T -S

Trouble-Shooting – ABS Teves MK

ABS T IVIV
MK
ROUBLE
EVES
HOOTING

Foreword

The Multi-Tester plus/pro software cassette and the corresponding

adapter are the components that give the diagnostic equipment its unique
test characteristics.
All the data required to make the test system operate are stored on the
software cassette.
The software cassette can easily be replaced enabling the Multi-Tester
plus/pro to be a adapted to the trouble-shooting job at hand.
These Trouble-Shooting Instructions describe how to use the software for
tracking faults in the Teves MK IV ABS system.
Multi-Tester plus/pro checks all signals that have bearing on the control
system and can also diagnose a faulty control unit.

Copyright AUTODIAGNOS
The contents of this document can be changed without notice and should not
therefore be regarded as binding on AUTODIAGNOS.
AUTODIAGNOS is not responsible for any errors which may appear in this document.
In any event, AUTODIAGNOS accepts no liability for any loss or damage arising from
the use of this document nor of the hardware or software described herein.
Neither the whole nor any part of this document may be copied, reproduced or
duplicated in any material form, except for personal use, without the prior written
approval of AUTODIAGNOS. Neither may the contents be passed on to third parties
or used in any other unauthorized manner.

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ABS TEVES MK IV CONTENTS

Contents
Foreword .......................................................................................................... 1
System Description - ABS Bosch 15/4 ............................................................. 3
General ABS-system ................................................................................... 3
The Teves MK IV system ............................................................................. 4
Users Guide ..................................................................................................... 5
Connection of equipment ............................................................................. 5
Starting the program .................................................................................... 6
Program structure ...................................................................................... 11
Programs and tests ........................................................................................ 12
Static test -
measurements which to be performed whith the car stationary ................. 13
Working procedure ................................................................................. 14
Static test ............................................................................................... 16
Monitor test – display measured values ..................................................... 17
Working procedure ................................................................................. 18
Monitor test ............................................................................................ 19
Running test – recording faults .................................................................. 20
Working procedure ................................................................................. 21
Fault messages ...................................................................................... 23
To delete recorded faults ........................................................................ 24
Running test ........................................................................................... 25
Fault detected ........................................................................................ 26
Fault Tracing .................................................................................................. 27
Locating Faults ............................................................................................... 35
Index .............................................................................................................. 41
Interface - Signal Locations ............................................................................ 42
Wiring Diagram .............................................................................................. 43
Hydraulic Diagram .......................................................................................... 44

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SYSTEM DESCRIPTION ABS TEVES MK IV

System Description - ABS Bosch 15/4

General ABS-system
The ABS brake system prevents the road wheel locking when braking so
enchancing directional stability and steering performance while reducing
the braking distance. Modern ABS systems are constructed using digital
technology and precision hydraulics. ABS stands for German "Anti-
Blockier-System" (Anti-Lock System).
Under normal conditions, when the wheels would not lock, the ABS
system is not active - the brake system then operates as it would on a car
not fitted with ABS. When the ABS system senses that a wheel is about to
lock up the braking force is regulated in two stages. Stage 1 is pressure
maintenance. In this phase the system prevents the pressure in the wheel
cylinder from increasing by blocking the hydraulic pipe running between
the brake master cylinder and the wheel cylinder in question. If that is
insufficient to prevent the wheel locking up then stage 2 is initiated –
pressure reduction. The pressure in the wheel cylinder is reduced in this
phase by hydraulic fluid being withdrawn from the wheel cylinder.
Wheel sensors are used in systems, 2-4 to determine if a wheel is about to
lock up. A sensor is sited at each front wheel and sometimes a further
sensor is fitted at the differential on the final drive or at each rear wheel
individually. Each wheel with a sensor is equipped with a sprocket whose
rotational speed the sensor measures.
The ABS control unit regulates a number of solenoids and occasionally a
pump to control the pressure in the hydraulic pipes.
If the ABS control unit detects a fault in the ABS system then the ABS
warning light ignites and the ABS system is disengaged. In such cases the
brake system operates as an ordinary system, that is without the effect of
ABS.
Some ABS-systems are combined with TRACS, which is a so called
anti-spin system'. The TRACS-system prevents the driving-wheels from
spinning during acceleration. If a wheel starts spinning the wheel will be
braked by the TRACS system using the hydraulic components of ABS and
some TRACS-specific components. When the spinning wheel regains its
correct speed the TRACS-system stops the braking. Some 'anti-spinn
systems' may temporarily limit the power of the engine.

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ABS TEVES MK IV SYSTEM DESCRIPTION

The Teves MK IV system

The system has 2, 3 or 4 pairs of valves. Each pair consists of one inlet
valve and one outlet valve. An inlet valve is positioned between the main
brake cylinder and a wheel cylinder. It is opened when the ABS-system is
passive and closed during the pressure maintenance and reduction
phases. An outlet valve is sited between a wheel cylinder and the brake
fluid reservoir. This only opens during the pressure reduction phase.

Phase Inlet valve Outlet valve

Passive open 12 V closed 12 V
Pressure maintenance closed 0 V closed 12 V
Pressure reduction closed 0 V open 0 V

The hydraulic part of the system includes an electric pump, which provides
high pressure brake-fluid for building up the pressure after the pressure
reduction phase. When ABS is combined with TRACS an additional valve is
included for this funktion. The system has two or four wheel speed sensors.

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USERS GUIDE ABS TEVES MK IV

Users Guide
Connection of equipment
1 Preparations Disconnect positive battery ABS-control unit disconnected
terminal!

Switch off ignition!

➡
➡
0

2 Connect system interface, adapter and program cassette

Signal cable

ABS interface

F1 F2 F3

YES NO

Car wiring system

HELP

EXIT ENTER

Adapter Multi-Tester pro

Program cassette

3 Connect power supply

Power supply

Red Black

Caution!
To prevent damaging the memory the Multi-Tester plus/pro must always
be dis-connected from any power supply before it is opened and a new
software cassette installed. Do not expose the tester to direct sunlight or
extreme heat for a prolonged period as this may damage the display.

