BMW X3 Service & Repair Manual: Instructions for welding work (overload protection of control units)
CAUTION: Follow instructions for body repairs.
When performing welding work on installed control units, to avoid any defects in the electronic control units,
observe the following steps:
- Observe instructions for disconnecting and connecting battery.
-
Detach terminal of battery negative lead from car battery and second battery if fitted. Cover negative
terminal posts.
-
If welding is to be performed near the battery/batteries, first remove battery/batteries from vehicle (flying
sparks - combustion of explosive gas).
-
Fit return clamp on welding unit as close as possible to welding point (maximum distance approx. 1 m).
-
Never connect return clamp to ground pin on body which has ground wires attached!
INSTRUCTIONS ON COMPONENT TESTING
NOTE:
- During all inspections and work on engine electrics and electronics,
always observe safety regulations and accident prevention specifications.
- Always disconnect connectors of control units or components before
checking electric wires.
Testing Aids:
- Schematics, refer to Diagnosis Information System (DIS).
-
Only ever use test lines, adapters, terminals and test tips manufactured by specialists, refer to Diagnosis
Information System, Repair Manual.
-
The inspection values for component testing are located in the Diagnosis Information System (DIS).
- For further technical information, refer to Technical Data.
INSTRUCTIONS FOR CONNECTING AND DISCONNECTING TEST UNITS
When connecting and disconnecting:
- Service Tester
- testing devices
- test leads and
- when replacing control units
it is essential to turn off the ignition!
FOLLOW INSTRUCTIONS FOR REMOVING AND INSTALLING ELECTRONIC CONTROL
UNITS.
Follow operating instructions for testing devices.
Make sure that connected test leads cannot make contact with rotating parts (e.g.: fans, ribbed V-belts, etc.).
General Information
WORKING ON IGNITION SYSTEM
REMOVING AND INSTALLING ELECTRONIC CONTROL UNITS
WELDING WORK (overload protection of control ...
IMPORTANT:
Disconnecting the vehicle battery will cancel the fault memories of control units.
Consequently, before disconnecting the c ...
Other materials:
BMW X3 Service & Repair Manual > Automatic transmission: Screw
Screw Minimum set: Mechanical tools Mechanical tool
NOTE: Ring bolt for removing and installing the E-machine from the transmission bell
housing.
SI number
01 26 11 (763)
Screw Minimum set: Mechanical tools AM
NOTE: (Connection) Banjo bolt M20x1.5 - M18x1.5/For checking the converter
pres ...