8 minute read
6.2 Removing and installing engine control unit J623 with protective housing
– Release catch -arrow- and disconnect vacuum hose -1-.
– If present, remove drain hose -1-; to do so, turn gently in -direction of arrow- -A- and remove down in -direction of arrow- -B-.
Version A
– Unplug electrical connector -1-. – Release fasteners -arrows-, remove intake manifold sender GX9- .
Version B
– Unplug electrical connector -1-. – Unscrew bolts -2-, and remove intake manifold sender - GX9- .
Installing Install in reverse order of removal, observing the following:
Note
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by SEAT S.A.
♦ Renew O-ring. ♦ If fasteners on the intake manifold have broken off, secure the intake manifold sender - GX9- using suitable bolts -2- as per ⇒ Electronic Parts Catalogue (ETKA)
Specified torques ♦ ⇒ “3.1 Assembly overview - air filter housing”, page 393 ♦ ⇒ “4.1 Assembly overview - intake manifold”, page 399
Special tools and workshop equipment required ♦ Socket 24 mm - T40284-
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with ♦ Torque wrench - V.A.G 1331- respect to the correctness of information in this document. Copyright by SEAT S.A.
♦ Ratchet wrench - V.A.G 1331/1-
Removing – Remove air pipe ⇒ “2.5 Removing and installing air pipe ”, page 368 .
– Pull off connector -1-.
– Use socket, 24 mm - T40284- to unscrew exhaust gas pres‐sure sensor 1 - G450- -2-.
Installing Install in reverse order of removal, observing the following:
Note
♦ Renew exhaust gas pressure sensor 1 - G450- after removal. ♦ Before installing the exhaust gas pressure sensor 1 - G450- , check hole in camshaft housing for soiling.
– Install air pipe ⇒ “2.5 Removing and installing air pipe ”, page 368 . Specified torques: ♦ ⇒ “1.2 Assembly overview - camshaft housing”, page 160
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by SEAT S.A.
6 Engine (motor) control unit
⇒ “6.1 Removing and installing engine control unit J623 ”, page 412 ⇒ “6.2 Removing and installing engine control unit J623 with pro‐tective housing”, page 415 ⇒ “6.3 Assembly overview - engine (motor) control unit”, page 422
⇒ “6.1.1 Removing and installing engine control unit J623 , Ateca, Leon 2013”, page 412 ⇒ “6.1.2 Removing and installing engine control unit J623 , Ibiza 2018, Arona”, page 413 ⇒ “6.1.3 Removing and installing engine control unit J623 , Toledo 2013, Ibiza 2016”, page 414
Special tools and workshop equipment required ♦ Vehicle diagnostic tester Removing
Note
♦ If the engine control unit - J623- needs to be renewed, connect ⇒ Vehicle diagnostic tester and perform “Guided functions, Renewing engine control unit”. ♦ If renewed, the engine control unit - J623- must be adapted to the electronic immobilizer ⇒ Vehicle diagnostic tester “Guided functions”.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with– Switch off ignition and remove key from ignition lock. respect to the correctness of information in this document. Copyright by SEAT S.A.
Note
Contact between the positive battery terminal and the engine control unit will cause engine control unit damage. For this rea‐son, the battery always needs to be disconnected prior to remov‐ing the engine control unit from its bracket ⇒ Electrical system; Rep. gr. 27 ; Battery; Disconnecting and connecting battery .
– Unlock latches -in the direction of the arrow- and remove from engine control unit - J623- . – Release and pull off connectors for engine (motor) control unit - J623- .
