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HOMESERVICE MANUALSVOLKSWAGEN2002GOLF GLS, 1.9 P, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLBRAKE SYSTEM - OBD (A4 PLATFORM)01 ON BOARD DIAGNOSTIC (OBD)ABS, ABS/EDL AND ABS/EDL/ASR ITT MARK 20 IE, ELECTRICAL CHECKTEST TABLE
2002 Volkswagen Golf GLS, 1.9 P, Automatic

Test table

2002 Volkswagen Golf GLS, 1.9 P, AutomaticSECTION Test table

Notes on test table 

  • The socket designations of adapter V.A.G 1598/21 are identical to the control module -J104 contact designations in wiring diagram.

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

  • If the readings obtained deviate from the specifications, carry out repair measure in the right-hand part of the table.

Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

  • Continuity checks with adapter set V.A.G 1594 A (bridging).
  • If the measured figures only deviate slightly from the specifications, clean sockets and connectors of the testers and adapter cables (with contact spray G 000 700 04 ) and repeat check. Before replacing components, check wiring and connections and also, particularly for specifications of less than 10 Ω , repeat resistance check on the component.
Switch to measuring range: 
Voltage measurement (20 V =) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
1 8 + 25 Voltage supply for ABS hydraulic pump -V64- to ABS Control Module (w/EDL) -J104-
  • Ignition switched off
 10.0 to 14.5 V
  • Check wire using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
2 9 + 24 Voltage supply for the valves in ABS hydraulic unit -N55- to ABS Control Module (w/EDL) -J104-
  • Ignition switched off
 10.0 to 14.5 V
  • Check wire using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
Switch to measuring range: 
Voltage measurement (20 V =) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
3 8 + 4 Voltage supply (terminal X) to ABS Control Module (w/EDL) -J104-
  • Ignition switched on
 10.0 to 14.5 V
  • Check wire using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
4 8 + 18 Function of brake light switch -F-
  • Ignition switched off
  • Brake pedal not depressed
 0.0 to 0.5 V
  • Check brake light switch -F- and Read measured value block, display group 003
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
     
  • Press brake pedal
 approx. battery voltage
Switch to measuring range: 
Resistance measurement (2 k Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
5 19 + 20 Resistance of right front ABS wheel speed sensor -G45-
  • Ignition switched off
 1.0 to 1.3 k Ω
  • Separate connector on right front ABS wheel speed sensor -G45-
  • Check wiring using wiring diagram
  • Wiggle wiring during test. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

    If no malfunction can be located in the wiring:

    • Replace right front ABS wheel speed sensor -G45-. Refer to 45 ANTI-LOCK BRAKE SYSTEM ; Removing and installing parts of ABS system on front and rear axles
Switch to measuring range: 
Resistance measurement (2 k Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
6 1 + 2 Resistance of left front ABS wheel speed sensor -G47-
  • Ignition switched off
 1.0 to 1.3 k Ω
  • Separate connector on left front ABS wheel speed sensor -G47-
  • Check wiring using wiring diagram
  • Wiggle wiring during test. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

    If no malfunction can be located in the wiring:

    • Replace left front ABS wheel speed sensor -G47-. Refer to 45 ANTI-LOCK BRAKE SYSTEM ; Removing and installing parts of ABS system on front and rear axles
Switch to measuring range: 
Resistance measurement (2 k Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
7 22 + 23 Resistance of right rear ABS wheel speed sensor -G44-
  • Ignition switched off
 1.0 to 1.3 k Ω
  • Separate connector on right rear ABS wheel speed sensor -G44
  • Check wiring using wiring diagram
  • Wiggle wiring during test. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

    If no malfunction can be located in the wiring:

    • Replace right rear ABS wheel speed sensor -G44-. Refer to 45 ANTI-LOCK BRAKE SYSTEM ; Removing and installing parts of ABS system on front and rear axles
Switch to measuring range: 
Resistance measurement (2 k Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
8 5 + 6 Resistance of left rear ABS wheel speed sensor -G46-
  • Ignition switched off
 1.0 to 1.3 k Ω
  • Separate connector on left rear ABS wheel speed sensor -G46-
  • Check wiring using wiring diagram
  • Wiggle wiring during test. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

    If no malfunction can be located in the wiring:

    • Replace left rear ABS wheel speed sensor -G46-. Refer to 45 ANTI-LOCK BRAKE SYSTEM ; Removing and installing parts of ABS system on front and rear axles
Switch to measuring range: 
Voltage measurement (2 V ≈ ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
9 19 + 20 Right front ABS wheel speed sensor -G45- voltage signal
  • Vehicle raised
  
  • Check installation of right front ABS wheel speed sensor -G45- and rotor.
     
  • Ignition switched off
    
     
  • Rotate front right wheel at approx. 1 rev./sec.
 min. 65 mV alternating voltage
  • Check whether right front ABS wheel speed sensor -G45- has been interchanged and Read measured value block. Refer to Measured value block, reading  , display group number 001
10 1 + 2 Left front ABS wheel speed sensor -G47- voltage signal
  • Vehicle raised
  
  • Check installation of left front ABS wheel speed sensor -G47- and rotor.
     
  • Ignition switched off
    
     
  • Rotate front left wheel at approx. 1 rev./sec.
 min. 65 mV alternating voltage
  • Check whether left front ABS wheel speed sensor -G47- has been interchanged and Read measured value block. Refer to Measured value block, reading  , display group number 001
Switch to measuring range: 
Voltage measurement (2 V ≈ ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
11 22 + 23 Right rear ABS wheel speed sensor -G44- voltage signal
  • Vehicle raised
  
  • Check installation of right rear ABS wheel speed sensor -G44- and rotor.
     
