Wiring And Component Check Using Test Box V.A.G 1598/31

Wiring And Component Check Using Test Box V.A.G 1598/31

NOTE:







- Test box V.A.G 1598/31 is designed for simultaneous connection to the engine control module wiring harness and the actual engine control module.
- The advantage of this is that the electronic engine management system remains fully operational with the test box connected (e.g. measurement of signals with engine running).
- Whether or not the engine control module is additionally to be connected to the test box is indicated in the appropriate test sequences.
- Use portable multimeter V.A.G 1526 or multimeter V.A.G 1715 and diode test lamp V.A.G 1527 for testing.
- Always use test leads from adapter set V.A.G 1594 for connection of testers to test box V.A.G 1598/31.

CAUTION: To prevent damage to electronic components, select required measuring range before connecting test leads and observe test conditions.

Connecting test box V.A.G 1598/31
- Switch off ignition.
- Remove cover of electronics box for control modules in plenum chamber.

NOTE: If the engine control module is provided with a sheet-metal enclosure, this must be separated from the engine control module for connection of the test box. On completion of repair work install the sheet metal enclosure to the engine control module again.







- Use screwdriver to carefully pry off fastener (arrow).
- Release and disconnect control module connectors.







- Connect test box V.A.G 1598/31 to wiring harness connector. Ground clip (arrow) must be connected to Ground. Whether or not engine control module is additionally connected to test box is indicated in appropriate test sequences.
- Perform testing as described in appropriate repair operations.

After installing engine control module
- After reconnecting engine control module, check adaptation to throttle valve control module.
- On vehicles with automatic transmission, kickdown function must be adapted.