1997 BMW 525i ECO

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I On-Board Diagnostics
Engine diagnostic trouble codes: M54 engine (continued)
P-code
BMW-FC Explanation
Catalyst System Efficiency Below Threshold (Bank 2)
PO430
PO443
PO444
PO445
PO455
PO456
PO491
PO492
PO500
PO441 1250 / Evaporative Emission System Incorrect Purge Flow
234
I I
68
68
68 143
143
245
246
214
PO604
PI083
PI084
PI085
PI086
Evaporative Emission System Purge Control Valve Circuit
Evaporative Emission System Purge Control Valve Circuit Open
Evaporative Emission System Purge Control Valve Circuit Shorted
Evaporative Emission System Leak Detected (large leak)
Evaporative Emission System Leak Detected (very
small leak)
Secondary Air injection System Insufficient Flow (Bani( 1)
Secondary Air Injection System insufficient Flow
(Banic 2)
Vehicle Speed Sensor
'A'
Idle Air Control System PO505
.
PI 087
PI 088
PI089
PI090
PO600 / 217 I Serial Communication Link
204
100
202
202
203
203
PI091
PI092
PI093
PI094
Pllll
PI112
PI120
Internal Control Module Random Access Memory (RAM) Error
Fuel Control Limit Mixture Too Lean (Bank 1 Sensor
1)
Fuel Control Limit Mixture Too Rich (Bank 1 Sensor 1)
Fuel Control Limit Mixture Too Lean (Bank 2 Sensor 1)
Fuel Control Limit Mixture Too Rich (Banic 2 Sensor 1) ~ ~
229
229
230 235
PI121
PI122
PI123
02 Sensor Circuit Slow Response in Lean Control Range (Bank 1 Sensor 1)
02 Sensor Circuit Slow Response in Rich Control Range (Bank 1 Sensor
1)
02 Sensor Circuit Slow Response in Lean Control Range (Banlc 1 Sensor 2)
Pre Catalyst Fuel Trim System Too Lean
(Bank 1)
236
235
236
230
11
11
114
PI134
PI135
PI136
PI137
PI138
Pre Catalyst Fuel Trim System Too Lean (Banic 2)
Pre Catalyst Fuel Trim System Too Rich
(Bank 1)
Pre Catalyst Fuel Trim System Too Rich (Bank 2)
02 Sensor Circuit Slow Response in Rich Control Range (Banic 2 Sensor 1)
Engine Coolant Temperature Sensor Radiator Outlet Low Input
Engine Coolant Temperature Sensor Radiator Outlet High Input
Pedal Position Sensor Circuit
117
110
110
25
25
25
79
79 Pedal Position Sensor 1
RangeIPerformance Problem
Pedal Position Sensor 1 Low Input
Pedal Position Sensor 1 High Input
02 Sensor Heater Circuit Signal Intermittent (Bank 1 Sensor 1)
02 Sensor Heater Circuit Low Voltage (Bank 1 Sensor
1)
02 Sensor Heater Circuit High Voltage (Bank 1 Sensor 1)
02 Sensor Heater Circuit Signal Intermittent (Bank 1 Sensor 2)
02 Sensor Heater Circuit Low Voltage
(Banic 1 Sensor 2)
-
-

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OBD-21
On-Board
~ia~nosticsl
Engine diagnostic trouble codes: M54 engine (continued)
P-code
BMW-FC Explanation
I I
PI314 / 202 / Fuel Mixture Deviation Detected with Low Fuel
I I
02 Sensor Heater Circuit High Voltage (Bank 1 Sensor 2)
02 Sensor Activity Check Signal Too High (Banlc 1 Sensor 2)
02 Sensor Activity Check Signal Too Low (Bank 1 Sensor 2)
02 Sensor Activity Check Signal Too High (Banlc 2 Sensor 2)
02 Sensor Activity Check Signal Too Low (Bank 2 Sensor 2)
02 Sensor Heater Circuit Signal Intermittent (Bank 2 Sensor
1)
02 Sensor Heater Circuit Low Voltage (Bank 2 Sensor 1)
02 Sensor Heater Circuit High Voltage (Bank 2 Sensor 1)
02 Sensor Heater Circuit Signal Intermittent (Banlc 2 Sensor 2)
02 Sensor Heater Circuit Low Voltage (Bank 2 Sensor 2)
02 Sensor Heater Circuit High Voltage (Bank 2 Sensor 2)
Ambient Pressure Sensor Variant Recognition Value in Boot Range Implausible
Ambient Pressure Sensor Variant Recognition Error Value Stored in Boot Range
Ambient Pressure Sensor Variant Recognition Learning Failed
Pre Catalyst Fuel Trim System (Bank 1)
Pre Catalyst Fuel Trim System (Bank 2)
PI139
PI143
PI144
PI149
PI150
PI151
PI152
PI153
PI155
P1156
PI157
PI171
PI172
PI173
PI 190
PI191
79
21 5
21 5
21 6
21 6
55
