shear-head bolts
-2- and tighten bolts uniformly until just before heads shear
off.
Disregard item -1-.
– Push engine control unit -1- into side guides -2- in the
-direction of arrow-.
484
Rep. gr.24 - Mixture preparation - injection
Arteon 2018 ➤, Arteon 2021 ➤, Arteon Shooting Brake 2021 ➤, Golf 2013 ➤, Golf 2 ...
4-cyl. direct injection engine (1.8 l and 2.0 l, 4 V, EA 888 gen III, turbocharger, chain drive) - Edition
02.2021
– Install plenum chamber bulkhead ⇒ General body repairs,
exterior; Rep. gr. 50; Plenum chamber bulkhead; Removing
and installing plenum chamber bulkhead.
– Install plenum chamber cover ⇒ General body repairs, exte‐
rior; Rep. gr. 50; Plenum chamber bulkhead; Removing and
installing plenum chamber cover.
– Wiper arms ⇒ Electrical system; Rep. gr. 92; Windscreen
wiper system; Removing and installing wiper arms.
After a new engine (motor) control unit has been installed, the
following work procedure must be carried out:
– Connect ⇒ Vehicle diagnostic tester, and select following
functions.
♦ 0001 - Engine electronics, functions
♦ 0001 - Renew engine control unit
6. Engine control unit
485
2024 VW Tiguan Owner's Manual
