SERVICE
DIAGNOSIS OF THE INSTRUMENT CLUSTER
INFORMATION Pnnted Cooynght
I” Germany by Or-tng.
4ktengesellschafl
WKD
495 821
h. c F Porsche
TECHNIK
ON +
4 4 4 4
DIAGNOSIS
BOARD
++++++++++++++++++++++++++++++++++++++++++++ . . . . . . . . + . .
4 4 4 4 +
+
4
4
4 4
4 4
+
+
4
4
4
4
+
4
4 +++o+++++++++++++++++++++++++++++++++++++++++++++++++
+
DIAGNOSIS OF
THE
INSTRUMENT
CONTENT _______--__----------------------------------------------------General Operating-lever functions Activating diagnosis Instrument cluster diagnosis, reading fault memory Fault warning display Clearing the fault memory, driving actuators Checking sensors Checking switches Specific functions
PORSCHE Service,November
1988
CLUSTER
CHAPTER
PAGE 2 3 4
K K1.l K1.2/K2 K3 K4 K5
5 6 7 8 11 13
I
-I.:
.i
~.
DIAGNOSIS ON
-
INSTRUMENT
BOARD
the the the the
*,,
.I
‘:;
-t
::,,:;*i
..,‘I
::.
928
;..:.::..:.,~J~l.:’
84
DIAGNOSIS
of the INSTRUMENT CLUSTER itself, as and sensors in the vehicle can be ON BOARD DIAGNOSIS. instrument cluster, the instrument's used to indicate:
individual steps in the software status, duration and/or journey ACTUAL values of sensors
The current diagnosis display boxes and the code. e.g.
I_
CLUSTER
The correct functioning well as diverse switches ?'3checked by means of the "During diagnosis of the three display boxes are a.) b.) c.) d.)
.
‘..
step is central
diagnosis, during which and switches. indicated display
warnings
in the left box indicates
were and the
issued,
right control
unit
display:
The control is assigned indicating unit.
unit code contains a letter (K = instrument diagnosis is an identification figure when the respective software status (e.g. K18) of
cluster) which activated, the control
The corresponding data values for each diagnosis step are indicated in the right-hand display box as either a code number or in plain text. sensors or actuators are also assigned a code number in Switches, the left-hand display box which identifies the respective component. e.g.
display: l.;~~~i;;;~ompon!
Fault
Example
temperature
Current
engine
p-j
Al
sensor temp.
:
80°C
LzEFjl Coolant Coolant Coolant
1989
y
: Engine
or
W
level level level
-not OK
OK
I
1
.,
.~ ,_
_‘I
,.
’
/I.’
.;.
‘.
..d.’
.
(
_ -_
:,~
,
'_c
DIAGNOSIS
-
INSTRUMENT
OPERATING
LEVER
-,.^
L,‘.
:
..-..
operating
-
to to
the the
-
UPWARDS
~.r..-i..:
:: i,
928
CLUSTER
...-I
84
functions
- to the left of the steering The operating lever used to start the diagnosis as well as to select individual steps. The
,’
lever
can
FRONT REAR
start
= = =
=
- DOWNWARDS
operate
in
column - can be and activate the
4 planes.
DIAGNOSIS
execution
desired
- YES
execution execution
desired desired
- NO - YES
memory
(clear
only)
RULE
If
a question
appears
on the
display
during
diagnosis,
such
as
e.g.
this lever
question in order
must be answered to con+' -hue in
Operating
NOTE:
lever
Operating
Display
the
The
one
the
REAR = YES
exception
to
the
operating
this
Uiagnosis
step
- Execute
the
display.
rule:
:
If you wish to must be pressed If
is
to
NO by moving program. - Do not execute display. Jump to next
= NO
UPWARDS
lever
There
Exception:
with YES or the diagnosis
answer
contact
The contact connector
clear
the
error
DOWNWARDS
is
NO move
bridge
9293
bridge 9293 in the vehicle
the is
must for
-
memory for
(YES),
approx.
operating required
lever to
be plugged this.
the
operating
lever
1 5.
start
into
UPWARDS. diagnosis.
the
diagnosis-plug
NOTE: All other code letters called at this time, (Off Board Diagnosis).