55
55
61
61
61 196
196
196
235
236
Pedal Position Sensor 2 Low
Input PI222
-~~~~~~~~~ PI314
PI314
PI314
PI342 - PI343
PI 344
PI192
PI193
PI223 /I11 I Pedal Position Sensor 2 High Input
111
PI 345
PI 346
PI 347
PI348
PI 349
PI350
PI351
PI352
PI353
225 Post Catalyst Fuel Trim System (Bank 1)
226 Post Catalyst Fuel Trim Svstem (Bank 2)
203
227
228
238
238
239 Fuel Mixture Deviation Detected with Low Fuel
Fuel Mixture Deviation Detected with Low Fuel
Fuel Mixture Deviation Detected with Low Fuel
Misfire During Start Cylinder 1
Misfire Cylinder 1 with Fuel Cut-Off
Misfire Durina Start Cylinder 2
239
240
240
241
241
242
242
243
243
-
Misfire Cylinder 2 with Fuel Cut-Off
Misfire During Start Cylinder 3
Misfire Cylinder 3 with Fuel Cut-Off
Misfire During Start Cylinder 4
Misfire Cylinder 4 with Fuel Cut-Off
Misfire during Start Cylinder 5
Misfire Cylinder 5 with Fuel Cut-Off
Misfire during Start Cylinder 6
Misfire Cylinder 6 with Fuel Cut-Off

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OBD-22
I On-Board Diagnostics
Engine diagnostic trouble codes: M54 engine (continued)
P-code
BMW-FC Explanation
PI 41 3
PI414
PI444
PI 445
PI446
PI447
PI 448
PI 449
PI 451
35
35
142 140
140
142
142
142
126
Secondary Air Injection Pump Relay Control Circuit Signal Low
Secondary Air Injection Pump
Relay Control Circuit Signal High
Diagnostic Module Tank Leakage (DM-TL) Pump Control Open Circuit
Diagnostic Module Tank
Leaitage (DM-TL) Pump Control Circuit Signal Low
Diagnostic Module Tank Lealtage (DM-TL) Pump Control Circuit Signal High
Diagnostic Module
Tanlc Leakage (DM-TL) Pump Current Too High during Switching Solenoid Test
Diagnostic Module
Tank Leakage (DM-TL) Pump Current Too Low
Diagnostic Module
Tank Leakage (DM-TL) Pump Current Too High
Diagnostic Module
Tank Leaitage (DM-TL) Switching Solenoid Control Circuit Signal Low

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On-Board ~ia~nosticsl
I I
PO340 1113 I Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)
Engine
diagnostic trouble codes:
M62 engine (continued)
P-code
PO342
PO343
PO345
PO347
PO348
PO363
PO370
PO41 2
PO335 I111 I Crankshaft Position Sensor 'A' Circuit
BMW-FC
I I -
I I -
PO445 1 98 1 Evaporative Emission System Purge Control Valve Circuit Shorted
Explanation
113
113
114
114
114
62 112
85
PO41 3
PO41 8
PO420
PO430
PO440
PO442
PO442
PO443
PO444
Camshaft Position Sensor 'A' Circuit Low (Bank 1 or Single Sensor)
Camshaft Position Sensor
'A' Circuit High (Bank 1 or Single Sensor)
Camshaft Position Sensor
'A' Circuit (Bank 2)
Camshaft Position
Sensor'A' Circuit Low (Bank 2)
Camshaft Position Sensor 'A' Circuit High
(Banic 2)
Misfire Detected
- Fueling Disabled
Timing Reference High Resolution Signal
'A'
Secondary Air lniection System Switchinq Valve A Circuit
PO41 4 / 85 I Secondary Air Injection System Switching Valve A Circuit Shorted
85
84
40
45 93 183
188
98
98
PO450
PO452
PO453
PO455
PO456
PO491
PO492
PO500
PO506
I I
PI102 1163 I Idle Control System, Adaptation of Unmetered Air Mass Too Low
Secondary
Air Injection System Switching Valve A Circuit Open
Secondary Air Injection System Control
'A' Circuit
Catalyst System Efficiency Below Threshold (Bank 1)
Catalyst System Efficiency
Below Threshold (Bank 2)
Evaporative Emission System
Evaporative Emission System Leak Detected (small
leak)
Evaporative Emission System Leak Detected (small leak)
Evaporative Emission System Purge Control Valve Circuit
Evaporative Emission System Purqe Control Valve Circuit Open
I
I
185
185
185
183
187
80
81 120
32
PO507
Evaporative Emission System Pressure SensorISwitch
Evaporative Emission System Pressure SensorISwitch Low
Evaporative Emission System Pressure
SensorISwitch High
Evaporative Emission System
Leaic Detected (large leak)
