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1997-2002 Porsche Boxster (986) Service & Repair Manual
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TechnicalManual
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Technical Information
Contents:
Group 0
Diagnosis
Part 2 (as of Repair Group 69)
WKD 483 521
TITEL.CHP

Foreword Boxster
Foreword
The workshop documentation for the Boxster model has the designation "Boxster" Technical Manual
and contains Technical Information as well as instructions on Repairs.
The integration of the technical information published in the "Boxster" Technical Manual with the
descriptive matter on repairs provides the user with a complex reference work that combines into one
book associated or cross-referenced material of relevance to workshops and originating from various
information media.
The "Boxster" Technical Manual consists of 15 folders, subdivided into the following Groups
0 Entire vehicle -General
0 Diagnosis, part 1 (up to Repair Group 45) *1
0 Diagnosis, part 2 (as of Repair Group 69) *2
1 Engine, part 1 (up to Repair Group 13) *3
1 Engine, part 2 (as of Repair Group 15) *4
2 Fuel, exhaust, engine electronics
3 Transmission, manual transmission
3 Transmission, automatic transmission
4 Running gear
5 Body
6 Body equipment, exterior
7 Body equipment, interior
8 / 9 Air conditioning / Electrics
9 Circuit diagrams, part 1 (up to and including the '99 model) *5
9 Circuit diagrams, part 2 (as of the '00 model) *6
*1
The two folders with Group Dare to be regarded as one folder; i.e. file the "Technical Information"
notices only in front of the repair descriptions in the folder "GroupD -Diagnosis, part 1"
(up to Repair Group 45).
*2
The second folder "Group 0 -Diagnosis, part 2" (as of Repair Group 69) includes the further
Repair Groups belonging to Group O.
*3
The two folders with Group 1 are to be regarded as one folder; i.e. file the "Technical Information"
notices only in front of the repair descriptions in the folder "Group 1 -Engine, part 1" (up to
Repair Group 13).
*4
The second folder "Group 1 -Engine, part 2" (as of Repair Group 15) includes the further Repair
Groups belonging to Group 1.
VORW.CHP
Foreword
Printed in Germany -34, October 1999

Foreword Boxster
*5
The two folders with Group 9 are to be regarded as one folder; i.e. file the 'Technical Information"
notices only in front of the repair descriptions in the folder "Group9 -Circuit diagrams, part 1" (up to
the '99 model).
*6
The second folder "Group9 -Circuit diagrams, part 2" (as of the '00 model) includesthe further
circuit diagrams belongingto Group 9.
The "Boxster" Technical Manual has the same structure in each folder, with the following breakdown for
all Groups: I
Titte page, "Boxster" Technical Manual
> Foreword
Title page: "Technical Information"
> Table of Contents,Technicalinformation
> Technical information
Title page: "Repair"
> Repair Groups: overview
> Table of Contents,repairs
> General/technical data
> Instructions on repairs
As can be seen from the breakdown, the published TechnicalInformation is in the front part of each
folder -numbered according to the Groups. The Table of Contentsassignedto each Group will be
periodicallyupdated.
Following the Technical Information, separated by a title page, the instructions on repairs -assigned
according to the Groups or broken down into RepairGroups -are includedin the folder.
The instructions on repairs will be extended and updated by means of supplements.
Note
Sheets that already exist in the "Boxster" Technical Manual and are updated or revised and thereby
exchanged by a supplement are designated "Replacement sheet". Revisions or technical modifications on
pages of these replacement sheets are identified for the user with a vertical bar at the margin.
Foreword
Printed in Germany -34, October 1999
VORW.CHP

Overview of repair groups Boxster
Group 0: Entire vehicle -General
Maintenance
0
03
Group 0:
Diagnosis
Sales check
On-board diagnosis
DME diagnosis
Tiptronic diagnosis
ABS diagnosis
0
01
03
24
37
45
Group 0:
0
69
72
80
90
91
91
94
Diagnosis
Airbag diagnosis
Seat memorydiagnosis
Heatingdiagnosis
Alarm system diagnosis
PCMdiagnosis
ParkAssistent diagnosis
HBA diagnosis
8
Group 1: 1
10
13
Engine
Engine -Crankcase, suspension
Engine -Crankshaft, pistons
Group 1: 1
15
17
19
Engine
Engine -Cylinder head,valve drive
Engine -Lubrication
Engine-Cooling
Group 2: 2
20
21
24
25
26
27
28
Fuel, exhaust, engine electronics
Fuel supply, control
Exhaust system, turbocharging
Fuel system, electronic injection
Fuel system, K-Jetronic
Exhaust system
Starter, power supply, cruise control
Ignition system
Group 3: 3
30
34
35
39
Transmission, manual transmission
Clutch, control
Manual transmission -Actuation, housing
Manual transmission -Gears, shafts, into gearsh.
Final drive, differential, differential lock
3
32
37
38
39
Group 3: Transmission, automatic transmission
Torque converter
Automatic transmission-Actuation, housing
Automatic transmission-Gears, control
Final drive, differential,differential lock
Overview of repair groups
Printed in Germany -34, October 1999 REPGRU.CHP

