Test Box VAG 1598/20, Connecting for Wiring Test

-- Switch ignition off.

-- Remove ABS Control Module (w/EDL) -J104- ANTILOCK BRAKE SYSTEM COMPONENTS, BOSCH 5 .

-- Disconnect harness connector from ABS Control Module (w/EDL) -J104-.

-- Connect test box : VAG1598/20 to ABS control module harness connector (vehicle wiring harness).

Switch to voltage measuring range 200 Ω

Test step

: VAG1598/20 sockets

Test of

Test conditions

-- Additional operations

Specified value

Repairing malfunction

5 + 33

Left front ABS inlet valve -N101-
Left front ABS outlet valve -N102-

Wiring between ABS control module and ABS hydraulic unit OK

9 Ω - 22 Ω

-- Check wiring between ABS control module and ABS hydraulic unit for short circuit to Ground (GND) or positive -- If the wiring harness is OK, replace the ABS hydraulic unit

54 + 26

Right front ABS inlet valve -N99-
Right front ABS outlet valve -N100-

53 + 25

Left rear ABS inlet valve -N134-
Left rear ABS outlet valve -N136-

6 + 34

Right rear ABS inlet valve -N133-
Right rear ABS outlet valve -N135-

5 ⁽¹⁾

3 + 55

Left front traction control switch-over valve -N168-
Right front traction control switch-over valve -N166-

Wiring between ABS control module and ABS hydraulic unit OK

12 Ω - 28 Ω

⁽¹⁾	Only for vehicles with ABS /EDL or ASR system.

Switch to voltage measuring range 200 Ω

Test step

: VAG1598/20 sockets

Test of

Test conditions

-- Additional operations

Specified value

Repairing malfunction

6 ⁽¹⁾

4 + 27

Left front traction control outlet valve -N169-
Right front traction control outlet valve -N167-

Wiring between ABS control module and ABS hydraulic unit OK

12 Ω - 28 Ω

-- Test electric wiring between ABS control module and ABS hydraulic unit for short circuit to Ground (GND) or positive => Wiring Diagram -- If the wiring harness is OK, replace the ABS hydraulic unit

⁽¹⁾	Only for vehicles with ABS /EDL or ASR system.

Switch to voltage measuring range (2 Ω and 20 Ω)

Test step

: VAG1598/20 sockets

Test of

Test conditions

-- Additional operations

Specified value

Repairing malfunction

9 + 10 ⁽¹⁾ 9 + 10 ⁽³⁾ 36 + 10 ⁽²⁾

Left front ABS wheel speed sensor -G47-

Wiring between ABS control module and ABS hydraulic unit OK

400 Ω - 2300 Ω

15 + 14 42 + 14 ⁽³⁾

Right front ABS wheel speed sensor -G45-

13 + 12

Left rear ABS wheel speed sensor -G46-

11 + 38

Right rear ABS wheel speed sensor -G44-

Note: Different outputs at the ABS Control Module (w/EDL) -J104- are assigned depending on the system installed.

⁽¹⁾	Only for front-wheel-drive with Bosch 5 ABS /EDL

⁽²⁾	Only for front-wheel-drive with Bosch 5 ABS

⁽³⁾	Only for front-wheel-drive with Bosch 5 ABS /EDL/ASR

Switch to voltage measuring range 200 Ω
Test step	VAG 1598/20sockets	Test of	Test conditions -- Additional operations	Specified value	Repairing malfunction
11	2 + 37	ABS solenoid valve relay -J106-	Wiring between ABS control module and ABS hydraulic unit OK	30 Ω - 80 Ω	-- Test electric wiring between ABS control module and ABS hydraulic unit for short circuit to Ground (GND) or positive => Wiring Diagram -- If the wiring harness is OK, replace the relay

Switch to voltage measuring range 200 Ω
Test step	VAG 1598/20sockets	Test of	Test conditions -- Additional operations	Specified value	Repairing malfunction
12	2 + 7	ABS return flow pump relay -J105-	Wiring between ABS control module and ABS hydraulic unit OK	30 Ω - 80 Ω	-- Test electric wiring between ABS control module and ABS hydraulic unit for short circuit to Ground (GND) or positive => Wiring Diagram -- If the wiring harness is OK, replace relay

Test of operation and correct connections

Test step

VAG 1598/20sockets

Test of

Test conditions

-- Additional operations

Specification

Repairing malfunction

13 ⁽¹⁾

Bridge 1 + 2, 28 + 37

Left front ABS inlet valve -N101- and brake line connection

Ignition on

-- Bridge sockets 5 + 28

-- Depress brake pedal and hold

Left front wheel can be turned by hand

-- If wheel locks, check whether another wheel can be turned. If yes, the hydraulic brake lines are improperly connected. Check the brake line connections and unions. Make sure that the system operates properly. Repeat test step 13-- If all wheels lock, there is a malfunction of the inlet valve Diagnostic Trouble Code (DTC) table, DTC TABLE , DTC 00257

-- Remove bridge

Left front wheel locks

-- Release brake pedal

⁽¹⁾	A second technician is required to conduct this test.

Test of operation and correct connections

Test step

VAG 1598/20sockets

Test of

Test conditions

-- Additional operations

Specification

Repairing malfunction

14 ⁽¹⁾

Bridge 1 + 2, 28 + 37

Right front ABS inlet valve -N100- and brake line connection

Ignition on

-- Bridge sockets 54 + 28

-- Depress brake pedal and hold

Right front wheel can be turned by hand

-- If wheel locks, check whether another wheel can be turned. If yes, the hydraulic brake lines are improperly connected. Check the brake line connections and unions. Make sure that the system operates properly. Repeat test step 14-- If all wheels lock, there is a malfunction of the inlet valve Diagnostic Trouble Code (DTC) table, DTC TABLE , DTC 00259

-- Remove bridge

Right front wheel locks

-- Release brake pedal

⁽¹⁾	A second technician is required to conduct this test.

