Skoda Workshop Service and Repair Manuals

Test table Notes for the test table t  The denominations of the bushes of the adapter -V.A.G 1598/36- are identical to the contact denominations of the ABS control unit -J104- in the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations t  If the measured values deviate from the nominal values, perform the fault eliminating measures listed in the right part of the table → Current flow diagrams, Electrical fault finding and Fitting locations t  Electrical continuity tests with the measuring tool set -V.A.G 1594 A- (bridge structure). t  If the measured values only differ slightly from the specified values, clean the bushes and plugs of the test devices and measuring cables (with contact spray -G 000 700 04-) and repeat test. Before replacing the relevant components test the cables and connections more specifically for nominal values below 10 Ω, repeat the resistance measurement on the component.

Switch on measuring range: voltage measurement (20 V =)
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
1	1 +47	Voltage supply for the hydraulic pump -V64- (terminal 30) to the control unit -J104-	l  Ignition off	10,0 - 14,5V	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
2	32 + 16	Voltage supply of the valves in the hydraulic unit -N55- (terminal 30) to the control unit -J104-	l  Ignition off	10,0 - 14,5V	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
3	4 + 47	Voltage supply (terminal 15) of the control unit -J104-	l  Ignition on	10,0 - 14,5V	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
4	47 + 41	Function of the brake light switch -F-	l  Ignition off l  Brake pedal not actuated	0.0 - 0.5 V	–  Test brake light switch -F- and read measured value block → Chapter; display group number 003. –  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
			–  Brake pedal actuated	approx. battery voltage	–  Check brake light switch -F- → Chapter.

Switch on measuring range: resistance measurement (2 kΩ)
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
5	33 + 34	Resistance of the front right speed sensor -G45-	l  Ignition off	1.0...1.3 kΩ	–  Check wiring according to current flow diagram. –  Throughout the test, do not move cables → Current flow diagrams, Electrical fault finding and Fitting locations If the lines are not found to be faulty: –  Replace speed sensor -G45- → Chapter.
6	45 + 46	Resistance of the front left speed sensor -G47-	t  Ignition off	1.0...1.3 kΩ	–  Check wiring according to current flow diagram. –  Throughout the test, do not move cables → Current flow diagrams, Electrical fault finding and Fitting locations If the lines are not found to be faulty: –  Replace speed sensor -G47- → Chapter.
7	42 + 43	Resistance of the rear right speed sensor -G44-	t  Ignition off	1.0...1.3 kΩ	–  Check wiring according to current flow diagram. –  Throughout the test, do not move cables → Current flow diagrams, Electrical fault finding and Fitting locations If the lines are not found to be faulty: –  Replace speed sensor -G44- → Chapter.
8	37 + 36	Resistance of the rear left speed sensor -G46-	t  Ignition off	1.0...1.3 kΩ	–  Check wiring according to current flow diagram. –  Throughout the test, do not move cables → Current flow diagrams, Electrical fault finding and Fitting locations If the lines are not found to be faulty: –  Replace speed sensor -G46- → Chapter.
9	33 + 34	Voltage signal of the front right speed sensor -G45-	l  Vehicle raised l  Ignition off		–  Check the installation of the wheel speed sensor -G45- and the rotor.
			–  Turn front right wheel by approx. 1 turn per sec.	Alternating voltage min. 65 mV	–  Check wheel speed sensor -G45- to ensure it is correctly connected and read measured value block → Chapter, display group number 001.
10	45 + 46	Voltage signal of the front left speed sensor -G47-	l  Vehicle raised l  Ignition off		–  Check the installation of the wheel speed sensor -G47- and the rotor.
			–  Turn rear left wheel by approx. 1 turn per sec.	Alternating voltage min. 190mV	–  Check wheel speed sensor -G47- to ensure it is correctly connected and read measured value block → Chapter, display group number 001
11	42 + 43	Voltage signal of the rear right speed sensor -G44-	l  Vehicle raised l  Ignition off		–  Check the installation of the wheel speed sensor -G44- and the rotor.
			–  Turn rear right wheel by approx. 1 turn per sec.	Alternating voltage min. 190mV	–  Check wheel speed sensor -G44- to ensure it is correctly connected and read measured value block → Chapter, display group number 001.
12	37 + 36	Voltage signal of the rear left speed sensor -G46-	l  Vehicle raised l  Ignition off		–  Check the installation of the wheel speed sensor -G46- and the rotor.
			–  Turn rear left wheel by approx. 1 turn per sec.	Alternating voltage min. 190mV	–  Check wheel speed sensor -G46- to ensure it is correctly connected and read measured value block → Chapter, display group number 001.

