Honda Bmw 5 Service Manual

Fuel lniection 1 
Table b. Siemens MS 41.1 ECM pin assignments  (continued) 
Pin 
lSiqnal 1 Componentlfunction / Notes I - I I 
40 1 ground  /Crankshaft position sensor /crankshaft position sensor control I - I I 
41 1 ground /Camshaft position sensor (CMP) /shielding for CMP sensor I - I I 
42 1 ground I~hrottie position sensor (TPS) /TPS ground 
43 
44 
45 
46 
47 
48 
49 
50 
51  ground 
output 
output 
output 
outout 
I I I 
input 
52  53 
54 
55 
56  57 
58 
59 
60 
61 
62 
63 
64 
65 
66  Camshaft...

/Fuel injection 
Table  b. Siemens  MS 41.1 ECM pin assignments (continued) 
85 
86 
87 
88 CAN-Bus low 
CAN-Bus  high 
Power supply 
Diagnostic connector 
(TxD) 
inputloutput 
inpuWoutput 
input 
input output  Automatic transmission control module (AGS) 
Automatic transmission control module (AGS) 
Battery voltage from main relay terminal 87 
Diagnostic TxD signal  to pin 17 in data link connector   

- -. 
Fuel Injection 
SIEMENS MIS 42.0 AND 43.0 
When system faults  are detected, a  diagnostic trouble  code 
(DTC)  is stored  in the  engine  control module  (ECM). The MIL 
also illuminates 
if an emissions-related  fault  is detected. 
When  faults arise,  or 
if the malfunction indicator lamp  (MIL) is 
illuminated, begin  troubleshooting by connecting  BMW ser- 
vice  tester 
DISplus, MoDiC, GTI or equivalent scan tool.  The 
capabilities  of OBD 
II software has  the potential  to save hours...

Fuel Injection 
- Ignition: 
Direct  ignition 
Knock  control 
4 Primary1 secondary  ignition monitoring 
- Emissions: 
OBD II compliance 
Secondary  air  injection 
Pre- and post-catalyst  oxygen sensors 
0 Electrically  heated DME-mapped  thermostat 
Misfire  detection 
Evaporative  emission control and 
leak detection 
Malfunction indicator  light (MIL) 
Performance controls: 
Dual VANOS  control 
Output  of injection  signal  (TI)  for fuel  economy gauge 
Output  of engine  rpm (TD)  for tachometer...

130-25 
Fuel injection 
CONTROL RESONANCE. 
TURBULENCE 
----, VALVE 
CRANUSHAFT 
SECONDARY  AIR 
MULTI-FUNCTION  ROLLING CODE   

130-26 
Fuel Injection 
Resonance- turbulence 
0021664   

- 
Fuel Injection 
ECM relay, testing 
The engine  control  module (ECM) relay is energized  via the 
ECM  and supplies battery  positive 
(Bc) power to many of  the 
engine management components and subsystems.  If this  re- 
lay  is faulty, the engine will not start. 
NOTE- 
The ECM relay  is also referred  to as  the DME main relay 
ECM  relay powers: 
ECM 
Ignition coils 
* Fuel  injection 
Evaporative leak detection  pump 
Idle air actuator 
- Camshaft sensors  Evaporative emissions  valve 
Hot...

130-28 
Fuel Injection 
ECM Relay 
4 Check  for voltage  at terminal  6 (30) at reiay socket 
If  battery voltage  is present continue testing. 
if battery voltage  is  not present, check fuse  109 (80-amp 
fusible link) under passenger seat carpet.  See 610 Electri- 
cal 
Component Locations. 
- Reinstall relay  and turn  ignition  on. Gain access to back  side 
of  reiay socket  and check  for ground  at terminal 
4. 
If ground is  present continue testing. 
If  ground is  not present,  signal 
from...

Fuel Injection 
A faulty MAF sensor can produce the following  problems: 
Difficult  to restart  when  engine  is hot 
Engine starts  then stalls 
* Engine starts and runs  only with accelerator pedal  de- 
pressed 
4 Disconnect electrical harness connector  from MAF  sensor 
(B). 
- Turn ignition on and  checlc for voltage and ground  at connec- 
tor. 
There should be ground at pin 
1 and battery  voltage at pin 
3. 
- If any faults  are found,  checlc for wiring breaks  between 
MAF  sensor and ECM...

Fuel Injection 
Engine coolant temperature 
(ECT) sensor, 
testing and replacing 
4 The ECT  sensor is located below cylinder 6 intake port at the 
rear  of the engine  (1). 
The ECT sensor is a  dual temperature  sensor. One circuit 
provides coolant temperature information to  the ECM while 
the  other  circuit provides coolant temperature information to 
the instrument cluster. 
The  ECM  determines the correct ignition timing and airlfuel 
mixture required 
forthe engine  temperature  by monitoring...