Removing and installing engine control unit with no anti-theft protection

Connect vehicle diagnostic tester and carry out “Renewing control unit” in guided functions if engine control unit is to be renewed.

»Carry out the following work sequence«

Removing

• Switch off ignition.
• Release connectors from engine control unit and pull off.

• Press clips -arrows A- outwards and pull engine control unit out to side -B-.

Installing

• Insert new engine control unit and press to left.
• Connect connectors and lock.
• If engine control unit has been renewed, clear learnt values and adapt engine control unit Vehicle diagnostic tester “Guided function”.
• Read event memory, rectify and then erase any faults ⇒ Vehicle diagnostic tester “Guided fault finding”.
• The readiness code must be generated if the event memory has been cleared.
• Perform road test.
• Again read control unit event memory.

9.4 Removing and installing anti-theft engine control unit

Connect vehicle diagnostic tester and carry out “Renewing control unit” in guided functions if engine control unit is to be renewed.

»Carry out the following work sequence«

Removing

• Switch off ignition.

• Open line guide -1- and raise catch -2-.
• Remove engine control unit from its bracket.

• Unscrew shear bolt -1- using pliers.
• Turn engine control unit -2- around and also unscrew second shear bolt using pliers.

• Pull bracket -1- and protective housing -2- off engine control unit -3- in -direction of arrow-.
• Release connectors from engine control unit and pull off.

Installing

• Connect connectors and lock.
• Push protective housing over engine control unit.
• Install protective housing bracket with new shear bolts.
• Evenly tighten shear bolts until bolt heads shear off.

• Insert engine control unit into mounting bracket on bulkhead until it audibly engages in catches -1-.
• Press line into wiring guide -1- and seal.
• If engine control unit has been renewed, clear learnt values and adapt engine control unit Vehicle diagnostic tester “Guided function”.
• Read event memory, rectify any faults and then clear event memory vehicle diagnostic tester “Guided fault finding”.
• The readiness code must be generated if the event memory has been cleared.
• Carry out road test.
• Again read control unit event memory.