Electrical Testing

Electrical Testing
Special tools and equipment





^ Multimeter V.A.G. 1526 A





^ Test box V.A.G. 1598/21

Note:
^ For testing, use Multimeter V.A.G. 1526 A or VAS 5051 Vehicle Diagnosis, Measurement and Information System. The charts contain the specific measurement methods which have to be set up before the corresponding measurements.
^ The specified values given are valid for an ambient temperature of 0°C to 40°C.
^ If the values measured deviate from the specified values, determine the malfunction using the wiring diagram.
^ If the values measured show only a minor deviation from the specified values, clean cavities and plugs on the test equipment and test leads, repeat test. Before replacing the components in question, check their wires and connectors. In particular with specified values below 10 a repeat the resistance measurement on the component.
^ The terminal numbers of the connector and the cavity numbers on the V.A.G. 15.98/21 test box match.

CAUTION: In order to avoid destroying electronic components, the specific measurement range on the measuring equipment must be switched on before connecting the test leads.

Test requirements:
^ Vehicle power supply 0. K.
^ Power supply and fuses for particular system OK
Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder
^ Ground connections for transmission O.K.
Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder
^ Check ground connections for corrosion and faulty connection, repair as needed.
Refer to Electrical Wiring Diagrams, Troubleshooting and Component Locations binder
^ Check battery ground strap and ground strap between battery and transmission.

Test procedure
^ Switch ignition OFF.





^ Undo quick release fasteners -2- and -3- and remove sound deadening at rear. Sound deadening at front remains installed.
^ Loosen cover for vehicle floor and heat shield above exhaust system in rear area of transmission. Push heat shield a little to one side.





^ Unlock connector -A- in direction of arrow and disconnect it from transmission.
^ Uncover wiring harness.
^ Connect test box V.A.G. 1598/21 to wiring harness to control module.
^ Perform test as described in specific test chart.