Brake System Vacuum Pump, Checking Electrically, From 06.02

Brake System Vacuum Pump, Checking Electrically, from 06.02

• Hand multimeter (V.A.G 1526 B)

• Adapter (V.A.G 1598/31)

Test Requirements

• Fuse 51 must be OK (remove fuse from fuse holder for test).

- Disconnect 6 pin connector.





Multi-Pin Connectors with Terminal Assignments

• All terminals omitted here are not occupied at the moment and must not be connected to other components under any circumstance.

Terminal Assignment of Harness Connectors for Voltage Supply and Self-Diagnosis









Test Steps, Overview





Test Table, Test Steps 1 through 4

• Socket designations of adapter cable, 121 pin (V.A.G 1598/31) are identical to terminal designations of the Engine Control Module (ECM) in wiring diagram.

• If the measured values do not match the specifications, carry out the corrective actions on the right side of the table.

• If measured values differ slightly from specified values, clean sockets and connectors of the testers and test leads (using contact spray (G 000 700 04)) and repeat test. Before replacing the relevant components, check wires and connections and repeat resistance measurement at component, especially for specified values under 10 ohms.