Throttle BMW 525i 2001 E39 Repair Manual

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Fuel lnjection
I 1- I
4 /output l~em~erature signal. E-box fan I E-box fan
Connector
X60002 (continued)
14
15
16
17
18
19
20
21
22
23
24
5
6
7
8
9
10
11
12
13
14
15
16
Input
Input
Input
Input
Ground
Output Heated
oxygen sensor signal
Heated oxygen sensor signal
Heated oxygen sensor signal
Heated oxygen sensor signal
Not used
Heated oxygen sensor, heater ground
Not used
Not used
Not used
Terminal 85 control
Not used Heated oxygen sensor
II behind catalytic converter
Heated oxygen sensor
I in front of catalytic converter
Heated oxygen sensor
I1 in front of catalytic converter
Heated oxygen sensor
I behind catalytic converter
Heated oxygen sensor I in front of catalytic converter
Engine control module relay
Connector
X60003
Ground
Output Input
Ground
Output
Input
Input
Output
Output
Input
Pin 1
2
3
Not used
Ground for electronic components
Voltage supply for hot
film mass air flow sensor
Signal EDK (electric throttle actuator) Hot film mass air flow sensor, ground
Electric throttle actuator
Not used
Voltage signal, terminal 30h
Alternator
D+ (terminal 61) signal
Injection signal
Injection signal
VANOS valve, signal
Type
Output
Output
Output
Ground connector
X6460
Hot film mass air flow sensor
Electric throttle actuator
Hot film mass air flow sensor
Electric throttle actuator, voltage supply
Starter
Alternator (generator)
Cylinder
7 fuel injection valve
Cylinder 6 fuel injection valve
VANOS valve, cylinder
5-8
Descriptionlfunction
Injection signal
Injection signal
Signal evaporative emission valve Notes
Cylinder 2 fuel injector valve
Cylinder 3 fuel injector valve
Evaporative emission valve

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I Fuel Injection
Connector X60003 (continued) Electric throttle actuator
25
- 27 28
29
30
31
32
33
I I I
36 jlnput I Knoclc sensor 2, signal 1 Knock sensor
I I I
Input
26
Output
Output
input
Output
Input
I ' I . I
43 1 ln~ut I Electric throttle actuator, signal (Electric throttle actuator
Ground, electric throttle actuator
1 Not
used
Hot film mass air flow sensor
34
- 37
38
39
40
41
42
injection signal
Injection
signal
VANOS valve, signal
Not used
Thermostat characteristic map, signal
Crankshaft position sensor, signal
Not used
35 l~round I~nock sensor, shield 1 ~nock sensor
Cylinder
8 fuel injection valve
Cylinder
5 fuel injection valve
VANOS valve, cylinders
1-4
Characteristic map
Crankshaft positionlrpm sensor
input
input
Ground
Input
Output
Output
Innut
Hot film mass air flow sensor, signal
I
44
45 46
47
48
49
50
51
52
Connector )(GO004
Knock sensor 4, signal
Knock sensor, shield
Oil
level (thermal)
Injection, signal
Injection, signal
Electric throttle actuator, signal
Not used
Ground
Crankshaft position sensor, signal
Not used
Knoclc sensor, shield
Knock sensor
1, signal
Knock sensor
3, signal
Knock sensor, shield
Secondary air injection pump valve, signal
'
Ground
Input
Ground
input Input
Ground
Input
I' I ... I . ~
Knock sensor
Knocic sensor
Oil level sensor
Cylinder
4 fuel injection valve
Cylinder
1 fuel injection valve
Electric throttle actuator
Crankshaft sensor shield
Crankshaft
positionlrprn sensor
Knock sensor
Knock sensor
Knock sensor
Knock sensor
Secondary air injection pump valve
Notes
Instrument cluster
Integrated instrument cluster control
Secondary air injection pump
relay
Pin
1
2
3
Electric (auxiliary) cooling fan 4
Type
Output
Output
Outout
Descriptionlsignal type
Charge indicator signal (terminal
61)
Voltage signal, terminal 30h
Secondam air pump relay, activation
Input
5
Signal, electric (auxiliary) cooling fan, signal
I~ot used