Test of operation and correct connections

Test step

VAG 1598/20sockets

Test of

Test conditions

-- Additional operations

Specification

Repairing malfunction

15 ⁽¹⁾

Bridge 1 + 2, 28 + 37

Left rear ABS inlet valve -N134- and brake line connection

Ignition on

-- Bridge sockets 53 + 28

-- Depress brake pedal and hold

Left rear wheel can be turned by hand

-- If wheel locks, check whether another wheel can be turned. If yes, the hydraulic brake lines are improperly connected. Check the brake line connections and unions. Make sure that the system operates properly. Repeat test step 15-- If all wheels lock, there is a malfunction of the inlet valve Diagnostic Trouble Code (DTC) table, DTC TABLE , DTC 00274

-- Remove bridge

Left rear wheel locks

-- Release brake pedal

⁽¹⁾	A second technician is required to conduct this test.

Test of operation and correct connections

Test step

VAG 1598/20sockets

Test of

Test conditions

-- Additional operations

Specification

Repairing malfunction

16 ⁽¹⁾

Bridge 1 + 2, 28 + 37

Right rear ABS inlet valve -N133- and brake line connection

Ignition on

-- Bridge sockets 6 + 28

-- Depress brake pedal and hold

Right rear wheel can be turned by hand

-- If wheel locks, check whether another wheel can be turned. If yes, the hydraulic brake lines are improperly connected. Check the brake line connections and unions. Make sure that the system operates properly. Repeat test step 16-- If all wheels lock, there is a malfunction of the inlet valve Diagnostic Trouble Code (DTC) table, DTC TABLE , DTC 00273

-- Remove bridge

Right rear wheel locks

-- Release brake pedal

⁽¹⁾	A second technician is required to conduct this test.

Switch to voltage measuring range 200 Ω

Test step

VAG 1598/20sockets

Test of

Test conditions

-- Additional operations

Specification

Repairing malfunction

17 ⁽¹⁾

Bridge 1 + 2, 7 + 37, 37 + 28

ABS return flow pump -V39-
Left front traction control switch-over valve -N168-
Left front traction control outlet valve -N169-
Pressure limiting valve in ABS hydraulic unit -N55-
Left front ABS outlet valve -N102-
Right rear ABS outlet valve -N135-

-- Connect pressure gauge : VAG1310A to left front brake caliper and bleed BRAKE FLUID, BLEEDING AND CHARGING .-- Bridge sockets 3 + 28

-- Return flow pump faulty, replace ABS hydraulic unit -N55- ANTILOCK BRAKE SYSTEM HYDRAULIC UNIT OVERVIEW -- Test switch-over valve -N168- and outlet valve -N169- with resistance measurement test steps 5 and 6. If faulty, replace ABS hydraulic unit -N55- -- Pressure limiting valve and/or left front ABS outlet valve -N102- and/or right rear outlet valve -N135- faulty, replace ABS hydraulic unit -N55- -

-- Switch ignition on, then after not more than 10 seconds switch ignition off

Switch-over valve -N168- operates
ABS return flow pump -V39- runs
Gauge pressure max. 5 bar

-- Bridge sockets 4 + 28-- Switch ignition on, then after not more than 10 seconds switch ignition off

Outlet valve -N169- operates
Gauge pressure increases: FWD: 170 ± 25 bar AWD: 90 ± 25 bar

-- Disconnect pressure gauge : VAG1310A and bleed brakes BRAKE FLUID, BLEEDING AND CHARGING .

⁽¹⁾	Only for vehicles with ABS /EDL or ASR system.

Switch to voltage measuring range 200 Ω

Test step

VAG 1598/20sockets

Test of

Test conditions

-- Additional operations

Specification

Repairing malfunction

18 ⁽¹⁾

Bridge 1 + 2, 7 + 37, 37 + 28

ABS return flow pump -V39-
Right front traction control switchover valve -N166-
Right front traction control outlet valve -N167-
Pressure limiting valve in ABS hydraulic unit -N55-
Right front ABS outlet valve -N100-
Left rear ABS outlet valve -N136- -

-- Connect pressure gauge : VAG1310A to right front brake caliper and bleed BRAKE FLUID, BLEEDING AND CHARGING .-- Bridge sockets 55 + 28

-- Return flow pump faulty, replace ABS hydraulic unit -N55- ANTILOCK BRAKE SYSTEM HYDRAULIC UNIT COMPONENT OVERVIEW -- Test switch-over valve -N166- and outlet valve -N167- with resistance measurement test steps 5 and 6. If faulty, replace ABS hydraulic unit -N55- -- Pressure limiting valve and/or right front ABS outlet valve -N100- and/or left rear outlet valve -N136- faulty, replace ABS hydraulic unit -N55-

-- Switch ignition on, then after not more than 10 seconds switch ignition off

Switch-over valve -N166- operates
ABS return flow pump -V39- runs
Gauge pressure max. 5 bar

-- Bridge sockets 27 + 28-- Switch ignition on, then after not more than 10 seconds switch ignition off

Outlet valve -N167- operates
Gauge pressure increases: FWD: 170 ± 25 bar AWD: 90 ± 25 bar

-- Disconnect pressure gauge : VAG1310A and bleed brakes BRAKE FLUID, BLEEDING AND CHARGING .

⁽¹⁾	Only for vehicles with ABS /EDL or ASR system.