1989
or
shown in checked
the with
central display box the PORSCHE System
cannot
be
Tester
9268
3
DIAGNOSIS 1.)
-
INSTRUMENT
ACTIVATING
928
CLUSTER
DIAGNOSIS
DISPLAY la.)
Turn
lb.)
Connect bridge
lc.)
on
2.)
ignition
:
contact 9293
..
Move operating to the FRONT approx. 3 s followed
CALLING
84
THE
I
3510
lever
I
OUTSIDE
:
I
for
by
(example)
CLUSTER
KM
PORSCHE
CONTROL
I
El I
I
I
code
to
185.5
KM I
+22.0 * "C
I
185.5
KM I
is
REAR,
I
l-l
I
I
1 t
TEMPERATURE
+22.0 * "C!
I letter
the
I
I
DIAGNOSIS
I
I
DIAGNOSIS
I
UNIT
Press the operating lever repeatedly UPWARDS or DOWNWARDS until the identification code K appears. If a non-assigned - operating lever
+22.0 * "'2
callecl,
the
e.g.
'A'
following
j____________l
K display
jAI
appears: /______________)
After a short waiting period the display changes :
1989
4
.-
DIAGNOSIS
,~.
-
‘/
:;
I
.,
INSTRUMENT
,_
:.
:
,:
..’
‘1
_,
.‘
..!:‘.“,:J
1
”
“.’
.
.I.,>.,
CLUSTER
928
CLUSTER
K.)INSTRUMENT
.
84
DIAGNOSIS
At the beginning of model year '89, the software status code K18 was fitted for the instrument cluster. The software was modified The subsequent new software status has during this model year. been assigned the code K21. In with
NOTE:
and
diagnosis
(at
order to read out all diagnosis the correct values, we recommend be carried out with the engine
steps without maloperation that the instrument cluster running
idle).
1
I
START
THE ENGINE
Operating
lever
to
the ..
Display
Kl.)
REAR
READING
THE FAULT
MEMORY
NOTE: The instrument
cluster software status K18 contains a fault data Service. memory, the content of which is of no significance to the the display indicates Once the last, existing fault has been read out, or jumps to the next any existing FAULT WARNING (diagnosis step Kl.l), diagnosis step K2. The instrument cluster software status K21 has no fault data Any existing FAULT WARNINGS (diagnosis step K1.l) are memory. indicated, otherwise the system jumps to the next diagnosis step K2.
Operating REAR:
lever
If NO, operating K1.2. 'YES' If operating REAR:
lever
to
the
lever
to
UPWARDS - Jump
to
the
next
diagnosis
step
the
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
To continue:
1989
operating
lever
to
the
REAR.
5
:’ ,‘,, ( c-
. ~..
DIAGNOSIS K1.1)
-
Fault
INSTRUMENT
‘.. ._,
are
warnings
OIL
PRESSURE
: in
h/min
OIL
LEVEL
: in
km
: in
h/min
: in
h/min
:
km
LEVEL
TEMPERATURE LEVEL
TOOTHED
BELT
‘.:‘.l
.’ ‘., ‘.
,.~ -i _‘L
84
in
: in
TENSION
the issued
duration on the
IKXXI’-
01:12
stored:
following
COOLANT
-5:.
928
display while driving, with this fault and
The
ENGINE
.’
display
WarninCl
FLUID
-‘.‘>
CLUSTER
If a warning is given in the and/or the journey is stored display during diagnosis.
BRAKE
:; _
h/min
Example:
IOIL
..
Display
PRESSURE I
I
I
Operating
lever
to
the
H
-4
REAR
:
Display etc. ..*.......*..........*..............................“.................
Fault warning the REAR.
display
TERMINATED
The fault warning display is disconnected or if the plug have been separated.
Note:
1989
- To continue:
is cleared connections
if of
operating
the the
lever
to
battery cable instrument cluster
6
’
:,
,; ‘I
(~
.-
I(,.
DIAGNOSIS K1.2.)
-
:
,_
,,..
THE
FAULT
Display
If
I_
.
~.._-.,.*.
~“.j
,.,
,‘,
.,/
,_..
operating
54
MEMORY
lever
UPWARDS - Jump
to
next
the
DRXVXNG
operating
lever
NO,
I
K2.
