Audi Workshop Service and Repair Manuals

Test table

Overview of test steps

Item tested	Test step
Power supply, terminal 30 for ABS hydraulic pump -V64-	–  Perform test step 1 → Anchor
Power supply, terminal 30 for valves	–  Perform test step 2 → Anchor
Power supply, terminal 75a for ABS with EDL control unit -J104-	–  Perform test step 3 → Anchor
Brake light switch -F-	–  Perform test step 4 → Anchor
Resistance of speed sensor, front right -G45-	–  Perform test step 5 → Anchor
Resistance of speed sensor, front left -G47-	–  Perform test step 6 → Anchor
Resistance of speed sensor, rear right -G44-	–  Perform test step 7 → Anchor
Resistance of speed sensor, rear left -G46-	–  Perform test step 8 → Anchor
Voltage signal of speed sensor, front right -G45-	–  Perform test step 9 → Anchor
Voltage signal of speed sensor, front left -G47-	–  Perform test step 10 → Anchor
Voltage signal of speed sensor, rear right -G44-	–  Perform test step 11 → Anchor
Voltage signal of speed sensor, rear left -G46-	–  Perform test step 12 → Anchor
Coding bridges	–  Perform test step 13 → Anchor
ABS hydraulic pump -V64-	–  Perform test step 14 → Anchor
ABS warning lamp -K47-	–  Perform test step 15 → Anchor
“Brake warning” symbol in instrument cluster or display of driver information system	–  Perform test step 16 → Anchor
Traction control system warning lamp -K86-	–  Perform test step 17 → Anchor
Traction control system switch -E132-	–  Perform test step 18 → Anchor
Wiring for steering angle sender -G85-	–  Perform test step 19 → Anchor
Wiring for lateral acceleration sender -G200-	–  Perform test step 20 → Anchor
Wiring for yaw rate sender -G202-	–  Perform test step 21 → Anchor
Wiring for brake pressure sender 1 -G201-	–  Perform test step 22 → Anchor
Wiring for brake pressure sender 2 -G214-	–  Perform test step 23 → Anchor
Wiring for brake detection switch, ESP -F83-	–  Perform test step 24 → Anchor
Wiring for longitudinal acceleration sender -G251-	–  Perform test step 25 → Anchor
Brake light suppression relay, ESP -J508-	–  Perform test step 26 → Anchor

Test step No. 1

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
15 + 47	Power supply, terminal 30 for pump motor of hydraulic control unit	l  Ignition off
		–  Select measuring range: voltage measurement	Approx. battery voltage	–  Check wiring according to current flow diagram: t  Between contact 15 and earth t  Between contact 47 and terminal 30

Test step No. 2

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
46 + 16	Power supply, terminal 30 for hydraulic control unit valves	l  Ignition off
		–  Select measuring range: voltage measurement	Approx. battery voltage	–  Check wiring according to current flow diagram: t  Between contact 46 and earth t  Between contact 16 and terminal 30

Test step No. 3

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
46 + 44	Power supply, terminal 75a for ABS with EDL control unit -J104-	l  Ignition on
		–  Select measuring range: voltage measurement	Approx. battery voltage	–  Check wiring according to current flow diagram: t  Between contact 46 and earth t  Between contact 44 and terminal 75a

Test step No. 4

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
46 + 23	Brake light switch -F-	l  Ignition off –  Select measuring range: voltage measurement
		–  Brake pedal not operated	0 V	–  Check wiring according to current flow diagram:
		–  Brake pedal operated	Approx. battery voltage	t  Between contact 46 and earth t  Between contact 23 and terminal 30

Test step No. 5

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
3 + 4	Resistance of speed sensor, front right -G45-	l  Ignition off
		–  Select measuring range: resistance measurement	1.0...1.3 kΩ	–  Check connector of speed sensor –  Move wiring to speed sensor when checking (loose contact) –  Renew speed sensor if wiring is OK.

Test step No. 6

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
33 + 34	Resistance of speed sensor, front left -G47-	l  Ignition off
		–  Select measuring range: resistance measurement	1.0...1.3 kΩ	–  Check connector of speed sensor –  Move wiring to speed sensor when checking (loose contact) –  Renew speed sensor if wiring is OK.

Test step No. 7

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
7 + 6	Resistance of speed sensor, rear right -G44-	l  Ignition off
		–  Select measuring range: resistance measurement	1.0...1.3 kΩ	–  Check connector of speed sensor –  Move wiring to speed sensor when checking (loose contact) –  Renew speed sensor if wiring is OK.

Test step No. 8

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
37 + 36	Resistance of speed sensor, rear left -G46-	l  Ignition off
		–  Select measuring range: resistance measurement	1.0...1.3 kΩ	–  Check connector of speed sensor –  Move wiring to speed sensor when checking (loose contact) –  Renew speed sensor if wiring is OK.