– Remove engine control unit. Installing Installation is in the reverse sequence of removal. Observe the following: – Connect battery ⇒ Electrical system; Rep. gr. 27 ; Battery; Disconnecting and connecting battery . After having installed the new engine control unit, the following work must be carried out:
– Connect vehicle diagnostic tester . – Switch on ignition and select the following menu options on vehicle diagnostic and service information system :
♦ 01 - Engine electronics
♦ Guided Functions
♦ 01 - Renew engine/motor control unit
Special tools and workshop equipment required ♦ Vehicle diagnostic tester Removing
Note
♦ If the engine control unit - J623- needs to be renewed, connect ⇒ Vehicle diagnostic tester and perform “Guided functions, Renewing engine control unit”. Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with ♦ respect to the correctness of information in this document. Copyright by SEAT S.A.If renewed, the engine control unit - J623- must be adapted to the electronic immobilizer ⇒ Vehicle diagnostic tester “Guided functions”.
– Switch off ignition and remove key from ignition lock.
Note
Contact between the positive battery terminal and the engine control unit will cause engine control unit damage. For this rea‐son, the battery always needs to be disconnected prior to remov‐ing the engine control unit from its bracket ⇒ Electrical system; Rep. gr. 27 ; Battery; Disconnecting and connecting battery .
– Release catches in direction of -arrow- and remove engine control unit - J623- -1-.
– Release and pull off connectors -2- for engine control unit J623- .
– Remove engine control unit -1-. Installing Install in reverse order of removal, observing the following: – Connect battery ⇒ Electrical system; Rep. gr. 27 ; Battery; Disconnecting and connecting battery . After having installed the new engine control unit, the following work must be carried out:
– Connect vehicle diagnostic tester ⇒ Maintenance ; Booklet KJ1 ; General; Connecting vehicle diagnostic tester . – Switch on ignition and select the following menu options on vehicle diagnostic tester :
♦ 01 - Renew engine/motor control unit
Removing – If engine control unit is renewed, select 0001 - Renew engine control unit function in ⇒ Vehicle diagnostic tester.
– Switch off ignition.
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by SEAT S.A.Note
♦ If the engine (motor) control unit comes into contact with the positive battery terminal, permanent damage to the engine (motor) control unit will be the consequence. ♦ Therefore, disconnect the battery before removing the engine control unit ⇒ Electrical system; Rep. gr. 27 ; Battery; Dis‐connecting and connecting battery .
– Disconnect battery ⇒ Electrical system; Rep. gr. 27 ; Battery; Disconnecting and reconnecting battery . – Release catches of holder -1- from engine control unit - J623- . – Press down tab -2-, and remove engine control unit - J623upwards. Engine control unit with protective housing – Disconnect engine control unit from protective housing ⇒ “6.2.3 Detach engine control unit J623 from safety housing, Toledo 2013, Ibiza 2016”, page 421 . All versions
– Using a screwdriver, lever out locking bar -1- of upper wiring harness in -direction of arrow-.
– Using a screwdriver, lever out locking bar -2- of lower wiring harness in -direction of arrow-.
– Pull connectors off engine control unit. – Remove engine control unit. Installing Installation is in the reverse sequence of removal. Observe the following: Engine control unit with protective housing – Secure engine control unit in protective housing. ⇒ “6.2.3 Detach engine control unit J623 from safety housing, Toledo 2013, Ibiza 2016”, page 421 After installing a new engine control unit, the following operations must be performed: – Connect ⇒ Vehicle diagnostic tester. – Switch on ignition, and select and carry out following menu options on ⇒ Vehicle diagnostic tester:
♦ 0001 - Renew engine (motor) control unit
♦ 0001 - Adapt new engine control unit to immobiliser
⇒ “6.2.1 Removing and installing the engine control unit J623 with anti-theft coding, Ateca, Leon 2013”, page 415 ⇒ “6.2.2 Removing and installing engine/motor control unit J623 Protected by copyright. Copying for private or commercial purposes, in part or in whole, is notwith anti-theft coding, Ibiza 2018, Arona”, page 418 permitted unless authorised by SEAT S.A. SEAT S.A does not guarantee or accept any liability with respect to the correctness of information in this document. Copyright by SEAT S.A. ⇒ “6.2.3 Detach engine control unit J623 from safety housing, Toledo 2013, Ibiza 2016”, page 421
Special tools and workshop equipment required ♦ Wiring harness repair kit - VAS 1978 B-