CLEARED
I
. . . . . . . . . . . . . . . . . . . . .
to
the
REAR.
ACTUATORS
:
operating
lever TANK DISPLAY. display - The tank indicate 40 1.
lever to
Operating
lever TANK DISPLAY: The tank display indicate 80 1.
Operating
I
step
1’
INSTRUMENT-CLUSTER
Display
diagnosis
Kxx
. . . . . . . . . . . . . ..*.................................
To continue:
Q
;.
928
If 'YESs operating lever DOWNWARDS for approx. 1 s :
If
,,-
:
NO,
K2.)
8.
.I,)
CLUSTER
INSTRUMENJT
CLEARING
*
the
UPWARDS, REAR:
jump
to
the
next
ACTUATOR1
diagnosis
/KXXI I
must
step
K3.
pi&l-l 1
to
the
REAR:
ACTUATOR1
p-j
must I
Operating lever to the The checkered DISPLAY changes inversely.
REAR:
ACTUATOR 03
rJ&i-j
I
I
I
I
1 1
1
I
I
DRIVEN
I
-2
Operating lever to the REAR: Only for vehicles with M 215 (Saudi Arabia): speed warning buzzer sounds. ... ..... ... ... ............... ........... .. .... .. ... ...... ........ ..... Drive actuators TERMINATED - To continue: operating lever to the REAR
1989
7
-
“yl
“I.
_’
DIAGNOSIS
INSTRUMENT
-
code code
Attention:
number number
j 1~ .., ,‘.”
NO - operating
Operating
without in
lever
lever
Each movement sensor.
to of
the
the
‘._.‘_
‘.‘w
;.
”
L j..:_l
LL’
.,
.‘.
,
:
_.:.
;s,-
928 () 0 I
If
.‘,._.,.
CLUSTER
SENSORS
K3.)
1.
= software = software
K18 K21
next
diagnosis
64
C K21 onlv
1
SENSORS
UPWARDS, jump
status status
,‘..‘.
.’
to
the
step
K3.1
REAR: operating
lever
to
the
COMPONENT CODE SENSOR ------------------------------------------------------------_________l________l_----------------------~------
REAR - jump
------------------------------
to
the
next
NOMINAL
VALUES
PHOTOTRANSISTOR
01
00 - 255 If the phototransistor is covered with your hand and/or the sidelight value (code) must be terminal 58d is switched on, the displayed The displayed value must be higher if the phototransistor smaller. illuminated externally. ---------------------------------------------------------------------02
INSTRUMENT 00 = switched 34 - 255
= switched
LIGHTING,
Terminal
Voltage Terminal
58d
1989
on 58d
off Code No. 16
on
When the instrument-potentiometer is adjusted, the value (code) must be reduced or increased accordingly. ------------_-_---__--------------------------------------------OUTSIDE TEMPERATURE ("C) 03 25 34 48 66 90 120 136 150 169 185 213 234 248 ----------------------------------
is
-
60" 50" 40" 30" 20" 10" 5" 0" 5" 10" 20" 30" 40"
------------------------------------
= Voltage
indicated (Sensor
---value(n))
750 1K 1.6 2.5 3.8 6 7.6 9.8 12.6 16.5 29 53 100
K K K K K K K K K K K
"
:.
1 .:.,
i
.-,q-
..~,J
DIAGNOSIS
K3.)
..2.‘.‘.
:
-
INSTRUMENT
/
3
,._,
,‘,
bl.
’
;
,I
‘91’
,, I::
.!” c.2’
928
.),
84
SENSORS
SENSOR
NOMINAL
COMPONENTS
CODE
VALUES
----l_---l____________________ --------------___________________
ENGINE
04
TEKPERATURE
(Sensor
(“C)
63 L 96( 81) 42 L 174(161) 21 L 227(218) 15 L(calibration 240(232) 12.5L 245(238) --_-_-----------_---------------------------------------~------------Terminal VOLTAGE, 06 96 112 128 144 166 176 129 208 224 240 255 _---_--_---_--______------------------------------------,-------------OIL PRESSURE INDICATION 07
4 reasons due to
on the 141 153 161 167 171 175 178 180 182 186 for different the tolerances
instrument
0.0 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 indications of the analog
value(n))
(22.5) (23.8) 25.5 26.5 29 38.5 51.5 70 97 137 198.5 293
(120") (118") (100) 106 115" 108 113.5" 114 110.5" 134 100" 156 90" 179 80" 201 70" 222 60" 50" 242 255 40" _______-__---_---_--__________________I_-----------------------------TANK LEVEL 05
( 97)
1989
‘i:,..?:.