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ABS TEVES MK IV STARTING THE PROGRAM

Starting the program

General
The program is re-started each time the power supply is interrupted and re-
connected. When the supply is interrupted any faults and pre-sets recorded
in memory are deleted.
At any particular moment, those keys which are not required are disabled.
If such a key is pressed, the unit emits a long beep signal.
The program starts automatically when the Multi-Tester plus/pro is
connected to the power supply. The unit executes steps 1 to 4 and pauses
at step 5.

Working procedure
1. All fields in the display are tested
(i.e. are illuminated),
Multi-Tester plus only
If no software cassette is installed or
the cassette is incorrect, only the first
and third row become illuminated.
At this point the display’s contrast can
be adjusted. Adjust the potentiometer
to right of the switch inside the
cassette opening (using a small
screwdriver).

2. The Multi-Tester plus/pro

performs a self-test....
SELF-TEST OK

AUTODIAGNOS 3. ...and identifies the current

MULTITESTER versions of the hardware and
XXXXXXXXXXXXXXXX software.
VER:XXXXXXXXXXXX

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STARTING THE PROGRAM ABS TEVES MK IV

4. The adapter connected ADAPTER CONNECT.

The Multi-Tester plus/pro confirms XXXXXXXXXXXXXXXX
which adapter is connected and
displays this information. Is the infor- ENTER
mation on row 2 correct? Respond by
pressing ENTER.
This message is displayed if the adapter WRONG ADAPTER
which is connected to the Multi-Tester CONNECTED
plus/pro is of the incorrect type, i.e. not
combined with the appropriate software ENTER
cassette.
If the adapter is not connected to the NO ADAPTER
unit, the message NO ADAPTER CONNECTED
CONNECTED is displayed.
ENTER

If the wrong ABS interface is connected, NO ABS-INTERFACE

this is indicated in the display window. CONNECTED

ENTER

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ABS TEVES MK IV STARTING THE PROGRAM

5. Questions during initialization

The Multi-Tester plus/pro has to know
certain things about the system that is
going to be tested. Therefore you have
to answer some questions concerning
the number of sensors and pairs of
valves, the number of cogs per
sprocket and if the system includes
TRACS (see the workshop manual if
unsure).
2 SENSORS
4 SENSORS Multi-Tester plus/pro asks how many
wheel speed sensors that the current
↑ /↓ /ENTER/EXIT ABS-system has. The ↑/↓ keys move
the cursor from one row to another.
If you press ENTER you choose the
alternative that the cursor indicates
(see workshop manual).
2 PAIRS OF VALV.
3 PAIRS OF VALV. The Multi-Tester plus/pro here asks
4 PAIRS OF VALV. how many pairs of inlet- and outlet
↑ /↓ /ENTER/EXIT valves that the current ABS-system
has. Two pairs means two inlet valves
and two outlet valves, that is a total
number of four valves. If the number
of valves is odd it is likely that the car
is equipped with TRACS (see work-
GROUND PIN AT shop manual).
ABS #19?
Here you should state whether pin no.
YES/NO/EXIT 19 in the 55-pole connector is
connected to ground or not. An easy
way of finding that out is to look if
there if there is a connection at
position 19 in the 55-pole connector.
If that is the case reply YES.

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STARTING THE PROGRAM ABS TEVES MK IV

12

Here you should state whether pin no. BATTERY AT

35 in the 55-pole connector is ABS #35?
connected to the battery plus pole or
not. An easy way of finding that out is YES/NO/EXIT
to look if there is a connection at
position 35 in the 55-pole connector.
If that is the case reply YES.
If the car has TRACS and this
DOES THE CAR
function is carried out by the ABS-
HAVE TRACS
ECU you should answer YES to this
question. Cars equipped with TRACS
YES/NO/EXIT
often have high engine power, and
there is an indicator at the dashboard.
Multi-Tester plus/pro asks how many 46 COGS/SPROCKET
cogs that the sensor sprockets have 44 COGS/SPROCKET
(see workshop manual). OTHER NUMER
If you cannot get that piece of infor- ↑ /↓ /ENTER
mation you can guess. If you state the
wrong number this only results in
wrong values in the Monitor tests
'Eccentricity' and 'wheel speed'.
If you have anwered OTHER NUMBER to
NO. OF GOGS: 44
the question above, you will get this
CHANGE NUMBER
question. In the upper right corner of
WITH ARROWKEYS
the display a number is shown. You
↑ /↓ /←/→ /ENT/EXIT
can change this number with the
arrow-keys. ↑/↓ arrows change the ten
and ←/→ arrows the unit. When this
number corresponds to the number of
cogs for the current system you press
ENTER. 5
STATIC TEST
6. Choice of test MONITOR TEST
This is the entry point for the Monitor RUNNING TEST
test and Running test. Select the ↑ /↓ /ENTER/EXIT
desired test with the aid of the arrow
keys. Press ENTER.

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ABS TEVES MK IV STARTING THE PROGRAM

7. Cancel
To cancel work with the Multi-Tester plus/pro:
• Switch off engine.
• Disconnect the power cable from the unit.
• Disconnect the battery’s positive terminal.
• Remove the adapter and re-connect the car’s wiring harness to the
control unit.
• Re-connect the battery’s positive terminal.

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PROGRAM STRUCTURE ABS TEVES MK IV

Program structure

SELF-TEST

Start menus
AUTODIAGNOS
MULTI-TESTER
XXXXXXXXXXXXXXXX
VER:XXXXXXXXXXXX

ADAPTER CONNECTED
XXXXXXXXXXXXXXXX

ENTER

Questions which depend

upon manufacturer,
model, etc.

