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Electrical check of ABS/EDL/TCS/ESP ITT Mark 20 IE
Test table (test steps 1 - 16)
Test steps 17 - 28 => see page 01-428
Notes on test table
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◆ The socket designations of adapter V.A.G 1598/33 are identical to the control unit -J104- contact designations in current flow diagram.
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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◆ If the readings obtained deviate from the specifications, carry out fault rectification measure in the right-hand part of the table.
=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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◆ Continuity checks with adapter set V.A.G 1594 A (bridging).
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◆ If the measured figures only deviate slightly from the specifications, clean sockets and plugs 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.
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Switch to measuring range:
Voltage measurement (20 V =)
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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1
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15 + 47
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Voltage supply for hydraulic pump -V64- to control unit -J104
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▪ Ignition switched off
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10.0 - 14.5 V
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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2
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46 + 16
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Voltage supply for the valves in hydraulic unit -N55 to control unit -J104
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▪ Ignition switched off
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10.0 - 14.5 V
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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Switch to measuring range:
Voltage measurement (20 V =)
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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3
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44 + 46
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Voltage supply (terminal X) to control unit -J104
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▪ Ignition switched on
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10.0 - 14.5 V
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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4
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23 + 46
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Function of brake light switch -F
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▪ Ignition switched off
▪ Brake pedal not depressed
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0.0 - 0.5 V
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- Check brake light switch -F- and read measured value block =>Page 01-368
, Display group number 003
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- Depress brake pedal
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approx. battery voltage
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- Adjusting brake light switch
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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Switch to measuring range:
Resistance measurement (2 kω)
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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5
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3 + 4
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Resistance of front right speed sender-G45
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▪ Ignition switched off
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1.0...1.3 kω
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- Disconnect speed sender connection -G45
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- Check wiring using current flow diagram
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- Wiggle wiring during test
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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If no fault can be located in the wiring:
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- Renew speed sensor -G45
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=> Brake systems; Repair group 45; Removing and installing parts of ABS system on front and rear axles
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Switch to measuring range:
Resistance measurement (2 kω)
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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6
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33 + 34
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Resistance of front left speed sensor -G47
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▪ Ignition switched off
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1.0...1.3 kω
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- Disconnect speed sensor connection -G47
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- Check wiring using current flow diagram
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- Wiggle wiring during test
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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If no fault can be located in the wiring:
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- Renew speed sensor -G47
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=> Brake systems; Repair group 45; Removing and installing parts of ABS system on front and rear axles
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Switch to measuring range:
Resistance measurement (2 kω)
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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7
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7 + 6
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Resistance of rear right speed sensor -G44
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▪ Ignition switched off
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1.0...1.3 kω
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- Disconnect speed sensor connection -G44
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- Check wiring using current flow diagram
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- Wiggle wiring during test
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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If no fault can be located in the wiring:
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- Renew speed sensor -G44
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=> Brake systems; Repair group 45; Removing and installing parts of ABS system on front and rear axles
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Switch to measuring range:
Resistance measurement (2 kω)
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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8
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37 + 36
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Resistance of rear left speed sensor -G46
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▪ Ignition switched off
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1.0...1.3 kω
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- Disconnect speed sensor connection -G46
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- Check wiring using current flow diagram
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- Wiggle wiring during test
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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If no fault can be located in the wiring:
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- Renew speed sensor -G46
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=> Brake systems; Repair group 45; Removing and installing parts of ABS system on front and rear axles
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Switch to measuring range:
Voltage measurement (2 V font=symbol charset=fontspecific code=64 descr='[ap]')
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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9
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3 + 4
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Front right speed sensor -G45- voltage signal
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▪ Vehicle raised
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- Check installation of speed sensor -G45- and rotor.
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▪ Ignition switched off
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- Rotate front right wheel at approx. 1 rev./sec.
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min. 65 mV alternating voltage
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- Check whether speed sensor -G45- has been interchanged and Read measured value block =>Page 01-368
, Display group number 001
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10
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33 + 34
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Front left speed sensor -G47- voltage signal
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▪ Vehicle raised
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- Check installation of speed sensor -G47- and rotor.