  • Ignition switched off
    
     
  • Rotate rear right wheel at approx. 1 rev./sec.
 min. 190 mV alternating voltage
  • Check whether right rear ABS wheel speed sensor -G44- has been interchanged and Read measured value block. Refer to Measured value block, reading  , display group number 001
12 6 + 5 Left rear ABS wheel speed sensor -G46- voltage signal
  • Vehicle raised
  
  • Check installation of left rear ABS wheel speed sensor -G46- and rotor.
     
  • Ignition switched off
    
     
  • Rotate rear left wheel at approx. 1 rev./sec.
 min. 190 mV alternating voltage
  • Check whether left rear ABS wheel speed sensor -G46- has been interchanged and Read measured value block. Refer to Measured value block, reading  , display group number 001
Switch to measuring range: 
Resistance measurement (200 Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
13 3 + 14
 		 Coding bridge
  • Ignition switched off
 0.0 to 1.0 Ω  
         
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
Switch to measuring range: 
Voltage measurement (20 V =) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
14 - Supply voltage for V.A.G 1551, connector T161)
  • Ignition switched off
  • Connect multimeter V.A.G 1526 using adapter set V.A.G 1594 to connector T161)
 10.0 to 14.5 V  
         
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder

1) Diagnostic connection contact assignment. Refer to Contact assignment of connectors for voltage supply and On Board Diagnostic (OBD) with V.A.G 1551 Scan Tool  .

Switch to measuring range: 
Resistance measurement 200 Ω 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
15 - Resistance of K wire for V.A.G 1551 connector T161)
  • Ignition switched off
  • Disconnect multi-pin connector from ABS control module (w/EDL) -J104-
 max. 1.5 Ω
  • Check wiring using wiring diagram
          . Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
     
  • Connect test box V.A.G 1598/21
    
     
  • Connect multimeter V.A.G 1526 to contacts T16/71) and T25/7 of multi-pin connectors from ABS control module (w/EDL) -J104- using adapter set V.A.G 1594
    

1) Diagnostic connection contact assignment. Refer to Contact assignment of connectors for voltage supply and On Board Diagnostic (OBD) with V.A.G 1551 Scan Tool  .

Functional check: ABS warning light -K47- 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
16 - Function of ABS warning light -K47-
  • Switch ignition on
 ABS warning light -K47- lights up for approx. 2 seconds and goes out again  
         
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
Functional check: Warning light for brake system -K118- 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
17 - Function of warning light for brake system -K118-
  • Brake fluid level is OK.
  • Switch ignition on
 Warning light for brake system -K118- lights up for approx. 2 seconds and goes out again
  • Check brake fluid level warning switch -F34- in sealing cap. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
     
  • Pull connectors off both front speed sensors
  • Start engine and run at more than 2000 rpm
 Warning light -K118- lights up and 3 warnings are sounded
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
     
  • Reconnect connectors to both front speed sensors again
  • Check DTC memory and erase
    
Functional check: ABS hydraulic pump -V64- 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
18 - Function of ABS hydraulic pump -V64-
  • Ignition switched off
  • Pull hydraulic pump -V64- connector T2 off control module
    
     
  • Connect Ground to connector T2/1 and battery voltage to connector T2/2 on hydraulic pump
 Hydraulic pump runs without malfunction (max. 10 secs.)
        Hydraulic pump does not run
Switch to measuring range: 
Resistance measurement (200 Ω /20 M Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
19 11 +10 Data bus wiring
  • Ignition switched off
  • Set to measuring range 200 Ω
    
     
  • Disconnect multi-pin connection from a control module which is connected via data bus wiring:
    
     
  • Connect test box V.A.G 1598/21
    
     
  • Check data bus wiring for open circuit
 max. 1.5 Ω
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
     
  • Set to measuring range 20 M Ω
    
     
  • Remove fuse S9
    
     
  • Check wiring for short circuit to positive or earth
 ∞ Ω  
         
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
Switch to measuring range: 
Resistance measurement (200 Ω /20 M Ω ) 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
20 - Longitudinal acceleration sensor -G251- wiring
  • Ignition switched off
  • Select 200 Ω measuring range
  • Disconnect connector for longitudinal acceleration sensor -G251-
  • Disconnect multi-pin connector T25 from ABS control module (w/EDL) -J104-
  • Connect test box V.A.G 1598/21
    
     
  • Check wiring between multi-pin connector for longitudinal acceleration sensor -G251- and multi-pin connector for ABS control module (w/EDL) -J104- for open circuit
 max. 1.5 Ω
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
     
  • Set to measuring range 20 M Ω
    
     
  • Remove fuse S9
    
     
  • Check wiring for short circuit to positive or Ground
 ∞ Ω  
         
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
Functional check: ESP Control lamp -K155 
Test step  V.A.G 1598 sockets  Item tested 
  • Test conditions
  • Additional operations
 Specification  Measures for deviations from specification 
21 - Function of ESP Control lamp -K155-
  • Switch ignition on
 ESP Control lamp -K155- lights up for 2 seconds and goes out again  
         
  • Check wiring using wiring diagram. Refer to Electrical Wiring Diagrams, Troubleshooting & Component Locations binder
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.