Honda Bmw 5 Service Manual

ignition System 
Crankshaft speed sensor, replacing (M62 and M62TU 
engines) 
The  crankshaft  speed sensor reads a  toothed pulse wheel 
mounted on the  flywheel. 
If the Engine Control Module(ECM) 
does not receive an impulse  signal from  the crankshaft  speed 
sensor during 
cranking, the engine will  not start.  If the  OBD II 
system  misfire detection protocol detects  a catalyst damag- 
ing  fault  due to a  malfunction in the  crankshaft speed sensor 
components,  the Check Engine light...

I Ignition System 
Camshaft position sensors 
The camshaft position sensors are used by the englne man- 
agement system  for VANOS control,  sequential fuel injection 
and knock  control. 
Intake  camshaft  position sensor, replacing 
(M52,M52 TU 
and M54  engines) 
- Make certain ignition has been turned  off. 
- Remove plastic cover from  above  fuel injectors by prying  off 
bolt covers  and removing  cover mounting bolts. 
Remove  complete air filter  housing: 
Disconnect electrical harness...

120-15 
Ignition system1 
Exhaust camshaft position sensor, replacing 
(M52 TU and M54 engines) 
- Make sure ignition has been turned  off. 
4 Working at front of engine on exhaust (right) side,  detach ex- 
haust camshaft position sensor electrical harness  connector 
(arrow)  and remove sensor. 
- Installation  is reverse  of removal, noting  the following: 
Use a new O-ring  when installing  sensor. 
- Use scan tool to  read  out and clear ECM fault  memory. 
Tightening  torque 
Exhaust camshaft...

120-1 6 
Ignition System 
Remove camshaft  sensor (arrow)  from front  of right cylinder 
head. 
Disconnect camshaft sensor harness  from cable duct above 
right cylinder  head. 
Installation is reverse  of removal,  noting the  following: 
Use  new  O-ring  when  installing  sensor. 
Be  sure wiring  is rerouted  in same orientation. 
Use scan  tool to read  out and  clear ECM fault memory. 
Tightening torque  Intake camshaft  sensor to timing  chain  5 Nm 
(3.5 ft-lb) 
cover 
Knock sensors 
Knock...

Ignition System 
Remove intake manifold  as described in 113 Cylinder Head 
Remaval and  Installation. 
Remove  knock sensor mounting bolts  (arrows) on side  of 
cylinder  block. Remove  sensors. 
I CAUTION- I 
Note the installedangle  of the  knock sensors  on the bloclt be- 
fore  removalit.  Reinstall the sensors  in the  same  position.  Be 
sure  to use 
a torque  wrench  when  tightening the sensor 
mounting  bolts. 
Clean 
lknoclc sensor contact  surfaces on engine bloclc and 
sensors before...

121-1 
121 Battery. Starter. Alternator 
General ........................... .I2 1.2 
Special tools ........................ .I2 1.2 
Engine electrical system ............... .I2 1.2 
Battery Safety Terminal ............... .I2 1.3 
Warnings and cautions ................. 121 -4 
Battery ............................ 121-5 
Battery testing ...................... .I2 1.5 
Hydrometer testing ................... .I2 1.5 
Battery open-circuit voltage test ......... .I2 1.6 
Battery load voltage test...

- - 
Battery, Starter, Alternator 
This section covers the battery, alternator, starter and associ- 
ated components  of the electrical  system. 
Troubleshooting information 
forthese components isfound in 
Table  a. Battery, alternator  and starter  troubleshooting. 
For additional electrical troubleshooting information,  see 
600 Electrical System-General. 
Special tools 
4 Automotive digital multimeter 
CAUTION- 
Only use a digital  multirneter  when testing  automotive  electri- I) cal components....

Battery, Starter, ~lternatorl 
@ TO fuse & relay panel Battery Safety Terminal 
A Battery Safety Terminal (BST) controlled  by the Multiple 
Restraint  System (MRS) control  unit was introduced  for mod- 
el  year  1998 
vehicles. The system  will disconnect  electrical 
power  to the  engine compartment 
in the event of  a significant 
impact.  The MRS  system  fires an encapsulated pyrotechnic 
device 
in the  positive (+) battery terminal that disconnects 
power  to the  engine  compartment,  but...

.-. . 
Battery, Starter, Alternator 
Warnings  and cautions 
WARNING - 
Wear goggles,  rubber gloves,  and a rubber  apron  when 
working  around the  battery or battery acid  (electrolyte). 
Battery acid contains sulfuric acid and can  cause skin 
irritation and burning. 
If acid is  spilled  on your  skin or 
clothing,  flush the area at once  with large quantities  of 
water. If  electrolyte gets  into your eyes, flush them  with 
large  quantities of  clean water for several minutes  and 
call  a...