CLUSTER
~,,,------------------------------------____________--_----_-----------------
The are
,,,
(Sensor
value(n)) 19.1 42.3 65.7 72.7 75.6
value)
(15.5) (37.8) (61.2) (68.4) (71.7)
15
6V 7v . .
Code No. 16
= Voltage .
16 V (bar)
(Sensor
on the display * * 0.0 0.6 * * 1.0 1.6 * * 2.0 * 2.4 (2.6) * 2.8 (3.0) 3.2 (3.7) * * 3.7 (4.2) * 4.5 (5.0) on instrument and instrument.
value(n))
10 29.6 48 65.3 82 99 116 133.6 151 184 display
9
7
^-
,-
L....
DIAGNOSIS
-
,~’
INSTRUMENT
_.
,.,.
_,..
.-Y
”
: ,.
928
CLUSTER
‘.
84
K3. ) SENSORS NOMINAL
COMPONENTS CODE SENSOR ______________--__--------------------------------------------------------------------_--_I_______I__________---~------------------------m-
OIL
08
on the
PRESSURE SENSOR instrument
29
70 97 116 131 143 153 162 169 180
(bar)
(Sensor
INDICATION : * on the 0.0 * 0.0 1.0 * 0.6 1.5 * 1.0 2.0 * 1.6 2.5 * 2.0 3.0 * 2.4 3.5 * 2.8 4.0 * 3.2 4.5 * 3.7 5.0 * 4.5
VALUES value(R))
display 10 29.6 48 65.3 82 99 116 133.6 151 184
(2.6) (3.0) (3.7) (4.2) (5.0)
The reasons for different indications on instrument are due to the tolerances of the analog instrument. -----__---_----------------------------------------------------------ALTERNATOR, Terminal 61 09
and
display
6V 7v
96
112 128 144 160 176 192 208 224 240 255
. .
Code No. 16
= Voltage .
15 v 16 V
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TO CONTINUE
- operating
K3.1)
VARIABLES
INPUT
lever
to
the
REAR.
Specific dynamic input variables of the instrument cluster may be shown with the correct unit. The display follows automatically after diagnosis step K3 'SENSORS CHECK?'. Operating
lever
to
the
REAR:
/OIL1
p&j
piz&l
Operating
lever
to
the
REAR:
/I
jj
piiizq
only the OIL PRESSURE and ENGINE SPEED can be At the present time, indications between the analog and digital called up. Differing display are OK as long as the analog display deviations are not value at 400 greater than +0.7 bar or _+ 1.5 % of the full-scale 2500 rpm. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..m.................. operating lever to the REAR Sensor diagnosis TERMINATED - To continue: 1989
aP J
1,
_:,.-
.~..:.L.-
DIAGNOSIS
‘.
“,
-
:^
INSTRUMENT
<“,I
4.
.“.-,
,I,
.:
..C’,.,..,
CLUSTER
928
-._/
84
/
f NO - operating Operating
lever
lever
Each movement switch.
to
of
the
UPWARDS,
the
jump
to
the
next
diagnosis
operating
lever
PARK BRAKE
to
the
REAR - Jump
ABS
MONITOR
next
Not operated Operated (-)
OPEN CLOSED OPEN
No function
CAT.
the
DISPLAY
System OK Not OK (-)
RDK
to
SWITCH
No function
06
K5.
REAR:
COMPONENTS SWITCH -------------------------------------------------------------------------------------------------------------------------------------------
03
step
OPEN CLOSED OPEN
Not installed Installed (-)
OPEN CLOSED
System Not.OK
OPEN CLOSED
OK (-)
No function
OPEN
08
WASHER WATER LEV.
