BMW X5: Troubleshooting
- Contents Of Engine Electrical System General
- Instructions For Removing And Installing Electronic Control Units
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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
Instructions For Removing And Installing Electronic Control Units
IMPORTANT:
Disconnecting the vehicle battery will cancel the fault memories
of control
units. Consequently, before disconnecting the car's battery, always
interrogate the fault memories. Invest
Ignition Wires, Spark Plugs
FIRING ORDER
Fig. 3: Firing Order (V8)
REPLACING ALL SPARK PLUGS (N62, N62TU)
Special tools required:
12 1 171
12 1 172
Necessary preliminary tasks:
Switch off ignition
Remove all IGNITION CO
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Removing And Installing/Replacing Thermostat Cartridge (N62TU/N52K)
IMPORTANT: Danger of scalding!
Only perform this work after engine has cooled down.
Necessary preliminary tasks:
Follow instructions for working on cooling system.
Draining coolant.
Remove fan cowl.
Unlock and detach coolant hose (1).
Release nuts and remove thermostat cartridge (2).
Install
AGM Battery
Fig. 151: Identifying AGM Battery
Introduction
In September 2002 so-called VRLA batteries, better known as AGM batteries ,
were introduced.
(VRLA stands for Valve Regulated Lead Acid, i.e. lead acid battery with pressure
relief valve; AGM stands for
A bsorbent G lass M at, i.e. absorbent glass f
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