STATIC TEST
EXIT >MONITOR TEST <
RUNNING TEST
Choice of test ↑ /↓
↓ /ENTER/EXIT

STATIC TEST MONITOR TEST RUNNING TEST

Choose the test to be Condition:

performed. Fault present

Condition:
Fault present FAULT DETECTED
EXIT

HELP HELP

FAULT MESSAGE FAULT MESSAGE

EXIT
HELP HELP

HELP MESSAGE HELP MESSAGE

EXIT

DELETE RECORDED
FAULTS

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ABS TEVES MK IV PROGRAM AND TESTS

Programs and tests

Summary
The following types of tests are available:

Static test - shows measurement signals and faults

In the Static test, certain components in the ABS system of the car are
activated by Multi-Tester plus/pro. For reasons of safety the car should
therefore be stationary during the test. No signals or fault messages are
stored in the memory.

Monitor test - displays measurement signals

Multi-Tester plus/pro displays the signals continuously. It displays different
signals, depending on which control system is connected. No signals are
stored in the memory.

Running test - registers and stores faults

When the signal has been scanned, the microprocessor in the instrument
compares the input signals to the control system with pre-programmed
standard values.
Any deviation, i.e. a fault, is read and stored by the instrument. The interval
between two readings depends on the type of signals being registered.
Up to five faults can be stored every time a Running test is performed. If a
fault is detected and stored, the letter “F” appears on the display. If you
wish, Multi-Tester plus/pro will display a brief description of the fault.
Help messages and status messages provide further information.

Priority
General
A primary fault may generate secondary faults. Multi-Tester plus/pro
compares primary and secondary faults and shows only the primary,
essential fault.

Order of priority
• Voltage supply
• Ground connections to the control system
• Other signals

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PROGRAM AND TESTS ABS TEVES MK IV

Static test -
measurements which to be performed whith the car stationary

General
The Static Test can be regarded as a development of the Monitor Test.
The main difference between the two is that in the Static Test the Multi-
Tester plus/pro activates some of the components in the car’s ABS system,
while in the Monitor Test the Multi-Tester plus/pro has a purely passive role.
• In the Static test, neither the readings nor any error messages that may
appear are stored.
• At any particular moment, those keys which are not required are disabled.
If such a key is depressed, the unit emits a long beep signal.

The following measurements are made:

SENSOR RESISTANCE: Resistance of the sensors (kΩ)

VALVE RESISTANCE: Resistance of the valves (Ω)
VALVE/PUMP RELAY TEST: The ABS interface attempts to
energize the relay (certain cars only)
BRAKE PEDAL TEST: Checks whether the stop lamp switch
is working (certain cars only)

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ABS TEVES MK IV PROGRAM AND TESTS

>STATIC TEST < Working procedure

MONITOR TEST
1. Starting Static test
RUNNING TEST
The entry point is the “Choice of test”
↑ /↓ /ENTER/EXIT
menu. In order to display this menu,
follow steps 1–6 in the “Starting the
program” section.
Select STATIC TEST (using the arrow
keys) then press ENTER.

SENSOR RES TEST 2. Static test menu

VALVE TEST Here you can choose which measure-
BRAKEPEDAL TEST ments to do. The measurements that
↑/↓/ENTER/EXIT can be chosen in this menu depend on
which system is being tested and
which program version is running in
Multi-Tester plus/pro. You choose the
measurement function with the arrow
keys ENTER.

3. Start/stop engine
START ENGINE
For some of the measurements in the
WITHIN 20 SECS
Static test the engine must be
running. If one of these has been
EXIT
chosen and the engine is not running,
a message appears on the display.
IGNITION SWITCH
VOLTAGE MISSING
ABS # 4:1
EXIT / HELP

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PROGRAM AND TESTS ABS TEVES MK IV

4. Measurements in Static test SENSORRES. (kOhm)

In certain case, when you choose a FL: 1.0 FR: 0.9
measurement function from the menu, RL: >7 F RR: 1.0
several tests may be done EXIT / HELP
automatically by Multi-Tester plus/
pro. The test sequence performed
depends on the system being tested. FL = front left
FR = front right
When analog measurements are done,
RL = rear left
a message like the one on the right
RR = rear right
usually appears. The first line states
R = back
which measurement has been done.
The second and third lines show the
readings. The fourth line shows which
keys are available for use.
If there is an ”F” after the reading,
the reading is incorrect. To see fault
and help texts, press HELP.

5. Ending the test

If you press EXIT at any time during a
Static test, you are returned to the
”Static test” menu. There you can
choose to make a new measurement or
press EXIT to return to the ”Choice of
test” menu.

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ABS TEVES MK IV PROGRAM AND TESTS

Static test

Use ↑ /↓
↓ >STATIC TEST<
to change MONITOR TEST
RUNNING TEST
↑/↓/ENTER/EXIT

ENTER

SENSOR RES TEST

VALVE TEST EXIT
BRAKEPEDAL TEST
↑/↓/ENTER/EXIT

ENTER EXIT

SENSORRES. (Ohm)
FL: >5F FR: 1.2
R: 0.5F
EXIT/HELP

HELP EXIT EXIT

1st FAULT 4th FAULT

↑ /↓
↓
MESSAGE MESSAGE

↑/↓
↓ /EXIT/HELP ↑/↓
↓ /EXIT/HELP

HELP HELP

HELP HELP
EXIT MESSAGE MESSAGE EXIT

EXIT/HELP EXIT/HELP

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Monitor test – display measured values

General
• In Monitor test the values are continously displayed and are not recorded.
• At any particular moment, those keys which are not required are
disabled. If such a key is depressed, the unit emits a long beep signal.
See even Static test.

Measurements based on sensor signals.

WHEEL SPEED: Rotation speed of wheels in rev/s.

AMPLITUDE: Mean of peak values of the sine waves that are

the sensor signals in volts.