Test step No. 9

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
3 + 4	Voltage signal of speed sensor, front right -G45-	l  Vehicle raised l  Ignition off –  Select measuring range: voltage measurement (alternating voltage)
		–  Rotate front right wheel at approx. 1 revolution per second.	Min. 65 mV alternating voltage	–  Check speed sensor for interchanged wiring (read measured value block 001; Display group → Anchor) –  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45

Test step No. 10

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
33 + 34	Voltage signal of speed sensor, front left -G47-	l  Vehicle raised l  Ignition off –  Select measuring range: voltage measurement (alternating voltage)
		–  Rotate front left wheel at approx. 1 revolution per second	Min. 65 mV alternating voltage	–  Check speed sensor for interchanged wiring (read measured value block 001 → Anchor) –  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45

Test step No. 11

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
7 + 6	Voltage signal of speed sensor, rear right -G44-	l  Vehicle raised l  Ignition off –  Select measuring range: voltage measurement (alternating voltage)
		–  Rotate rear right wheel at approx. 1 revolution per second	Min. 190 mV alternating voltage	–  Check speed sensor for interchanged wiring (read measured value block 001 → Anchor) –  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45

Test step No. 12

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
37 + 36	Voltage signal of speed sensor, rear left -G46-	l  Vehicle raised l  Ignition off –  Select measuring range: voltage measurement (alternating voltage)
		–  Rotate rear left wheel at approx. 1 revolution per second	Min. 190 mV alternating voltage	–  Check speed sensor for interchanged wiring (read measured value block 001 → Anchor) –  Check installation of speed sensor and rotor → Brake system; Rep. Gr.45

Test step No. 13

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
18 + 8 → Note	Coding bridge	l  Ignition off
		–  Select measuring range: resistance measurement	0…1 Ω	–  Check wiring and contacts in plug –  Renew coding bridge if test result does not match specification
18 + 38 → Note			0…1 Ω

1)  Vehicles with front-wheel drive. 2)  Vehicles with four-wheel drive.

Test step No. 14

-V.A.G 1598/21- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
–	ABS hydraulic pump -V64-	l  47-pin connector connected to ABS with EDL control unit -J104- l  Ignition on l  Vehicle diagnostic, testing and information system -VAS 5051 A- connected
		–  Initiate final control diagnosis → Chapter and activate ABS hydraulic pump -V64-	Pump motor starts up	–  Switch off ignition –  Check wiring according to current flow diagram: t  Perform test step 1 t  Wiring from contact 1 of 2-pin connector at ABS hydraulic pump -V64- to control unit t  Wiring from contact 2 of 2-pin connector at ABS hydraulic pump -V64- to control unit –  If no fault is found in wiring, remove hydraulic control unit and renew hydraulic pump with valve block → Brake system; Rep. Gr.45

Test step No. 15

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
–	ABS warning lamp -K47-	l  Ignition off l  47-pin connector connected to ABS with EDL control unit -J104-
		–  Switch on ignition	ABS warning lamp -K47- should light up for 2 seconds and then go out	–  Switch off ignition –  Connect test box -V.A.G 1598 A- with -V.A.G 1598/33- –  Check wiring according to current flow diagram: t  Perform test step 3 t  Check wiring between contact 22 of -V.A.G 1598 A- and instrument cluster. –  Interrogate fault memory of instrument cluster (dash panel insert) → Electrical system, self-diagnosis; Rep. Gr.01

Test step No. 16

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
–	“Brake warning” symbol in instrument cluster or display of driver information system	l  Ignition off l  47-pin connector connected to ABS with EDL control unit -J104- l  Electrical connector unplugged from one of the front speed sensors.
		–  Switch on ignition, start engine and increase engine speed to above 2000 rpm. –  Plug in electrical connector after testing is completed and interrogate and erase fault memory	“Brake warning” symbol lights up	–  Check wiring according to current flow diagram t  Perform test step 3 t  Check wiring between contact 22 of -V.A.G 1598 A- and instrument cluster. –  Interrogate fault memory of instrument cluster (dash panel insert) → Electrical system, self-diagnosis; Rep. Gr.01

Test step No. 17

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
–	Traction control system warning lamp -K86-	l  Ignition off 47-pin connector connected to ABS with EDL control unit -J104-
		–  Switch on ignition	Traction control system warning lamp -K86- should light up for 2 seconds and then go out	–  Switch off ignition –  Connect test box -V.A.G 1598 A- with -V.A.G 1598/33- –  Check wiring according to current flow diagram: t  Perform test step 3 t  Check wiring between contact 24 of -V.A.G 1598 A- and instrument cluster. –  Interrogate fault memory of instrument cluster (dash panel insert) → Electrical system, self-diagnosis; Rep. Gr.01

Test step No. 18

Test box -V.A.G 1598 A-, sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
–	Traction control system switch -E132-	l  Ignition off l  47-pin connector connected to ABS with EDL control unit -J104- l  Test step 16 performed
		–  Switch on ignition and operate traction control system switch -E132-	Traction control system warning lamp -K86- lights up
		–  Operate traction control system switch -E132- again	Traction control system warning lamp -K86- goes out	–  Switch off ignition –  Connect test box -V.A.G 1598 A- with -V.A.G 1598/33-
2 + 24		–  Select measuring range: voltage measurement –  Switch on ignition
		–  Do not operate Traction control system switch -E132-	Approx. 0 V	–  Check fuses and wiring according to current flow diagram: t  Between contact 24 of -V.A.G 1598 A- and contact 5 of switch t  Between contact 6 of switch and terminal 75a t  Between contact 2 of switch and earth
		–  Operate traction control system switch -E132-	Approx. battery voltage	–  Renew switch if wiring is OK.

