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ESP Electrical check
Electrical check; Test steps 1-12
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Measuring resistance: Set measuring range (200 ω) on V.A.G 1526
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Test step
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V.A.G 1598/20 sockets
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Testing of
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▪ Test conditions
- Additional operations
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Specified value
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Action in the event of deviation from specified value
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1
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5 + 3
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Inlet valve -N101, outlet valve -N102, front left
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- Infinite resistance indicates an open circuit in wiring. Check accordingly.
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2
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55 + 26
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Inlet valve -N99, outlet valve -N100, front right
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9ω/22ω
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- A resistance reading below the specified range indicates a short between the two wires. Check accordingly.
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3
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53 + 25
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Inlet valve -N134, outlet valve -N136, rear left
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- In all cases test wiring for short to earth and short to positive.
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Measuring resistance: Set measuring range (200 ω) on V.A.G 1526
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Test step
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V.A.G 1598/20 sockets
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Testing of
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▪ Test conditions
- Additional operations
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Specified value
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Action in the event of deviation from specified value
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4
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6 + 4
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Inlet valve -N133, outlet valve -N135, rear right
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9ω/22ω
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=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
If electrical wiring is OK renew hydraulic unit.
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5
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49 + 50
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- Switch valve 1 for ESP -N225
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- Infinite resistance indicates an open circuit in wiring. Check accordingly.
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- Switch valve 2 for ESP -N226
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12ω/28ω
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- A resistance reading below the specified range indicates a short between the two wires. Check accordingly.
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Measuring resistance: Set measuring range (200 ω) on V.A.G 1526
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Test step
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V.A.G 1598/20 sockets
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Testing of
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▪ Test conditions
- Additional operations
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Specified value
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Action in the event of deviation from specified value
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6
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52 + 54
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- High-pressure switch valve 1 for ESP -N227
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6ω/16ω
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- In all cases test wiring for short to earth and short to positive.
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- High-pressure switch valve 2 for ESP -N228
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=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
If electrical wiring is OK renew hydraulic unit.
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7
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8 + 10 1)
9 + 10 2)
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Speed sensor -G47, front left
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400ω/2300ω
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- Infinite resistance indicates an open circuit in wiring. Check accordingly.
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The output connections on control unit -J104 are wired differently for the various different versions.
1) 4WD vehicles
2) FWD vehicles
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Measuring resistance: Select measuring range on V.A.G 1526 (2 kω or 20 kω)
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Test step
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V.A.G 1598/20 sockets
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Testing of
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▪ Test conditions
- Additional operations
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Specified value
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Action in the event of deviation from specified value
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8
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15 + 16
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Speed sensor -G45, front right
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- A resistance reading below the specified range indicates a short between the two wires. Check accordingly.
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9
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13 + 14
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Speed sensor -G46, rear left
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400ω/2300ω
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- In all cases test wiring for short to earth and short to positive.
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10
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11 + 12
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Speed sensor -G44 rear right
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=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
If the electrical wiring is OK renew the relevant speed sensor.
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Measuring resistance: Select measuring range on V.A.G 1526 (200 ω)
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Test step
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V.A.G 1598/20 sockets
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Testing of
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▪ Test conditions
- Additional operations
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Specified value
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Action in the event of deviation from specified value
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11
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2 + 37 1)
2 + 36 2)
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Actuation of solenoid valve relay -J106
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- Infinite resistance indicates an open circuit in wiring.
A resistance reading below the specified range indicates a short between the two wires.
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12
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2 + 7
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Actuation of return pump relay -J105
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5font=symbol charset=fontspecific code=48 descr='[nd0]'ω/70ω
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- In all cases test wiring for short to earth and short to positive.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
Replace relay if wiring is OK and specified value is not attained.
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The output connections on control unit -J104 are wired differently for the various different versions.
1) Vehicles with control unit 4B0 907 389
2)Vehicles with control unit 8D0 907 389/A/D/E
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