ECCENTRICITY: A measure of the difference in amplitude between

different sections of the toothed wheel as a
percentage of the mean value of the amplitudes.

VOLTAGES: For example, terminal 15 and alternator voltage

in volts (battery voltage, alternator signal and
supply from main relay are about 0 V if the motor
is not running).

Caution! If the display is to be read whilst driving the test

should be performed by two people.

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ABS TEVES MK IV PROGRAM AND TESTS

STATIC TEST Working procedure

>MONITOR TEST <
1. Starting Monitor test
RUNNING TEST
The entry point is the “Choice of test”
↑ /↓ /ENTER/EXIT
menu. In order to display this menu,
follow steps 1–6 in the “Starting the
program” section.
Select MONITOR TEST (using the arrow
keys) then press ENTER.

2. Monitor menu
WHEELSPEED
Here you can choose which para-
AMPLITUDE
meters you want to look at. The para-
ECCENTRICITY
↑ /↓ /ENTER/EXIT
meters that can be chosen in this
menu depend on which system is
being tested and which program
version is being run in Multi-Tester
plus/pro. Use the arrow keys and
ENTER to choose parameters.

WHEELSPEED (RPS) 3. Parameters

FL: 10 FR: 10 The first line shows which parameter
RL: 10 RR: 10 is being displayed. The second and
↑ /↓ /EXIT third lines show the values. The
fourth line shows which keys can be
used. When you have chosen a para-
meter you can change to another para-
meter with the arrow keys. There is
no need to go back to the Monitor
menu to choose a new parameter.

4. Terminating tests
If you press EXIT when a signal group
is displayed, you are returned to the
Monitor menu. There you can choose
to look at any signal group or press
EXIT to return to the ”Choice of test”
menu.

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Monitor test

STATIC TEST
>MONITOR TEST < Use ↑/↓
RUNNING TEST to change
↑/↓/ENTER/EXIT
ENTER

WHEELSPEED
AMPLITUDE Use ↑/↓
ECCENTRICITY to change
EXIT
↑/↓/ENTER/EXIT
ENTER

WHEELSPEED (RPS)
FL: 10 FR: 10
RL: 10 RR: 10 EXIT
↑/↓/EXIT

↓ ↑

AMPLITUDE (V)
FL: 1.4 FR: 1.8
RL: 0.9 RR: 1.6
↑/↓/EXIT EXIT

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ABS TEVES MK IV PROGRAM AND TESTS

Running test – recording faults

General
This test is used to detect incorrect input signals to the various ABS-
systems. An fault is recorded if a signal deviates from its pre-programmed
standard value. The fault is recorded until it is deleted manually or the
power supply is interrupted.

• Up to five faults can be recorded each time Running is executed.

• Each primary fault can lead to a number of secondary faults.
• The Multi-Tester plus/pro stores all faults (primary and secondary)
temporarily and offers an assessment of which is the primary fault.
This is important in order to carry out repair work. Fault information is
saved and displayed.
• The same fault cannot be recorded twice in succession.
• At any particular moment, those keys which are not required are disabled.
If such a key is depressed, the unit emits a long beep signal.
• Running can be executed either in the workshop or under driving
conditions (to obtain a complete test, the test must be done when
running on the road.
• The test of the sensor signals in Running test only starts once the car
has reached a set speed. The speed depends on the number of teeth per
wheel and the circumference of the tire. A speed of just over 5 mph
(7 km/h) is sufficient for a system with 96 teeth per wheel, while a
24-tooth system needs just over 20 mph (30 km/h). In this respect it
does not matter what number of teeth you have stated to the tester. It
is the actual number of teeth per wheel that determines the speed limit.
Diagnosis of the wheel sensors is based on frequency. When the
frequency from one wheel sensor differs significantly from the other
sensors, a fault is registered. This means that faults may be registered
even if one wheel slips, even though the sensor is OK.
Caution! If the display is to be read whilst driving the test
should be performed by two people.
An fault can be recorded the moment Running starts. The Multi-Tester
plus/pro emits a beep and the letter F is displayed when an fault is
detected. Instructions for retrieving the fault from memory together with
a description of fault, help and status messages are described in the “Fault
messages” section.
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PROGRAM OCH TESTS ABS TEVES MK IV

Working procedure
1. To start Running test
The entry point is the “Choice of test” STATIC TEST
menu. To display this menu, follow MONITOR TEST
steps 1–6 in the “Starting the pro- >RUNNING TEST <
gram” section. Select RUNNING TEST ↑ /↓ /ENTER/EXIT
(using the arrow keys). Press ENTER.

2. Start the engine START ENGINE

If the engine is already running the WITHIN 20 SECS
message is not displayed. Instead the
next menu is displayed. EXIT
Comment
If the engine is not started within 20
seconds, and fault is registered (i.e.
NO SUPPLY FROM IGNITION SWITCH is
displayed).

3. No faults detected TEST OK

The Multi-Tester plus continues to STILL RUNNING
compare the signals from the control
system with the pre-programmed EXIT
tolerance levels and records any faults
which occur. The test continues until
EXIT is pressed or the power supply is
interrupted.
Testing under driving conditions can
now begin.

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FAULT DETECTED 4. Fault detected

TO CHECK FAULT When an fault is detected the unit
PRESS HELP emits a beep and the letter F is dis-
EXIT/HELP F played. Instructions for retrieving the
fault from memory together with a
description of fault, help and status
messages are included in the “Fault
messages” section.

END OF TEST 5. If the engine is switched off

NO FAULT FOUND If the engine is switched off, the
message END OF TEST is displayed.
EXIT/HELP FAULT EXISTS is displayed if an fault
has been recorded. The test continues
if the engine is re-started.
NO FAULT FOUND appears when the
system is functioning normally.