Level OK Not OK (-)
OPEN CLOSED
09
COOLANT LEVEL
Level OK Not OK (-)
OPEN CLOSED
10
COOLANT PRESSURE
OK < 0.1 bar 2 0.1 bar (-)
OPEN CLOSED
1989
11
1.:
I.
.*
DIAGNOSIS
K4.)
-
INSTRUMENT
.,._.. _...s__j,_,
r
.’
._.
‘_).
_. :_
CLUSTER
:,.
_-,
,’
928
84
,:’
SWITCHES
SWITCH COMPONENTS SWITCH -------------------------------------------------------------------mm _______________-----_I__________________-----------------------------11
OIL
LEVEL
12
TOOTHED BELT
13
DISPLAY
OK>61 Not OK <6 1
OPEN CLOSED
Tension OK Not OK (+)
OPEN CLOSED
BRAKE PADS
Pad OK Not OK (-)
OPEN CLOSED
14
BRAKE FLUID
Level OK Not OK (-)
OPEN CLOSED
15
BRAKE-LIGHT
Not operated Operated (+)
OPEN CLOSED
16
BRAKE LIGHT
OK Not
OPEN CLOSED
TENS.
SWITCH
CENTRAL LOCKING
17
OK (-)
Not operated Operated (-)
OPEN CLOSED
18
No function
OPEN
19
No function
OPEN
TACHOMETER SIGNAL output
20
Rear turn
wheels
OPEN CLOSED
No function
21
OPEN
22
OIL-PRESSURE
SWITCH OK > 2.5 bar Not OK (-) < 0.25 bar
23
SAFETY BELT
Not closed Closed
OPEN CLOSED
24
TAIL
OK Not
OPEN CLOSED
LAMP
TACK0 RESET
25
OPEN CLOSED
OK (-)
Not operated Operated (-)
OPEN CLOSED
. . . . . . . . . . . . . ..*......................................................
Switch
1.989
diagnosis
TERMINATED
- To continue:
operating
lever
to
the
REAR
12
‘, Y,.: ::’ : ,,7
”
.
._
-
DIAGNOSIS
INSTRUMENT
,*
,1
;
‘-”
j ,.
(
i.,,.’
‘,’
.,
I,,
,‘,(
CLUSTER
.:’
‘ -,,
;
.L.
64
928
K5. ) SPECIFIC FUNCTIONS
operating program without connected).
time of the vehicle can be interrogated signal (driving without a tachometer
The
If
operating
'NO',
with this tachometer
SF
lever
UPWARDS.
operating lever If 'YES', to the REAR for approx. 6 s.
EXECUTE?
I
I
I
I
I
SF
K18 (K21)
'I
r
I
xxx/xx/xxx I'
200/08/165
Example:
SF code Value 1 Value 2 Calculation Failure
time
Failure
period
from
the
in
minutes in
I
I
I I
display:
hours
= (value
1 x 256)
+ value
2
= (value
1 x 256) 60
f
2
value
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specific Instrument REAR
functions cluster
Display
- Operating
j/
/I
:
To continue Interrupt If you appears
TERMINATED diagnosis TERMINATED
diagnosis
-
- switch
diagnosis forget when
to the
operating instrument
move the ignition
lever to cluster off
ignition,
lever
to
the
[DIAGNOSTSI
the REAR - repeat diagnosis. remove
the following contact bridge, is switched on again:
contact
bridge.
display
.k**kk.k******k*****kk*******~~t~k*~~tk~*kk~**.k*~***k*k**~k**k*********
TERMINATED
1989
13
:
.‘A:...
Dr.lng.h.c.F.Porsche Aktiengesellschaft Postfach 1108 D-7140 Ludwigsburg Service Division Technical Service Dept. Edited by Service Training
Center (VKTS)
Print: Beck & Co. Nachfolger,
D-7254 Hemmingen
2190 Photographs, descriptions and drawingsserve exclusively the presentation of the text. We cannot accept any liability for completeness or conformity of the contents of this publication with the pertinent legislative regulations. Subject to changes without prior notice on the basis of engineering progress. Not to be reproduced wholly or in part without written permission of Porsche Stuttgart. Copyright
by Dr. Ing. h. c. F. Porsche Aktiengesellschaft
Printed in W.-Germany