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Driveshaft
Driveshaft problems and causes
Symptom Probable cause Corrective action
Vibration when starting off Center bearing rubber deteriorated. Inspect center bearing and rubber. Replace if necessary.
(forward or reverse)
Flex-disc damaged or worn.
Inspect flex-disc. Replace
if necessary.
Engine or transmission mounts
faulty. Inspect engine and transmission mounts. Align or
replace, if necessary.
Front centering guide worn, or driveshaft
Checic front centering guide and replace
if necessary.
mounting flanges out of round.
Check
runout of driveshaft flanges.
Universal joint worn or seized.
Check universal joint play and movement. Replace
driveshaft if necessary.
Driveshaft misaligned. Check driveshaft alignment.
Noise during onloff throttle Final
drive components worn or damaged
Remove final drive and repair. 331 Final Drive
or when engaging clutch. (excessive pinion-to-ring-gear clearance).
Drive axle or CV joint faulty.
Inspect drive axles and CV joints. Repair or replace as
necessary.
331 Final Drive
Vibration at 25 to
30 mph
Front centering guide worn, or driveshaft
Check front centering guide and replace if necessary.
(40 to 50
kmlh). mounting flanges out of round or damaged.
Check runout of driveshaft mounting flanges.
Universal joint worn or seized.
Check universal joint play and movement. Replace
driveshaft if necessary.
Flex-disc damaged or worn.
Inspect flex-disc. Replace if necessary.
Center bearing rubber deteriorated.
Inspect center bearing. Replace if necessary.
Misaligned installed position. Check driveshaft alignment.
Vibration, audible rumble Front centering guide worn, or driveshaft
Check front centering guide and replace
if necessary.
over
35 mph (60 kmlh). mounting flanges out of rouncl or damaged.
Check runout of driveshaft mounting flanges. - -
Mounting flange bolts loose or holes worn.
Remove driveshaft and check transmission output flange
and final drive input flange. Replace if necessary.
Driveshaft unbalanced. Check driveshaft for loose or missing balance weights.
Have driveshaft rebalanced or replace if necessary.
Universal ioint worn or seized.
Check universal ioint
~lav and movement. Reolace ' .. driveshaft if necessary.
Center bearing faulty.
Replace center bearing.
.
Final drive rubber mount faulty.
Inspect final drive rubber mount and repiace if necessary.
Driveshaft misaligned.
Check driveshaft alignment.

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300-1 2
I Sus~ension, Steerincl and Brakes - General
E39 electronic brake and stability control
systems application table
(528i, 54bi) Traction (ASC) I Hydraulic unit in right rear of engine compartment 1
Identifiers
Year (model)
I No precharge pump 1
Manuf. up to 911998 l~utomatic Stability Control plus I Electronic control module next to glove compartment
System
Precharge pump in
lefl front of engine compartment, below
steering fluid reservoir
Separate rotational rate (yaw) and lateral acceleration sensors
I I
Combined rotational rate (yaw) and lateral acceleration sensors
Electronic control
module next to glove compartment
Hydraulic unit in right rear of engine compartment
Manuf. up to 911999
(540i optional)
I I
ABS system
Dynamic Stability Control (Bosch
DSC
Ill v. 5.3)
The electronically controlled
ABS maintains vehicle stability
and control during emergency braking by preventing wheel
lock-up.
ABS provides optimum deceleration and stability dur-
ing adverse conditions. It automatically adjusts brake system
hydraulic pressure at each wheel to prevent wheel lock-up.
Control
moduleihydraulic unit
in right rear of engine compartment
No precharge pump
Manuf. from
911999
(all models)
Automatic Stability Control (ASC)
Dynamic Stability Control (Boscli
DSC Ill v. 5.7)
NOJE-
ASC (Automatic Stability Control) may also be referred to as
ASCiT (Automatic Stability ControkTraction).
ASC works in conjunction with ABS and the engine manage-
ment system to enhance vehicle control. The main function of
the
ASC system is to maintain the contact between the tires
and the road surface under all driving conditions. This is
achieved through exact application and management of brak-
ing and drivetrain forces.
The
ASC system improves traction by electronically applying
the rear brakes when the rear drive wheels are spinning at a
faster rate than the front wheels. The combined
ABSIASC
control module, operating through the ABS hydraulic control
unit, modulates braking force at the rear wheels.
In addition,
ASC overrides the throttle opening to reduce en-
gine torque and maintain vehicle traction. Because the throt-
tle is controlled electronically, the driver cannot increase
engine power output during
ASC intervention regardless of
how far the accelerator pedal is pushed.