6. Terminating the test

STATIC TEST
The test is cancelled by pressing EXIT,
MONITOR TEST
when the “Choice of test” menu is
RUNNING TEST
displayed. Recorded faults are re-
↑ /↓ /ENTER/EXIT
tained in memory until they are either
deleted manually or the power supply
is interrupted.

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Fault messages

1. Fault detected FAULT DETECTED

The letter F is displayed, or, if the TO CHECK FAULT
engine is switched off, the text FAULT PRESS HELP
DETECTED. EXIT/HELP F
Interrupt the test by pressing EXIT.
The unit returns to the “Choice of
END OF TEST
test” menus. Otherwise proceed to
FAULT EXISTS
display the number of faults by
pressing HELP.
EXIT/HELP

2. Number of faults TOTAL NUMBER OF

The number of faults detected appears FAULTS: (1-5)
on the display. A maximum of 5 faults
can be recorded each time Running test EXIT/HELP
is executed. Each fault has the following
information associated with it:
• Fault message
• Help message

3. Fault messages
Press HELP to display the fault
message. Use EXIT to return to the
FAULT FRONT R.
TOTAL NUMBER OF FAULTS menu.
WHEEL-SENSOR
ABS #15:5/10
↑ /↓ /EXIT/HELP

HELP

CHECK CLEARENCE
& RES. IN SENSOR
ABS #15:5/10
EXIT/HELP

HELP

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To delete recorded faults

TOTAL NUMBER OF 1. Start

FAULTS: (1-5) To delete faults, start from this point.

EXIT/HELP

TO DELETE FAULTS 2. To delete faults

PRESS EXIT Depress the EXIT key for at least 5
> 5 SEC. seconds. If EXIT is not pressed within 3
seconds the unit returns to the TEST OK
STILL RUNNING message automatically.

FAULTS WILL BE 3. Delete faults.

DELETED All faults are deleted simultaneously.
5..4..3..2..1

STATIC TEST 4. Exit delete

MONITOR TEST When all faults have been deleted, the
RUNNING TEST instrument returns to the “Choice of
↑ /↓ /ENTER/EXIT test” menu.

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Running test

STATIC TEST
MONITOR TEST
>RUNNING TEST <
↑/↓/ENTER/EXIT

ENTER

START ENGINE

EXIT

TEST OK
Yes STILL RUNNING
There is an old fault.
EXIT/HELP F

No New fault

EXIT TEST OK FAULT DETECTED

STILL RUNNING TO CHECK FAULT
FAULT FOUND
PRESS HELP
EXIT TO STOP: EXIT

Ignition off

Ignition off

END OF TEST
FAULT EXISTS

END OF TEST
NO FAULT FOUND

EXIT Engine started

Engine started
EXIT

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Fault detected

FAULT FOUND TEST OK

TO READ FAULT STILL RUNNING
MESS. PRESS HELP
TO STOP: EXIT EXIT / HELP F

HELP EXIT

TOTAL NUMBER OF 1st FAULT 5th FAULT

↑/↓
FAULTS: (1-5) HELP MESSAGE MESSAGE

EXIT / HELP EXIT EXIT / HELP

EXIT / HELP

EXIT HELP HELP

EXIT

* TO DELETE FAULTS HELP HELP

PRESS EXIT MESSAGE MESSAGE
> 5 SEC
EXIT / HELP EXIT / HELP

EXIT

FAULTS WILL
BE DELETED
5..4..3..2..1 * Occurs automatically after 3 seconds

STATIC TEST
MONITOR TEST
RUNNING TEST
↑ /↓
↓ /ENTER/EXIT

26 A 01090224-1
 TROUBLE-SHOOTING
FAULT TRACING ABS TEVES MK IV

Fault Tracing
Pin 1 Ground
MONITOR STATIC RUNNING
”#1 GND” (OK/ERROR) Not tested. Continuous check of
ground level. Desired
value: approx. 0 V
See chapter
Locating Faults ➧4
Pin 2 Valve outlet front left (OFL)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 3-5 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 7.0 Ω Locating Faults ➧6
Pin 3/33, 34 Control of and power supply from main relay
MONITOR STATIC RUNNING
Not displayed. The relay control (pin Not tested.
34) is activated and the
voltage levels at pin 3
and 22 are measured.
Desired value: >11 V
A fault is registered for See chapter
levels less than 7 Volts. Locating Faults ➧3
Pin 13/26 Pressure switch for TRACS
MONITOR STATIC RUNNING
"#13/26 PRS" Not tested. Not tested.
(CLOSED/OPEN)

A 01090224-1 27
TROUBLE-SHOOTING
ABS TEVES MK IV FAULT TRACING

Pin 15 Pump relay control

MONITOR STATIC RUNNING
Not displayed. The pump relay is Not tested.
activated (pin 15) and
the amplitude and the
frequency of the sensor
signal are measured. If
the amplitude is lower
than 0.5 V a fault will See chapter
be registered. Locating Faults ➧9
Pin 16/41 Pedal position sensor
MONITOR STATIC RUNNING
"#16/41 PED." (kΩ) The brake pedal should Not tested.
be depressed and See chapter
released on instruction. Locating Faults ➧8
Pin 18 Valve outlet rear right (ORR) or front right
(OFR)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 3–5 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 7.0 Ω Locating Faults ➧6
Pin 19 Ground
MONITOR STATIC RUNNING
”#19 GND” Not tested. Continuous check of
(OK/ERROR) ground level. Desired
value: approx. 0 V
See chapter
Locating Faults ➧4

28 A 01090224-1
 TROUBLE-SHOOTING
FAULT TRACING ABS TEVES MK IV

Pin 20 Valve inlet front left (IFL)

MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 6-8 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 9.0 Ω Locating Faults ➧6
Pin 21 Valve outlet front right (OFL)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 3-5 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 7.0 Ω Locating Faults ➧6
Pin 23 Diagnosis
MONITOR STATIC RUNNING
Not displayed. Not tested. Not tested.

