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Fuse Locations in Power Distribution Box / Relay Box : Layout Of Front Power Distribution Box Door Lock – Fuel Injector Fuel Injector – Ignition Coil Park Heating – Seat Lumber Seat Lumber – Trunk Lock 1990 BMW 750iL (E32/2) V12-4988cc 5.0L SOHC (M70) Vehicle Level Locations Fuse and Fusible Link Locations

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1. Use a scan tool to monitor the fuel trim numbers and the Mass Air Flow (MAF) sensor data stream grams/sec readings. Nominal
values are 5 grams/sec at idle in Park, and >150 at Wide Open Throttle (WOT) and 5000 RPM, in gear. Some scan tools have a freeze frame feature, which is useful in trouble shooting if the problem is set at idle versus at cruise. Vacuum leaks and crankcase breather problems generally show up at idle. Voltage at the airflow meter should be .7-.9V at idle and increase from there with more airflow. 2. Monitor the crankcase vacuum with a vacuum gauge, which can be adapted onto the tube for the oil dipstick. Specification for the crank case vacuum is 8 to 15 millibar, this equals about 1/4 to 1/2 PSI or pounds per square. So, 1 PSI of vacuum would be twice as much as there should be at idle. The proper method, per BMW, is to use a slack tube manometer which can be made easily with clear tubing and making it into a U shape and have it marked in inch increments then half fill it with water. When crankcase vacuum is applied to one side of the tubing it should displace 4 to 6 inches of water if the crankcase breather is working correctly. 3. Monitor the fuel pressure. It should be a constant 50 – 53 PSI.

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Layout Of Rear Power Distribution Box Fuse Assignments : Fuse Assignments: 1 To 4 Door Lock – Fuel Injector Fuel Injector – Ignition Coil Ignition Coil – Park Brake Park Heating – Seat Lumber Seat Lumber – Trunk Lock Underhood – Wiper Component Index
Notes
ABS – Catalyst Catalyst – Door Lock

Comprehensive, single source of service information and specifications available specifically for BMW 5 Series from 1997 to 2002. The aim throughout this manual has been simplicity, clarity and completeness, with practical explanations, step-by-step procedures and accurate specifications. Whether you are a professional or a do-it-yourself BMW owner, this manual will help you understand, care for and repair your E39 5 Series. Though the do-it-yourself BMW owner will find this manual indispensable as a source of detailed maintenance and repair information, the BMW owner who has no intention of working on his or her car will find that reading and owning this manual will make it possible to discuss repairs more intelligently with a professional technician.
Engines covered in this BMW repair manual:
* 6-cylinder engines: M52, M52 TU, M54
* V-8 engines: M62, M62 TU
Fuel injection systems covered in this BMW repair manual:
* Bosch M 5.2, M 5.2.1, ME 7.2
* Siemens MS 41.0, MS 42.0, MS 43.0
Manual transmissions covered in this BMW repair manual:
* Getrag S5D 250G, S6S 420G
* ZF S5D 320Z
Automatic transmissions covered in this BMW repair manual:
* A4S 270R, A4S 310R
* A5S 360R, A5S 390R
* A5S 325Z
*A5S 560Z, A5S 440Z

BMW 5-Series (E28) cars from 1982-1988. Whether you’re a professional technician or a do-it-yourself BMW owner, this manual will help you understand, maintain, and repair systems on 5-Series cars.
BMW E28 Models and engines covered in this BMW repair manual:
* 528e
(B27, 2.7 liter)
* 533i
(B32, 3.2 liter)
* 535i
(B34, 3.5 liter)
*535is
(B34, 3.5 liter)
BMW E28 Transmissions covered in this BMW repair manual:
* Getrag 260
(with integral bellhousing)
*Getrag 265
(with removable bellhousing)