Test step No. 19

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
-	Wiring for steering angle sender -G85-	l  Ignition off l  47-pin connector unplugged from ABS with EDL control unit -J104- l  Electrical connector unplugged from steering angle sender -G85-
		–  Select measuring range: voltage measurement –  Measure between contact 1 and 4 of connector for steering angle sender -G85-	Approx. battery voltage	–  Check wiring according to current flow diagram: t  Between connector contact 4 and terminal 30a t  Between connector contact 1 and earth
		–  Switch on ignition –  Measure between contact 1 and 5 of connector for steering angle sender -G85-	Approx. battery voltage	–  Check wiring according to current flow diagram: t  Between connector contact 5 and terminal 75a t  Between connector contact 1 and earth –  If wiring is OK, connect test box -V.A.G 1598 A- with -V.A.G 1598/33-.
19 + 3 → Note		l  Ignition off Electrical connector unplugged from steering angle sender -G85-
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
20 + 2 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

3)	Contact at connector of steering angle sender -G85-.

Test step No. 20

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
40 + 1 → Note	Wiring for lateral acceleration sender -G200-	l  Ignition off l  Electrical connector unplugged from lateral acceleration sender -G200-
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
9 + 2 → Note			max. 1.5 Ω
25 + 3 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

4)	Contact at connector of lateral acceleration sender -G200-.

Test step No. 21

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
42 + 1 → Note	Wiring for yaw rate sender -G202-	l  Ignition off l  Electrical connector unplugged from yaw rate sender -G202-
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
11 + 2 → Note			max. 1.5 Ω
27 + 3 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

5)	Contact at connector of yaw rate sender -G202-.

Test step No. 22

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
28 + 1 → Note	Wiring for brake pressure sender 1 -G201-	l  Ignition off l  14-pin electrical connector at brake servo unplugged
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
12 + 2 → Note			max. 1.5 Ω
43 + 3 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

6)	Contact of 14-pin connector at brake servo.

Test step No. 23

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
26 + 12 → Note	Wiring for brake pressure sender 2 -G214-	l  Ignition off l  14-pin electrical connector at brake servo unplugged
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
10 + 13 → Note			max. 1.5 Ω
41 + 14 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

7)	Contact of 14-pin connector at brake servo.

Test step No. 24

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
1 + 8 → Note	Wiring for brake detection switch, ESP -F83-	l  Ignition off l  14-pin electrical connector at brake servo unplugged
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
13 + 5 → Note			max. 1.5 Ω
17 + 7 → Note			max. 1.5 Ω
29 + 6 → Note			max. 1.5 Ω
32 + 9 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

8)	Contact of 14-pin connector at brake servo.

Test step No. 25

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
14 + 1 → Note	Wiring for longitudinal acceleration sender -G251-	l  Ignition off l  Electrical connector at longitudinal acceleration sender -G251- unplugged
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
30 + 2 → Note			max. 1.5 Ω
45 + 3 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

9)	Contact at connector of longitudinal acceleration sender -G251-.

Test step No. 26

-V.A.G 1598 A- Sockets	Item tested	Test conditions and additional operations	Specification	Fault rectification if reading does not match specification
-	Voltage supply for brake light suppression relay, ESP -J508-	l  Ignition off l  Brake light suppression relay, ESP -J508- disconnected from 13-position relay carrier behind driver's storage compartment l  Voltage measurement range selected
		–  Measure between contact 6 of relay socket and earth –  Switch on ignition	Approx. battery voltage	–  Read measured value block 003 → Anchor –  Check wiring according to current flow diagram: t  Between contact 6 of relay socket and terminal 75a t  Between contact 2 of relay socket and terminal 30 –  If wiring is OK, connect test box -V.A.G 1598 A- with -V.A.G 1598/33-.
		l  Ignition off l  Brake light suppression relay, ESP -J508- disconnected from 13-position relay carrier behind driver's storage compartment l  Voltage measurement range selected l  Brake pedal not depressed
		–  Measure between contact 2 of relay socket and earth	Approx. 0 V
		–  Brake pedal operated	Approx. battery voltage
23 + 5 → Note	Wiring for brake light suppression relay, ESP -J508-	l  Ignition off l  Brake light suppression relay, ESP -J508- disconnected from 13-position relay carrier behind driver's storage compartment
		–  Select measuring range: resistance measurement	max. 1.5 Ω	–  Repair wiring according to current flow diagram
31 + 4 → Note			max. 1.5 Ω
44 + 6 → Note			max. 1.5 Ω
		–  Check wiring for short to positive or earth.	∞ Ω

10)	Contact in relay socket for brake light suppression relay, ESP -J508-