Pin 25 Switch for TRACS

MONITOR STATIC RUNNING
"#25 TRACS" (ON/OFF) Not tested. Not tested.

Pin 27/45 Rear right wheel sensor

MONITOR STATIC RUNNING
Wheel speed (revs/secs.) Check of resistance. Pulse control at speeds
Amplitude (V) Desired value: higher than approx.
Eccentricity (%) approx. 1 kΩ 30 km/h. Depending on
Min: 0.5 kΩ no. of cogs/sprocket and
Max: 2.0 kΩ the circumference of
the tire.
See chapter
Locating Faults ➧7
A 01090224-1 29
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ABS TEVES MK IV FAULT TRACING

Pin 28/46 Rear left wheel sensor

MONITOR STATIC RUNNING
Wheel speed (revs/secs.) Check of resistance. Pulse control at speeds
Amplitude (V) Desired value: higher than approx.
Eccentricity (%) approx. 1 kΩ 30 km/h. Depending on
Min: 0.5 kΩ no. of cogs/sprocket and
Max: 2.0 kΩ the circumference of
the tire.
See chapter
Locating Faults ➧7
Pin 29/47 Front right wheel sensor
MONITOR STATIC RUNNING
Wheel speed (revs/secs.) Check of resistance. Pulse control at speeds
Amplitude (V) Desired value: higher than approx.
Eccentricity (%) approx. 1 kΩ 30 km/h. Depending on
Min: 0.5 kΩ no. of cogs/sprocket and
Max: 2.0 kΩ the circumference of
the tire.
See chapter
Locating Faults ➧7
Pin 30/48 Front left wheel sensor
MONITOR STATIC RUNNING
Wheel speed (revs/secs.) Check of resistance. Pulse control at speeds
Amplitude (V) Desired value: higher than approx.
Eccentricity (%) approx. 1 kΩ 30 km/h. Depending on
Min: 0.5 kΩ no. of cogs/sprocket and
Max: 2.0 kΩ the circumference of
the tire.
See chapter
Locating Faults ➧7

30 A 01090224-1
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FAULT TRACING ABS TEVES MK IV

Pin 31, 49 Pump sensor signal

MONITOR STATIC RUNNING
Not displayed. The pump relay is Not tested.
activated (pin 15) and
the amplitude and the
frequency of the sensor
signal are measured. If
the amplitude is lower
than 0.5 V a fault will See chapter
be registered. Locating Faults ➧9
Pin 32 Brake light switch
MONITOR STATIC RUNNING
"# 32 BRAKEL." Brake pedal test. Not tested.
(ON/OFF) See chapter
Locating Faults ➧5
Pin 35 Battery voltage
MONITOR STATIC RUNNING
"#35 BATT" Not tested. Continuous test of
(OK/ERROR) voltage level.
Desired value: >11 V
See chapter
Locating Faults ➧1
Pin 36 Valve outlet rear (OR), rear left (ORL) or rear
right (ORR)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 3–5 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 7.0 Ω Locating Faults ➧6

A 01090224-1 31
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ABS TEVES MK IV FAULT TRACING

Pin 37 Valve TRACS

MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 6–8 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 9.0 Ω Locating Faults ➧6
Pin 38 Valve inlet front right (IFR)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 6–8 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 9.0 Ω Locating Faults ➧6
Pin 44 TRACS-light
MONITOR STATIC RUNNING
"#44 T-LIGHT" Not tested. Not tested.
(ON/OFF) See chapter
Locating Faults ➧ 10
Pin 52 ABS-light
MONITOR STATIC RUNNING
"#52 A-LIGHT" Not tested. Not tested.
(ON/OFF) See chapter
Locating Faults ➧ 10

32 A 01090224-1
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FAULT TRACING ABS TEVES MK IV

Pin 53 Power from ignition switch (terminal 15)

MONITOR STATIC RUNNING
"#53 BATT" (V) Not tested.
Continuous test of
voltage level. Voltage
below 7.0 V for 300 ms
max. is interpreted as
an intermittent fault.
Lower voltage over a
longer period is inter-
preted as ignition off.
Desired value: >11 V
See chapter
Locating Faults ➧2
Pin 54 Valve inlet rear (IR), rear left (IRL) or front left
(IFR)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 6–8 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 9.0 Ω Locating Faults ➧6
Pin 55 Valve inlet right rear (IRR), or right front (IFR)
MONITOR STATIC RUNNING
Not displayed. Check of resistance. Not tested.
Desired value: 6–8 Ω
The limits for fault-
registration are:
Min: 2.0 Ω See chapter
Max: 9.0 Ω Locating Faults ➧6

A 01090224-1 33
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ABS TEVES MK IV BLANK PAGE

34 A 01090224-1
 TROUBLE-SHOOTING
LOCATING FAULTS ABS TEVES MK IV

Locating Faults

1
Check of voltage feed from battery, ABS pin 35
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. Measure the voltage between the ABS control unit pin 35 and ground.
Desired value: > 11 V
Possible cause of fault: Fuse.
3. Measure the resistance of the cable between the ABS unit pin 35, and
the fuse-holder. Desired value: 0–1 Ω
4. Measure the resistance of the cable between the fuse-holder and the
battery plus pole. Desired value: 0–1 Ω

2
Check of power supply from ignition switch (terminal 15),
ABS pin 53
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. Start engine.
3. Measure the voltage between pin 53 and ground. Desired value: > 11 V
4. Turn off engine.
5. Measure the resistance of the cable between the ABS unit pin 53, and
the ignition switch. Desired value: 0–1 Ω

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TROUBLE-SHOOTING
ABS TEVES MK IV LOCATING FAULTS

3
Check of main relay control signal, ABS pin 34, and feed
from main relay, ABS pin 3 and 33.
No feed from main relay to neither ABS pin 3 nor 33:
1. Check main relay fuse.
2. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
3. Measure the resistance of the cable between ABS control unit pin 3, 33
and 34 and the main relay. Desired value: 0–1 Ω
4. Measure the resistance of the cable between the main relay and
the fuse-holder, and between the fuse-holder and the ignition switch
and the battery. The correct reading is: 0–1 Ω
If the reading is correct: replace the relay and repeat the test with
Multi-Tester plus/pro.
No feed from main relay at ABS pin 3 or pin 33:
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. Measure the resistance between the ABS control unit pin 3 and 33.
Desired value: 0–1 Ω
3. Check the wiring to the ABS control unit pin 3 and 33 and from the
main relay.

