A8L V8-4.2L (BFM) (2004)
Valve Body: Procedures
Mechatronics Unit, Removing and Installing
Mechatronics unit, removing and installing
Note:
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Always replace mechatronics unit if it is dirty or faulty
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General repair instructions.
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Observe rules for cleanliness when working on the automatic transmission.
Removing
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Disconnect battery.
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Remove oil pan.
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Remove ATF screen.
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Separate 16-pin connector for transmission connection -B-.
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Touch some grounded part of vehicle with your bare hand to discharge yourself of static electricity.
CAUTION:
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Before touching or removing the mechatronics unit you must first discharge yourself of any static electricity by touching (bare handed) some
grounded metal object (e.g. vehicle, hoist).
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The 16 contacts in connector -B- must not be touched by hand because the control module and mechatronics unit can be damaged by static
electricity.
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Pull off locking clip for wiring harness connector -A-.
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Unscrew retaining bolts for mechatronics unit in reverse order (i.e. first bolt -11-, then -10-, etc. until -1-).
Note:
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Only loosen retaining bolts marked -11- to -1- as indicated in the illustration.
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If other bolts are loosened, this may affect the functioning of the mechatronics unit or it may come apart.