Evaporative Emission System
Leal$ Detected (very small leak)
Secondary Air Injection System Insufficient Flow (Bank
1)
Secondary Air Injection System insufficient Flow (Bank 2)
Vehicle Speed Sensor
'A'
idle Air Control System RPM Lower Than Expected
PI103
PI130
PI131
PO600 1 220 I Serial Communication Link
32
idle Air
Control System RPM Higher Than Expected
163
17
23
Idle Control System, Adaptation of Unmetered Air Mass Too Large
02 Sensor Circuit Dynamic Test (Bank
1 Sensor 2)
02 Sensor Circuit Dynamic Test (Bank 2 Sensor 2)

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On-Board ~ia~nosticsl
Engine diagnostic trouble codes: M62 engine (continued)
P-code
I I -
I I - -.
PI445 1186 / Diagnostic Module Tank Leakage (DM-TL) Pump Control Circuit Signal Low
PI357
PI382
PI386
PI413
PI414
PI441
PI442
PI443
PI444
P1356 1 53 I Misfire during Start Cylinder 8
BMW-FC
I P1523
I
I - -
1165 I 'A' Camshaft Position Actuator Signal Low (Banlc 1)
Explanation
P1381 1215 I Control Module Self-Test, Knock Control Onset (Bank 1)
53
21 6
21 4
84
84
1
1
1
186
PI 446
PI 447
PI 448
PI449
PI 450
PI451
PI452
PI476
Misfire Cylinder 8 with Fuel Cut-Off
Control Module Self-Test, Knock Control Test Pulse (Bank 1)
Control Module Self-Test, Knock Control Circuit Baseline Test (Bank 1)
Secondary Air Injection Pump Relay Control Circuit Signal Low
Secondary Air Injection Pump
Relay Control Circuit Signal High
Leakage Diagnostic Pump Control Open Circuit
Leakage Diagnostic Pump Control Circuit Signal Low
Leakage Diagnostic Pump Control Circuit Signal High
Diagnostic Module Tank Leakage (DM-TL) Pump Control Open Circuit
186
189
189
189
2
2
2
184
P1524
P1525
P1526
PI527
PI528
PI633
PI 634
PI 635
I I
PI 638 / 131 I Throttle Valve Position Control Throttle Stuck Temporarily
. -
Diagnostic Module Tank Leakage (DM-TL) Pump Control Circuit Signal High
Diagnostic Module
Tank Leakage (DM-TL) Pump Current Too High during Switching Solenoid Test
Diagnostic Module Tank Leakage (DM-TL) Pump Current Too Low
Diagnostic Module
Tank Leakage (DM-TL) Pump Current Too High
Diagnostic Module Tank Leakage (DM-TL) Switching Solenoid Control Open Circuit
Diagnostic Module
Tank Leakage (DM-TL) Switching Solenoid Control Circuit Signal Low
Diagnostic Module
Tank Leakage (DM-TL) Switching Solenoid Control Circuit Signal High
Leakaqe Diaqnostic Pump Clamped Tube
I I
165
165
166
166
166
136
133
134
'A' Camshaft Position Actuator Control Circuit Signal High (Banlc 1)
'A' Camshaft Position Actuator Control Open Circuit (Bank 1)
'A' Camshaft Position Actuator Control Open Circuit (Bank 2)
'A' Camshaft Position Actuator Control Circuit Signal Low (Bank 2)
'A' Camshaft Position Actuator Control Circuit Signal High (Bank 2)
Throttle Valve Adaptation Limp-Home Position Unknown
Throttle Valve Adaptation Spring Test Failed
Throttle Valve Adaptation Lower Mechanical Stop not Adapted
Throttle Valve Control Circuit
PI 636
PI639
P1643
P2088
P2089
PI 637 / 130 I Throttle Valve Position Control, Control Deviation
132
131
135
165
165 Throttle
Valve Position Control Thronle Stuck Permanently
Throttle Valve Actuator Start Test Amplifier Balancing Plausibility
'A' Camshaft Position Actuator Control Circuit Low (Banlc 1)
'A' Camshaft Position Actuator Control Circuit High (Bank 1)

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INDEX 'tl
WARNING
Your common sense, good
judgemenl, and general alertness are
crucial to sale and successiul service
worlr. Belore attempting any work on
your
BMM be sure lo read 001
General Warnings and Cautions
and the
copyriglll page at the front 01
the manual. Review these warnings
and
caulions each lime you prepare
lo work on your BMW. Please also
read any warnings and cautions that
accompany
tile procedures in the
manual.
