Test table (test steps 1 - 6)
WARNING: This page is about a different variant/trim than selected.
Notes on test table
- The socket designations of adapter VAG 1598/31 (for test step 2) are identical to the engine control module 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
- 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.
| Switch to measuring range: Resistance measurement (Ω) |
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| Test step | Contact | Item tested |
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Specification | Measures for deviations from specification |
| 1 | 1 + Ground | Resistance of -V192- brake system vacuum pump |
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5.0...5.3 Ω |
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| 2 | 2 + pin 22 | Communication signal of engine control unit to -V192- brake system vacuum pump |
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0.0...0.1 Ω |
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| Switch to measuring range: Voltage measurement (20 V =) |
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| Test step | Contact | Item tested |
|
Specification | Measures for deviations from specification |
| 3 | 3 + 1 | Voltage supply from ignition/starter switch to -V192- brake system vacuum pump |
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12.0...12.60 V (approx. battery voltage) |
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| Switch to measuring range: Resistance measurement (Ω) |
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| Test step | Contact | Item tested |
|
Specification | Measures for deviations from specification |
| 4 | 3 + fuse 31 | Resistance of connection of ignition/starter switch to -V192- brake vacuum pump |
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0.1...0.9 Ω |
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| Switch to measuring range: Resistance measurement (Ω) |
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| Test step | Contact | Item tested |
|
Specification | Measures for deviations from specification |
| 5 | 5 + fuse 51 | Resistance of connection of battery to -V192- brake system vacuum pump |
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1.7...1.8 Ω |
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| Switch to measuring range: Voltage measurement (20 V =) |
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| Test step | Contact | Item tested |
|
Specification | Measures for deviations from specification |
| 6 | 5 + 1 | Voltage supply of Battery to -V192- brake system vacuum pump |
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12.0...12.81 V (approx. battery voltage) |
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