4
Check of ground connection, ABS pin 1 and 19
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. Measure the resistance between the ABS control unit pin 1 and ground.
Desired value: 0–1 Ω
3. If there is a ground connection at ABS pin 19: Measure the resistance
in the wiring between ABS pin 19 and ground. Desired value: 0–1 Ω
Possible cause of fault: Wiring or connectors.

36 A 01090224-1
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LOCATING FAULTS ABS TEVES MK IV

5
Check of brake light switch, ABS pin 32
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. Turn on ignition, depress brake pedal and measure the voltage between
ABS pin 32 and ground.
The voltage should be higher than 11 V approx. with the pedal
depressed. The voltage should be 0 V approx. with the pedal released.
Incorrect reading: check the the brake light switch and wiring between
the switch and the ABS control unit.

6
Check of valves and their wiring, ABS pin 2, 18, 20, 21, 36,
37, 38, 54 and 55
The braking pressure is regulated in the Teves MK IV ABS system using
an inlet valve and an outlet valve for each brake circuit. The system has 2,
3 or 4 brake circuits. Thus it has 4, 6 or 8 valves for ABS-regulation. If the
ABS-system is combined with TRACS it also contains a TRACS-valve. All
valves are controlled by the ABS control unit through separate outputs.
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. If a fault is indicated for all valves, measure the resistance between the
main relay (see workshop manual) and ABS control unit pin 3.
Desired value: 0–1 Ω
3. If the error text shows a fault in one individual valve, measure the
resistance across the valve block (see relevant workshop manual for the
pin no. of the car you are working on).
Desired value: 3–5 Ω (outlet valves)
Desired value: 6–8 Ω (TRACS- and inlet valves)
Possible cause of fault: Valve block.
4. Measure the resistance of the cable connecting the valve reported
incorrect and the ABS control unit. (see relevant workshop manual for
the pin no. of the car you are working on). Desired value: 0–1 Ω

A 01090224-1 37
TROUBLE-SHOOTING
ABS TEVES MK IV LOCATING FAULTS

7
Check of wheel sensors and their wiring, ABS pin 27, 28, 29,
30, 45, 46, 47 and 48
The wheel sensors record the rotational speed of the wheels through a
sprocket. The signal is passed on to the ABS control unit which uses the
data to determine if any of the wheels are about to lock up while braking
is under way. The ABS system is then activated.

Resistance too high:

1. Measure the resistance directly across the wheel sensors in question.
Desired value: 0.7–1.5 kΩ
Possible cause of fault: Wheel sensor.
2. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
3. Take a measurement in the wiring between the ABS control unit and
the sensors in question. Desired value: 0–1 Ω

Resistance too low:

1. Measure the resistance directly across the wheel sensors in question.
Desired value: 0.7–1.5 kΩ
Possible cause of fault: Wheel sensor.
2. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
3. Disconnect the sensor from its extension cable and measure the resistance
between the signal and ground wires for each respective sensor (eg. pin 27
and 45 for sensor rear right). Desired value: 100 kΩ
Possible cause of fault: Extension cable, connectors and the 55-pin
harness for short circuits.

No sensor signal:
1. Check the sprocket for mechanical damage or if a cog has become blocked
with dirt.
2. Measure the clearance between the sensor and the sprocket through-
out one complete revolution and compare with the data in the workshop
manual. Adjust if necessary. (See workshop manual).
3. Go through the checklist under ’Resistance too high’ and ’Resistance too
low’.
38 A 01090224-1
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LOCATING FAULTS ABS TEVES MK IV

8
Check of the pedal sensor and its wiring, ABS pin 16 and 41
1. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
2. Connect an ohm meter between ABS pin 16 and 41.
3. Release the brake pedal. Desired value: 250 ±25 Ω
Possible cause of fault: Wiring between the pedal sensor and the
harness.
4. Turn off ignition and shortcircuit ABS pin 1, 2, 18, 21, 34 and 36 with
banana plugs.
5. Turn on ignition and depress the brakepedal completely. Then turn off
ignition. The ignition must not be turned on more than 20 seconds.
6. Release the brakepedal slowly and check the ohm meter. Seven distinct
resistance values should be read. They are:

Position Ω)
Resistance (Ω)
7 infinite (completely depressed)
6 1030 ±100
5 820 ±180
4 690 ±170
3 560 ±160
2 440 ±145
1 250 ±125 (completely released)

If any of the readings is incorrect: Replace the pedal sensor.