312-way valve (running losses)
see Fuel tank
Abbreviations, commonly used 600-14
ABS (antilock brake system)
see
Bral(es
A/C air distribution motors
see stepper motors (below)
blower final stage (resistor pack),
replacing
640-16
blower, removinglinslalling
640-1 5
compressor, replacing
640-24 condenser, replacing 64045
control panellmodule, removing1
installing
640-1 1
evaporakr, removinglinstalling 640-29
evaporator temperature sensor
640-12 expansion valve, removinglinstailing
640-27
IHKA/ IHKR system description 640-5
receiveridrier, replacing 640-26
stepper motors 640-1 3 ventilation microiilter, replacing
020-22. 640-17
see also Heating
Accelerator
iinlcage
see Maintenance
Activated carbon canister
see Fuel tank
ADS (auxiliary throttle valve)
130-57
Air compressor
330-44
Air conditioning
see
AIC
Air distribution (flap) motors
seeNC, stepper motors
Air filter see Maintenance
Air spring
300-6, 330-12
Airbag system (SRS)
2-stage
airbag 721-4
control module, replacing 721-7 driver airbag, removinglinstalling
721-8
iiead protection airbag 721-12 components 721-1 1
indicator
lighl721-4
passenger airbag, removinglinstalling
721-9 side-impact airbags crash sensor,
replacing
721-7
Airflow sensor see 130 under appropriate
fuel
injection system
Air pump
see 130 under appropriate fuel
injection system, secondary air
injection system
Air suspension
see Electronic height control
(EHC)
Alarm
see Anti-theft alarm
Alignment see
Wheei alignment
Aluminum suspension components
300-2
Antenna 650-6
Alternator see Battery, starter, alte rnator
Amplifier
650-4
Anti-theft alarm (DWA)
515-24 emergency disarming 515-31
Antifreeze (engine coolant)
see Maintenance
see also Cooling system
Antilock brake system (ABS) see Brakes
ASC see Brakes
ATF (automatic transmission fluid)
see Automatic transmission
see also Cooling systern
Automatic headlight adjustmenl
(LWR) see Lights
Automatic seat belt tensioner
720-4
Automatic shiftloclc
see
Gearshift
Automatic transmission
applications
200-3, 240-4
ATF 020-10, 200-4
capacity 240-8 checking 240-6
drainingifilling 240-7
heat exchanger 170-5
fluid pan and strainer 240-9 gearshift
see Gearshift
ID tag
200-3 range switch 610-6
removaliinstallation 240-10
steptronic see Gearshift
Auxiliary cooling fan
see
Coollng system, electric Ian
Auxiliary throttle valve (ADS)
130-57
Axle joint
see Drive axle
Back-up light switch
automatic transmission see Automatic transmission. range switch
- .~.~~~
manual transmission 230-8 -
- I

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Manual transmission
applications 200-2. 230-5
back-up light switch, replacing 230-6
gear ratios 230-6
gearshift
see Gearshiit
ID tag 200-2
fluid 020-1 0. 200-4 fluid service 230-6
oil seals
input shaft seal, replacing
230-17
output shalt seal, replacing 230-1 1
selector
shaft seal, replacing 230-8 pilot bearing 210-16
removallinstallation 230-19
see also Maintenance
Map light
see Lights, interior
Mass air flow
(MAF) sensor
see 130 under appropriate fuel
injection syslem
Master cylinder
see Brakes
see also Clutch, hydraulics
MDK
130-42
Microfilter see
NC, ventilation microfilter
see also Maintenance
Mirror see Exterior trim
Misfire see Ignition syslem, diagnosis
Motor mount
see Engine,
mounl
MRS (multiple restraint system)
see Airbag system (SRS)
Muffler
see Exhaust syslem
Neutral safety switch
see Automatic transmission, range
switch
OED II (on-board diagnostics)
OED-l
Oil change equipment 010-16
Oil level sensor
see Lubrication system
Oil pan
see Lubrication system
OH pressure
see Lubrication system
Oil pump
see Lubrication system
Oil service 020-1 1
On-Board Monitor
640-12