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Suspension, Steering and Brakes - ~enerail
The main components of the system are the wheel speed
(pulse) sensors, the
ABSIASC or ABSIDSC control module,
and the hydraulic control unit.
Traction control also comes into operation during decelera-
tion. Decelerating on snowy or icy road surfaces can lead to
rear wheel slip. If a rear wheel starts to drag or lock up, the
ASC system can limit the problem by adjusting throttle, fuel
injection and ignition timing.
4 A switch (arrow) on the center console is used to toggle the
ASC on or off.
NOJE-
Even with the ASC system turned off, if the ASC control mod-
ule senses a difference in wheel speed (one wheel spinning)
the
ASC system applies modulated braling force to the slip-
ping wheel until traction is regained. There is no override of
fuelinjection function.
The ASC system is designed to be maintenance free. There
are no adjustments that can be made. Repair and trouble-
shooting of the ASC system requires special test equipment
and knowledge and should be performed only by an autho-
rized
BMW dealer.
ABSIASC traction
I 1.
control system
Wheel speed sensor
Wheel speed pulse wheel
Brake disk
Brake caliper
ABSIASC hydraulic unit
Brake master cylinder
Pedal operated throttle valve
ASC controlled throttle valve
Engine control module (ECM)
Accelerator pedal
ABSlASC control module

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300-1 4
I Susoension. Steerina and Brakes - General
DSC system I
Dynamic Stability Control (DSC)
Dynamic Stability Control (DSC) utilizes many principles and
components of the ASC traction control system. DSC is ac-
tive throughoutthe driving range, unlike ASC which is only ac-
tive during acceleration and braking. DSC helps stabilize the
vehicle in cornering and avoidance maneuvers by adjusting
engine controls such as throttle, ignition, fuel injection and the
application of
brake pressure individually to the wheels.
Inputs
fi- 0
2 4-* .. o
[11-' IJ
411m4
3?-
G
4 The DSC control module uses various inputs to determine
vehicle instability during braking, cornering, or reduced trac-
tion situations. Based upon these inputs the ABSIDSC con-
trol module sends outputs to the engine control module and
the ABSIDSC hydraulic unit to activate torque reduction pro-
tocols and braking intervention.
-
ABSIDSC control module
OUI~YIS
4
The DSC system can be toggled on and off by a switch
mounted on the center console. Turning off the DSC system
does not disable ABS or ASC functions.
+
Measure ride height (A) from center of fender arch to bottom
of wheel rim.
Car in normal loaded position on the ground. See Normal
loaded position.
Engine
control
module
Specified tires and wheels, correct tire pressure, even tire
wear
-'* 9-
.%A
Correct wheel bearing play
T'== ..t, 9 B
-.m
Model with air suspension (EHC): Disconnect electrical har-
ness connector to air supply pump to prevent automatic
height regulation.
When finished, reset ride height using BMW diagnostic
scan tools DIS or
MoDiC.
NOTE-
Airsupply pump is located beneath a cover under the spare
tire in the floor of the cargo compartment.
- If ride height is outside specification listed, install new
springs. Suspension spring removal and installation is cov-
ered in
310 Front Suspension and 330 Rear Suspension.
Normal loaded position
Each front seat 68 kg (150 Ib)
Center of rear seat 68 kg (150 lb)
Trunk 21 kg (46 lb)
Fuel tank full

