BMW X5: Control Unit Box
REPLACING FAN FOR ELECTRONICS BOX
NOTE: Follow instructions for removing and installing electronic control units.
- Remove control unit.
- Read fault memory. Switch off ignition.
Unclip plug (1).
Remove DDE control unit (3).
Remove relay plug-in (5) towards top.
Release screws (4).
Lift out device carrier (2).
Unfasten plug connection and disconnect.
Release air cowl (1).
Remove electric fan (2) with bracket.
Add final details to vehicle.
Read fault memory.
Additional Fault Notes For Troubleshooting
Necessary preliminary tasks:
- Connect diagnosis system
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Fig. 79: Identifying DIS
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Contents Of Engine Electrical System General
General Information
Working on ignition system
Removing and installing electronic control units
Welding work (overload protection of control units)
Disconnecting and connecting battery
Disconnec
SEE MORE:
Ignition System Diagnosis
The ignition system on modern BMW engines consist of one ignition coil per
cylinder. This arrangement is
known as RZV, or Direct Stationary Ignition. The ignition coil receives fused
power usually from the DME
main relay or IVM (N62).
The ignition coil primary circuit is controlled (triggered) by
Danger Of Poisoning If Oil Is Ingested/Absorbed Through The Skin
Danger of poisoning!
Ingesting oil or absorbing through the skin may cause poisoning!
Possible symptoms are:
Headaches
Dizziness
Stomach aches
Vomiting
Diarrhoea
Cramps/fits
Unconsciousness
Protective measures/rules of conduct:
Pour oil only into appropriately marked containers
Do not po
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