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▪ Ignition switched off
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- Rotate front left wheel at approx. 1 rev./sec.
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min. 65 mV alternating voltage
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- Check whether speed sensor -F47- has been interchanged. =>Read measured value block 01-368
, display group number 001
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Switch to measuring range:
Voltage measurement (2 V font=symbol charset=fontspecific code=64 descr='[ap]')
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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11
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7 + 6
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Rear right speed sensor -G44- voltage signal
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▪ Vehicle raised
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- Check installation of speed sensor -G44- and rotor.
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▪ Ignition switched off
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- Rotate rear right wheel at approx. 1 rev./sec.
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min. 190 mV alternating voltage
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- Check whether speed sensor has been interchanged and Read measured value block =>Page 01-368
, Display group number 001
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12
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37 + 36
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Rear left speed sensor -G46- voltage signal
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▪ Vehicle raised
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- Check installation of speed sensor -G46- and rotor.
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▪ Ignition switched off
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- Rotate rear left wheel at approx. 1 rev./sec.
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min. 190 mV alternating voltage
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- Check whether speed sensor -G46- has been interchanged and Read measured value block =>Page 01-368
, Display group number 001
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Functional check: ABS warning lamp -K47
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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13
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Function of ABS warning lamp -K47
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▪ Switch ignition on
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The warning lamp -K47- lights up for approx. 2 seconds and goes out again
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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- Fault in dash panel insert
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=> General body repairs; Repair group 70; Dash panel
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Functional check: Brake system warning lamp -K118
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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14
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-
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Function of brake system warning lamp -K118
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▪ Handbrake not applied
▪ Brake fluid level OK.
▪ Switch ignition on
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Warning lamp -K118- does not light up
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- Apply handbrake
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Warning lamp -K118- lights up
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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- Fault in dash panel insert
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=> General body repairs, interior; Repair group 70; Dash panel
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Functional check: Stability programme warning lamp -K155
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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15
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Function of stability programme warning lamp -K155
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▪ Switch ignition on
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Warning lamp -K155- lights up for 2 seconds and goes out again
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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- Fault in dash panel insert
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=> General body repairs; Repair group 70; Dash panel
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Functional check: TCS/ESP button warning lamp -E256- in test step 16, voltage measurement (20 V =) in test step 16a
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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16
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Function of TCS/ESP button -E256-
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▪ Ignition switched off.
▪ The function of the stability programme warning lamp -K155- was checked in test step 15.
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Warning lamp -K155- lights up for 2 seconds and goes out again
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- Operate TCS/ESP button -E256
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TCS/ESP warning lamp -K155- lights up
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- Operate TCS/ESP button -E256- again
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TCS/ESP warning lamp -K155- goes out
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Test step 16a: Continued on next page.
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Continuation of test step 16a
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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16a
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15 + 24
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Function of TCS/ESP button -E256
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- Connect test box V.A.G 1598/33
Switch ignition on
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- TCS/ESP button -E256- depressed and stability programme warning lamp -K155- lights up
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8.0 - 14.5 V
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- TCS/ESP button -E256- not depressed and stability programme warning lamp -K155- lights up
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3.5 - 5.0 V
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Test step 16a: Continued on next page.
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Continuation of test step 16a
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Test step
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V.A.G 1598 sockets
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Item tested
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▪ Test conditions
- Additional operations
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Specification
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Measures for deviations from specification
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16a
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15 + 24
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Function of TCS/ESP button -E256
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- TCS/ESP button -E256- not depressed and stability programme warning lamp -K155- does not light up
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0.0 - 1.0 V
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- Check wiring using current flow diagram
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=> Current flow diagrams, Electrical fault finding and Fitting locations binder
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TCS/ESP button -E256- defective
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- Renew TCS/ESP button -E256-
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=> General body repairs; Repair group 70; Dash panel
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