Honda Bmw 5 Service Manual

Two common  causes of  driveability problems are incorrect 
system voltage  and bad  grounds. 
System voltage 
Digital  motor electronics  (DME) requires that  the system (bat- 
tery) voltage  be maintained  within a narrow range of  DC volt- 
age. 
DC voltage levels beyond or below  the operating  range, 
or any 
AIC voltage  in the  electrical system  can cause havoc. 
When troubleshooting  an illuminated  MIL, make  sure the  bat- 
tery is fully  charged and capable  of delivering  all its power to...

100-6 
( Engine-General 
The main grounds for the fuel  and ignition circuits  of the DME 
system are illustrated below; see 610 Electrical  Component 
Locations  for additional ground  and component locations. 
4 Ground  for engine management system  in right  rear of en- 
gine compartment on  E-box bulkhead  (arrow). 
6-cylinder models: Grounds 
for ignition coils  (arrows) 
4 V-8 models: Grounds  for ignition coils, at cylinders 3 
(arrow)  and 7. 
4 Fuel pump ground  (arrow) below right tail light...

11 0 Engine Removal and installation 
General ........................... .I1 0-2 Engine, Removal and Installation 
........................ Special tools .I 10-2 (V-8 models). ..................... 11 0-1 6 
Engine, Removal and  Installation 
....................... (6-cylinder) .I1 0-3   

I Engine Removal and Installation 
Engine removal and installation are covered in this repail 
group. 
See  100 Engine-General  for engine  identification  details 
and engine  codes. 
Transmission  removal is required for  all models  before the 
engine  can be removed.  This is best  accomplished  with the 
car raised  on an automotive  lift. For additional procedures re- 
quired during  engine removal, refer  to the  following  repair 
groups: 
020  Maintenance 
0 121 Battery,  Alternator,  Starter...

110-3 
Engine Removal and lnstallationl 
Q Fuel line plugs 
(Tool  No. 
BMW 13 5 281 / 13 5 282) 
4 Fuel  line removal  tool 
(Tool  No. 
BMW 16 1 050) 
CAUTION- 
Disconnecting  the battery  may erase  fault code@) storedin 
memoiy Check  for fault  codes  prior to disconnecting  the 
battery  cables. 
If  the  MIL (Malfunction  Indicator Light, also  may be 
called  Check  Engine  or Service Engine  Soon light) 
is illuminated, see 
OBD On-Board Diagnostics  for 
DME  fault code  information. 
It...

11 0-4 
/Engine Removal and Installation 
- Disconnect  negative (-) cable from battery. 
CAUTION-  Prior  to disconnecting  the 
batteg read the battery discon- 
nection cautions 
in 001 General Cautions  and Warnings. 
- Remove engine  hood, or  place in service  position. See 410 
Fenders,  Engine Hood. 
4 Remove left  and right interior ventilation ducts  (lefl side 
shown): 
Release  ventilation filter cover latch  (A) and  remove  cover. 
Release  plastic loclting  tab 
(6) or release locking tabs...

Engine Removal  and lnstallationl 
< Remove positive battery cable and intake manifold  cover: 
Remove protective cover from positive  (+)jump start post 
(4. 
Loosen  and remove battery  lead mounting  nut. 
Remove  lead and  push down through  intake manifold 
Remove  trim covers 
(arrows) from  fuel injector  cover. 
Remove cover  hold down bolts and lift off  cover. 
Working  above engine, disconnect  the following: 
Vent  line from cylinder  head cover  (A). 
M52 engine:  Oxygen  sensor connectors...

. .- - 
I Engine Removal and Installation I 
4 Where applicable,  remove schraedervalve  cap (arrow)  from 
air  connection  on fuel  rail. Using a  tire chuck,  blow fuel back 
through  feed line using a  brief burst  of compressed  air 
(rnax- 
imum of 3 bar or 43.5 psi). 
WARNING - 
Fuel  in fuel line  is under  pressure  (approx. 3 - 5 bar  or 45 - 
75psi) andmay be  expelled  underpressure.  Do not smoke 
or  work near heaters  or other  fire hazards. Keep  a  fire ex- 
tinguisher  handy Before...

Engine Removal and lnstallationl 
NOTE- 
BMW uses three styles of fuel line connections;  a one-time 
single  use clamp,  a locking fitting  that uses  special  tool 
16 1 
050 to release,  and a quick release sleeve (arrow) that dis- 
connects the  line  when depressed. 
WARNING- 
Fuel may be expelled under pressure.  Do not smoke or work 
near  heaters  or other fire  hazards. Keep a fire  extinguisher 
handy  Before disconnecting  fuel hoses, wrap a cloth  around 
fuel hoses  to absorb  any leaking...

110-8 
1 Engine Removal and Installation 
4 M52 TU, M54 engine:  Remove fasteners  (arrows) retaining 
wiring harness conduit  to throttle  body. 
4 M52 TU, M54 engine: Working at throttle housing, rotate har- 
ness  plug (arrow)  counterclockwise  and  remove. 
4 M52 TU, M54 engine:  Disconnect electrical harness connec- 
tor at idle speed control  valve (arrow),  directly above throttle 
valve.