On-board diagnostics OED-1
Outside air temperature sensor
610-14
Outside door handle
see Door
loclc
Outside mirror switch
see Switches
Output
shaft oil seal
see Manual transmission, oil seals
Overheating
see Cooling system, troubleshooting
Overload protection
600-11
Oxygen sensors
130-72, 180-8
P codes OED-10
Panic mode operation
515-11
Parking brake
see Brakes
see also Maintenance
Parts, buying
010-11
Pedal cluster switches
see Switches
Pedal position sensor (PWG)
6-cvlinder
enqine
V-8 engine (M62 TU) 130-68
Pitman arm
see Steering
Power steering
see Steering
Power steering
fluid
see Maintenance
Power window switch
512-3 see also Switches
PWG see Pedal position sensor
(PWG)
Racic and pinion steering
see Steering
Radiator see Cooling system
Radiator cooling fan seeCooling system, cooling fan
see also Cooling system, electric fan
Radiator grill
see Exterior
trim
Radio
650-2 see also Antenna
see also Speakers
Rain sensor
611-6
Raising car safely
010-5
Readiness codes
OED-6
Rear door window
see Door window
Rear main seal
see Crankshalt oil seals
Rear parcel
sheif
513-16

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INDEX 9
WARNING
Your common sense, good judgemenl, and general alerlness are
crucial lo seie end successful service
ivork. Beiore attempting any work on
your
BMW be sure to read 001
General Warnings and Cautions and llle copyright page at lhe iron1 of
the manual. Review Niese warnings
and caulions each lime you prepare
lo work on your BMW Please also
read any warnings and caulions lllal accompany the procedures in the
manual.
Rear suspension
ball joints
330-19
bushings 330-13
control arms
seesuspension arms, below
description
300-5
electronic height control (EHC)
330-44
ride height 300-14 ride height sensor 330-46
shoclr absorbers end springs 330-9
stabilizer bar 330-42
struts and springs 330-5 subframe 330.13
suspension arms 330-13
variations 330-4 wheel bearing, replacing 330-32
see also Maintenance
see also Drive axles
see also Final drive
Rear window (Sport Wagon)
see
Tailgate
Rear window defroster 610-17
Receiverldrter
see NC
Relay positions
see Electrical component tocations
table 610-3
Remote entry (FZV)
see Central locking
Reversing light switch
see
Baclc-up light switch
Ride height
300-14
Ride height sensor
see Rear suspension
Ring antenna
see EWS (electronic immobilizalion)
Rotor
see Brakes
Roundel see Exterior trim
Running tosses
(312-way) valve
see Fuel
tenlr
SCA (soft close)
seeTailgate, soft close
see also Trunk lid. soft close
Scan tools
OED-3
Seals gaskets and 010-9
see also Crankshaft seals
Seat front,
removing/instelling 520-10
memory system 520-4 rear 520-13
see also Seat belt
Seat beit front 720-4
rear 720-8
troubleshooting 7202
see also Maintenance
Secondary air injection
see 130 under appropriate
iuel
injection system
Selector shaft seat
see Manual transmission, oil
Seals
Self-adjusting ctulch (SAC)
see Clutch, variations
Service indicator see Maintenance
Shift interlock see Gearshift
Shift lever
see
Gearshift
Shift linkage see Gearshift
Shiftlock see Gearshilt
Shack absorber see Rear suspension
/ Side turn signal assembly
see Lights
Sill trim panel
411-10
Slave cylinder
see Clutch, lhydraulic
Steep mode
600-1 1
Soft close
(SCA) see Tailgate
see also
Trunk lid
Solenoid 121-23
Sound system
650-2
Spare parts kit
010-21
Spark plugs
see Maintenance
Speakers
650-4
Specifications, fluid
020-4
Sport wagon
400-4
Springs
see Front suspension
see also Rear suspension
SRS (supplemental restraint system)
see
Airbag system (SRS)
Stabilizer bar see Front suspension
see also Rear suspension
Starter see Battery, starter, alternator