Scan Tool Testing and Procedures

Wire and component test using VAG1598/31 test box


NOTE:
- Always use VAG1594A connector test kit to attach measurement devices (e.g. VAG1527B voltage tester, VAG1526 multimeter etc.).
- The terminal numbers on the connector correspond to the socket numbers on the test box.


WARNING!
To avoid damaging electronic components, set measuring range before connecting test leads and observe all test requirements.


- Switch ignition off.







- Pull off rubber seal of plenum chamber cover in direction of arrow.
- Remove cover -1- toward front.







- Remove heater core E-box cover (arrows).







- Using a screwdriver, carefully pry off retaining bracket (arrow).







- Disengage connector catches (arrows) and disconnect harness connectors -1- and -2- from control module.







- Connect VAG1598/31 test box to disconnected harness connector of Engine Control Module (ECM) (control module remains free). Ground (GND) clip at test box (not visible in illustration) must be connected to Ground (GND).