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OBD-12
On-Board Diagnostics
Automatic transmission diagnostic trouble codes (continued)
P-code
PI747
PI747
PI 747
PI748
PI748 I I
PI748
PI748
PI748
PI 748
PI 749
PI 750
P1750
PI761
PI761
BMW-FC
150
151
156
15
80
-- PI762
PI763
PI764
PI765
PI765
PI765
P1770
DTC Definition
CAN-BUS Monitoring
CAN-Bus Monitoring
CAN-Bus Monitoring
Transmission Control Module Self-Test
Transmission
Control Module Self-Test
PI748 182 l~ransmission Control Module Self-Test
81
103
105
110
I I
Transmission Control Module Self-Test
Transmission Control Module Self-Test
Transmission Control Module Self-Test
Transmission Control Module Self-Test
19
19
19
147
154
158
146
PI 790
PI791
P1792
PI 794
PI 801
P1802
PI 803
PI 831 Shiftiock Solenoid High input
Shiftlock Solenoid
Low Input
Shiftlock Solenoid Open Circuit
CAN Throttle Valve
CAN Throttle Valve
CAN Throttle Valve
CAN
Torpue Interlace
CAN Torque Reduction
PI 780
I I -
108
54
96
2 19
PI 780 1163 ICAN Torque Reduction
152
80
81
82
80
16
17 18
1 Secondary Pressure Solenoid Communication Error
(M52: Internal
Transmission Control Module Memory Error)
Secondary Pressure Solenoid Circuit
Rangelperformance (System Voltage Input Low)
Secondary Pressure Solenoid Circuit
RangeIPerformance (System Voltage Input Low)
Shiftioclc Solenoid
Shiftiocic Solenoid
internal Transmission Control Module Memory ChecksumlEPROM Error
internal Transmission Control Module Memory
ChecksumIEEPROM Error
internal Transmission Control Module Watchdog Error
internal Transmission Control Module Memory Checksum Error
Shift Solenoid
'A' Low Input
Shift Solenoid
'8' Low Input
Shift Solenoid
'C' Low input
Pressure Control Solenoid
'A' Circuit High
Pressure Control Solenoid 'B' Circuit High
PI832
PI833 13 IPressure Control Solenoid 'C' Circuit High
2

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On-Board Diagnostics
l~utomatic transmission diagnostic trouble codes (continued)
P-code
1 Pi844
I I
14 /Pressure Control Solenoid 'D' Circuit Low
I I PI841 11 /Pressure Control Solenoid 'A' Circuit Low
BMW-FC
Pi842
I
P2722 15 I Pressure Control Solenoid 'E' I
DTC
Definition
Pi 845
Pi 882
Pi 883
PI 889
PI891
PI 892
PI 893
Pi 843 3 8
2 Pressure Control Solenoid '0' Circuit Low
5
57
58
96
96
96
83
P2729
P2730
P2759
P2761
P2763
P2764
Pressure Control Solenoid 'E' Circuit Low
2-3 Shift Circuit High
3-4 Shift Circuit High
System Voltage
- Electrical
System Voltage High Input
System Voltage Low Input
SUDP~V Voltaqe Pressure Control SoienoidIShift Solenoid Circuit High
~~ ~~ ~ Engine diagnostic trouble codes: M52 engine
5
5
4
4
4
4
I I
Pressure Control Solenoid 'E' Control Circuit Low
Pressure Control Solenoid
'E' Control Circuit High
Torque Converter Clutch Pressure Control
Solenoid Control Circuit Electrical
Torque Converter Clutch Pressure Control Solenoid Control
Circuitlopen
Torque Converter Clutch Pressure Control Solenoid Control Circuit High
Torque Converter Clutch Pressure Control Solenoid Control Circuit Low
DTC Definition
Mass or Volume Air
Flow Circuit RangeIPerformance
lntalte Air Temperature Sensor 1 Circuit Rangelperformance
Engine Coolant Temperature Circuit RangeIPerformance
ThrottieIPedai Position SensorISwitch 'A' Circuit
ThrottleIPedai Position SensorISwitch 'A' Circuit
P-code
PO1
01
PO1 11
PO116
PO120
PO120
PO1 20 BMW-FC
8 14
10
112
113
POI 20 1173 /~hrottie/~edal Position SensorISwitch 'A' Circuit
118
ThrottieIPedai Position SensorISwitch 'A' Circuit