A 01090224-1 39
TROUBLE-SHOOTING
ABS TEVES MK IV LOCATING FAULTS

9
Check of pump sensor signal, ABS pin 31 and 49
1. Check the pump relay fuse.
2. Disconnect the ABS adapter from the wiring harness. Connect the
Autodiagnos Break-out Box (A0201/A0202) and the 55-pin adapter (A020209)
to the car’s wiring harness only. Do not reconnect the control unit.
3. Measure the resistance between ABS pin 31 and 49 (the pump sensor).
The correct reading is between 10–40 Ω. Incorrect reading: Measure the
resistance in the pumpsensor at the hydraulic unit. The correct reading
is between 10–40 Ω.
Incorrect reading: Replace the hydraulic unit.
Correct reading: Check the wiring between the pump sensor and the 55-
pole harness.
4. Turn on ignition and short ciruit ABS pin 1, 15 and 34. The pump
should start. Turn off ignition and disconnect the short circuits.
If the pump started: The pumpsensor signal is incorrect. Check once
more the wiring between the pump sensor and the harness. If the
wiring is correct: Replace the hydraulic unit.
If the pump did not start: Turn on ignition and short circuit ABS pin
1 and 34. Measure the voltage at ABS pin 15. The correct reading is
more than 11 V approx.
Incorrect reading: Check the wiring between the relay and the 55-pole
harness. Also check the wiring between the relay and the fuse holder.

5. Replace the relay and repeat the test with Multi-Tester plus/pro.

10
Check of ABS-light and TRACS-light and their wiring
If Multi-Tester plus/pro indicates that that the lights are on they should
be on.
1. Check the buld and the wiring.

40 A 01090224-1
 TROUBLE-SHOOTING
INDEX ABS TEVES MK IV

Index
ABS-light ............................................................................................ 32, 40
Battery ................................................................................................ 31, 35
Brake light switch ............................................................................... 31, 37
Diagnosis ................................................................................................... 29
Front left wheel sensor .............................................................................. 30
Front right wheel sensor ............................................................................ 30
Ground ........................................................................................ 27, 28, 36
Ignition switch ..................................................................................... 33, 35
Main relay ........................................................................................... 27, 36
Pedal position sensor ................................................................................ 28
Pedal sensor ............................................................................................. 39
Pressure switch ......................................................................................... 27
Pump relay control .................................................................................... 28
Pump sensor signal ................................................................................... 31
Rear left wheel sensor ............................................................................... 30
Rear right wheel sensor ............................................................................. 29
Switch for TRACS ..................................................................................... 29
TRACS-light ....................................................................................... 32, 40
Valve front left ........................................................................................... 33
Valve inlet front left ................................................................................... 29
Valve inlet front right ................................................................................. 32
Valve inlet rear .......................................................................................... 33
Valve inlet right rear .................................................................................. 33
Valve outlet front left ................................................................................. 27
Valve outlet front right ........................................................................ 28, 29
Valve outlet rear ........................................................................................ 31
Valve outlet rear right ................................................................................ 28
Valve rear left ..................................................................................... 31, 33
Valve rear right .......................................................................................... 31
Valve right front ......................................................................................... 33
Valve TRACS ............................................................................................ 32
Wheel sensor ............................................................................................ 38

A 01090224-1 41
TROUBLE-SHOOTING
ABS TEVES MK IV INTERFACE - SIGNAL LOCATIONS

Interface - Signal Locations

Note: Interface viewed from below Wiring

1. Ground
2. Valve outlet front left
3. Control of and power su pply from main relay
13. Pressure switch for TRACS
15. Pump relay control 19
16. Pedal position sensor
55 37
18
18. Valve outlet rear right or front right 54 36
19. Ground 17
20. Valve inlet front left
53 35
16
21. Valve outlet front right 52 34
23. Diagnosis 15
51 33
25. Switch for TRACS 14
26. Pressure switch TRACS 50 32
27. Wheel sensor rear right 13
49 31
28. Wheel sensor rear left 12
29. Wheel sensor front right 48 30
30. Wheel sensor front left 11
47 29
31. Pump sensor signal 10
32. Brake light switch 46 28
33. Feed from main relay 9
45 27
34. Main relay control signal 8
35. Battery voltage 44 26
36. Valve outlet rear, rear left or front left 7
43 25
37. Valve TRACS 6
38. Valve inlet front right 42 24
44. TRACS-light 5
41 23
45. Wheel sensor rear right 4
46. Wheel sensor rear left 40 22
47. Wheel sensor front right 3
39 21
48. Wheel sensor front left 2
49. Pump sensor 38 20
52. ABS-light 1
53. Power from ignition switch (terminal 15)
54. Valve inlet rear, rear left or front left
55. Valve inlet rear right or front right

Shaded areas indicate signals that can vary depending on car model.

42 A 01090224-1
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WIRING DIAGRAM ABS TEVES MK IV

Wiring Diagram
Note: This is an example of a wiring diagram for a Teves MK IV. Check in
the relevant workshop manual for the wiring diagram of the car you are
working on.

Battery

Control unit Teves MK IV

35
Outlet valve Ignition switch
front levt 2 ABS-light
52
ABS
Outlet valve
front right
21 53
Main relay
Outlet valve 34
36
rear left
3
Outlet valve 18
rear right 33 Pump relay
Fuses
Inlet valve 15
front left
20

Inlet valve 38
front right Pump
Inlet valve
31
54 M
rear left 49
Inlet valve 55 Brake light switch
rear right
32
30
Sensor FL Pedal sensor
48
29 16
Sensor FR 47
28 41
Sensor RL 46
Diagnosis
Sensor RR
27
45 23
1 42
19

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TROUBLE-SHOOTING
ABS TEVES MK IV HYDRAULIC DIAGRAM

Hydraulic Diagram
Note: This is an example of a hydraulic diagram for a Teves MK IV.
Check in the relevant workshop manual for the hydraulic diagram of the
car you are working on.

Brake fluid reservoir

Main brake cylinder

M Hydraulic pump

IFL IRL IFR IRR

OFL ORL OFR ORR

Wheel cylinder Wheel cylinder

front left front right

Wheel cylinder Wheel cylinder

rear left rear right

IFL-inlet valve front left OFL-outlet valve front left

IFR-inlet valve front right OFR-outlet valve front right
IRL-inlet valve rear left ORL-outlet valve rear left
IRR-inlet valve rear right ORR-outlet valve rear right
(IR-inlet valve rear) (OR-outlet valve rear)

44 A 01090224-1