Overview of repair groups
Boxster
Group 4:
4
40
42
44
45
46
47
48
Running gear
Frontwhee! suspension, drive shafts
Rearwheel suspension, drive shafts
Wheels,tires, suspensionalignment
Anti-LockBrake System (ABS)
Brakes-Brake mechanics
Brakes -Hydraulics, regulator, booster
Steering
Group 5:
5
50
51
53
55
57
Body
Body front
Body center, roof, frame
Body rear
Lids, flaps
Door front, central locking system
Group 6:
6
60
61
63
64
66
68
69
Body equipment, exterior
Sliding roof
Convertible top, hardtop
Bumpers
Glazing, windcw control
Exterior equipment
Interior equipment
Passenger protection
Group 7:
Body equipment, interior
Linings, insulation
Seat frames
Seatupholsteries, covers
7
70
72
74
Group 8:
8
80
85
87
88
Air conditioning
Heating
Ventilation
Air conditioning
Auxiliary air conditioning system
Group 9
9
90
91
92
94
96
8
Electrics
Instruments, alarm system
Radio, telephone, on-board computer, navigation
Windshield wiper and washer system
Lights, lamps, switches exterior
Lights, lamps, switches interior, theft protection
Group 9:
9
97
Circuit diagrams
Wiring (up to and includingthe '99 model)
Group 9:
9
97
Circuit diagrams
Wiring (from the '00 model)
8
Overview of repair groups
Printed in Germany -34, October 1999 REPGRU.CHP

Boxster Table of Contents
0 Diagnosis, part 2 (as of Repair Group 69)
69
6901
6901
Airbag diagnosis
System B 04. ..
System B 05. ..
69 -D 1
69 -D 21
72 I
I
7298
Seat memory diagnosis
System SOl 72 -D 1
80 I
80 O[
Heating diagnosis
System H01 .. 80-0 1
90 I
9001
Alarm system diagnosis
SystemI16
90-01
90
9025
Instrument cluster diagnosis
SystemKOX
90 -D 49
91 I
I
91 Q1
PCM diagnosis
System N 01 . 91 -0
91 :
9161
ParkAssistent diagnosis
System POI 91 -0 39
94
94192
Headlight beam adjustment diagnosis
SystemHBAOl
94 -D 1
96:
I
96101
Alarm system diagnosis
SystemI32
96 -0 1
.8
1 0 Diagnosis, part 2 (as of Repair Group 69)
Printed in Germany -36, 1999 986TOC

Boxster
Airbag diagnosis
6901
. 8
69 01 Diagnosis/troubleshooting, airbag
Printed in Germanv -17. 1997
69 -D 1
986D691

Airbag diagnosis
Boxster
Contents overview
Page
General information 69-0 3
Menu (overviewof the possible menus) 69 -D 4
Component arrangement 69 -D 5
Function, individual components 69 -D 6
69 -D 7
System description
Tools 69-0 8
Connector assignment, triggering unit 69 -D 9
Fault memory {overview of possible faults} 69. D 10
Fault overview 69 -0 11
Test points 69 -D 12
Events 69 -D 17
Lock 69 -0 18
Extract coding 69 -D 19
Modifycoding
69 -D 20
69 01 Diagnosis/troubleshooting, airbag
Printed in Germany -17, 1997
69 -D 2
986D691

Airbag diagnosis
Boxster
General information
The airbag system is constantlymonitored by a
diagnosis unit in the triggering unit. Any fault is
signalled by a warning light.
The following components must be removed and
replaced following an accident in which the
airbag system was triggered:
The warning light for the airbag system lights up
in the event of a fault.
Contact unit
The airbag warning light lights for approx.
3 seconds after the ignition is switched on and
goes out if no fault has been entered in the fault
memory.
Airbag unit, driver's side
Airbag unit, passenger's side, if fitted and if
triggered.
If it lights up again,this indicates a fault in the
system. The fault can be read out with the
Porsche SystemTester 2.
The triggering unit must be replaced after the
airbag is triggered for the third time.
Note
A period of 10 seconds is required to enablethe
triggering unit to identity all faults in the system.
In order to guarantee that every possible fault
source is checked during the vehicle test, the
ignition must be switched on for at least
10 seconds.
The fault memory must be cleared following
a fault in the airbag system and after it has been
remedied.
The replacement of a component must be noted
in the Guarantee and Maintenance booklet. To do
this, attach the documentation number in a free
panel intendedfor that purpose. The
documentationnumber is attached to the
replacementpart as a tear-off sticker.
69 01 Diagnosis/troubleshooting, airbag
Printed in Germany -17, 1997
69 -D 3
986D691

Airbag diagnosis Boxster
Menu
Overview of the possible menus
Faultmemory
Events
Lock
Extract coding
Modify coding
Faultmemory: see Page 69 -D 10
Events: see Page 69 -D 17
Lock: see Page 69 -0 18
Extract coding: see Page 69 -D 19
Modifycoding:
see Page 69 -D 20
Note
Observe safety instructions (see Service No. 69)
when working on the airbag system.
69 -D 4 69 01 Diagnosisjtlroubleshooting, airbag
Printed in Germany -17,1997 986D691
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Porsche Boxster Workshop Manual (986)
Models / Engines:
- All 986 Boxster models from 1997 to 2002
- Boxster S
Including:
- General Information / Specification
- Engine
- Lubrication, Cooling, Fuelling System
- Clutch, Gearbox, Rear Axle
- Steering
- Front Suspension
- Rear Suspension, Shock Absorbers
- Brakes, Wheels and Tyres
- Instrument and Control
- Heating, Ventilation and AC
- Electric System
- Torque Settings
- Body
- Emission Controls
- Plus More