Functional test: ABS warning light -K47-
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
13	-	Function of the ABS warning light -K47-	l  Ignition off –  Switch on ignition	The warning light -K47- lights up for approx. 2 seconds and goes out	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations –  Fault in the dash panel insert. → Electrical System; Rep. gr.90

Functional test: Hand brake/brake fluid level warning light -K14/33-
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
14	-	Function of the hand brake/brake fluid level warning light -K14/33-	l  Handbrake not applied l  Brake fluid level is O.K. l  Ignition on	Warning light -K14/33-	–  Fault in the dash panel insert → Electrical System; Rep. gr.90
			–  Apply handbrake	Warning light -K14/33- lights up	–  Fault in the dash panel insert → Electrical System; Rep. gr.90

Functional test: Function of the TCS button -E132-
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
15	-	Function of the TCS button -E132-	l  Ignition on	The warning light -K86- lights up for approx. 2 seconds and goes out
			–  TCS button -E132- operated	TCS warning light -K86- lights up	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
			–  Operate TCS button -E132- once again	TCS warning light -K86- goes out	–  Replace TCS button -E132- → Body Work; Rep. gr.70

Switch on measuring range: resistance measurement (200 Ω/20 MΩ)
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
16	11 or 15	Data BUS cables	l  Ignition off l  Measuring range 200 Ω set –  Disconnect the multi-pin plug connections from the control units connected to a data BUS line: –  Connect -V.A.G 1598 A- with adapter -V.A.G 1598/36-
			–  Check the data BUS cable for open circuit	max. 1.5 Ω	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations
			–  Set measuring range 20 MΩ –  Take out the fuse S9
			–  Check cables for short-circuit to positive or to earth	∞Ω	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations

Switch on measuring range: voltage measurement (20 V =)
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
17	-	Voltage supply for -V.A.G 1552-, plug connection -T16a-1)	l  Ignition off
			–  Connect the handheld multimeter -V.A.G 1526- with the measuring tool set -V.A.G 1594- to the plug connection -T16a-1)	10,0 - 14,5V	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations

1) Contact assignment of the diagnostic connector → Chapter.

Switch on measuring range: resistance measurement (200 Ω)
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
18	-	Resistance of the K cable for -V.A.G 1552-, plug connection -T16a-1)	l  Ignition off –  Disconnect the multi-pin plug connection from the control unit -J104- –  Connect -V.A.G 1598 A- with adapter -V.A.G 1598/36-
			–  Connect the handheld multimeter -V.A.G 1526- with the measuring tool set -V.A.G 1594- to the contacts -T16a/7-1) and -T47a/2-2) of the multi-pin plug connections from the control unit -J104-.	max. 1.5 Ω	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations

1) Contact assignment of the diagnostic connector → Chapter.

2) Contact assignment of the control unit plug → Chapter.

Switch on measuring range: resistance measurement (200 Ω)
Test step	-V.A.G 1598 A- bushes	Test covers	l  Test conditions –  additional works	Specified value	Measures for deviations from nominal value
19	14 + 38	Jumper for ABS/EDL/TCS	t  Ignition off	0.0 - 1.0 Ω	–  Test wiring according to the current flow diagram → Current flow diagrams, Electrical fault finding and Fitting locations