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--- -
On-Board Diagnostics - - --- - -- - -
PI542
PI550
PI580
PI 580
PI 580
PI 593
PI622
PI623
PI623
PI 624 176
27 109
114
119
124
123
115
116
168 Pedal Position Sensor Electrical
Idle-Speed
Control Valve Closing Coil Electrical
Throttle Valve Mechanically Stuck
(M73: Throttle Valve 1 Spring Test)
Throttle Valve Mechanically Stuck
(M73: Throttle Valve 1 Spring Test)
Throttle Valve Mechanically Stuck
(M73: Throttle Valve 1 Spring Test)
DlSA (Differentiated lntalte Manifold) Control Circuit Electrical
Map Cooling Thermostat Control Circuit Electrical
Pedal Position Sensor Potentiometer Supply
Pedal Position Sensor Potentiometer Supply
Pedal Position Sensor Potentiometer Supply Channel
1 Electrical (M52: Coolant Thermostat (Coolant
Temperature Below Thermostat Regulating Temperature))

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On-Board ~iaanosticsl
Engine diagnostic trouble codes: M54 engine
P-code
BMW-FC Explanation
PO01 I / 103 I 'A' Camshaft Position Timing Over-Advanced or System Performance (Banlc 1) I I
PO012 1105 I 'A' Camshaft Position Timing Over-Retarded (Bank 1) I I
PO01 4 1104 I 'B' Camshaft Position Timing Over-Advanced or System Performance (Bank 1)
PO01 5
PO030
PO031
PO032
I 1
PO038 179 / HO2S Heater Control Circuit High (Bank 1 Sensor 2)
I I -.
I I
PO050 1 55 I H02S Heater Control Circuit (Bank 2 Sensor 1)
106
25
25
25
PO036
I I
PO051 1 55 I H02S Heater Control Circuit Low (Bank 2 Sensor 1)
'B' Camshaft Position Timing Over-Retarded (Bank 1)
H02S Heater Control Circuit (Bank 1 Sensor 1)
H02S Heater Control Circuit Low (Bank 1 Sensor 1)
H02S Heater Control Circuit Hiqh (Bank 1 Sensor 1)
PO037 1 79 I HO2S Heater Control Circuit Low (Bank 1 Sensor 2)
79
HOPS Heater
Control Circuit (Banlc 1 Sensor 2)
PO052
PO056
PO057
PO058
I I
PO1 03 / 8 I Mass or Volume Air Flow Circuit High. Input
I I -.
I I
PO1 07 1 197 I Manifold Absolute PressureIBarometric Pressure Circuit Low Input
55
61
61
61
PO101
I I
POI08 1197 / Manifold Absolute PressureIBarometric Pressure Circuit High Input
H02S Heater Control Circuit High (Bank 2 Sensor 1)
H02S Heater Control Circuit (Bank 2 Sensor 2)
HO2S Heater Control Circuit Low (Bank 2 Sensor 2)
HO2S Heater Control Circuit Hiqh (Banlc 2 Sensor 2)
PO102 18 I Mass or Volume Air Flow Circuit Low Input
149
I I -
PO122 112 ThrottleIPedai Position SensorISwitch 'A' Circuit Low
PO123 1112 I ThrottleIPedal Position SensorISwitch 'A' Circuit High
Mass
or Volume Air Flow Circuit
RangeIPerformance
PO112
PO113
PO1 17
PO118
PO121
14
14
10
10
118
PO128
PO1 31
PO132
PO133
PO133
PO1 34 Intake
Air Temperature Sensor 1 Circuit Low
Intake Air Temperature Sensor 1 Circuit High
Engine Coolant Temperature Circuit Low
Engine Coolant Temperature Circuit High
ThrottleIPedal Position SensorISwitch 'A' Circuit RanqeIPerformance
I I
168
150
150
229
231
150
PO135
Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
02 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
02 Sensor Circuit High Voltage (Bank 1 Sensor 1)
02 Sensor Circuit Slow Response (Bank
1 Sensor 1)
02 Sensor Circuit Slow Response
(Banlc 1 Sensor 1)
02 Sensor Circuit No Activitv Detected
(Banlc 1 Sensor 1)
188 02 Sensor Heater Circuit (Bank 1 Sensor 1)