A/C Control Head -E87-, Electrical Testing

A/C Control Head -E87-, Electrical Testing


NOTE: The VAG 1598 test box and adapters must never be connected to the A/C control head -E87- while performing an on board diagnostic program with VAG 1551/1552 Scan Tool (ST).


Special tools, testers and auxiliary items







- VAG 1598 test box with VAG 1598/11 and VAG 1598/12 adapter cables
- Multimeter (Fluke 83 or equivalent)
- VW 1594 connector test kit
- VAG 1527B voltage tester (or equivalent diode type tester)
- Temperature sensor with suitable tester

Test conditions
- All fuses OK according to wiring diagram

Connecting VAG 1598 test box to connector for A/C control head -E87- using VAG 1598 adapters 11 and 12
- Switch ignition off.
- Remove A/C control head -E87-.
- Connect adapter leads VAG 1598/11 and 12 to connectors on vehicle wiring harness.


NOTE:
- Do not connect A/C control head -E87-.
- To carry out the measurement, connect the VAG 1598 test box to the relevant adapter lead.
- The socket assignment on VAG 1598/12 adapter corresponds exactly to the terminal assignment on the A/C control head -E87-.
- The socket assignment on VAG 1598 adapter does not correspond to the terminal assignment on the A/C control head -E87-.


Socket assignment for VAG 1598 test box with adapter lead VAG 1598/11


NOTE:
- The terminal assignment for connectors A and B on the VAG 1598/11 adapter does not match the socket assignment on the test box.
- The terminal assignment for connector C on the VAG 1598/11 adapter corresponds exactly to the socket assignment on the test box.
- The terminal assignment for connector D on the VAG 1598/12 adapter corresponds exactly to the socket assignment on the test box.
- Because the connectors for the A/C control head -E87- are distributed over two adapter leads ((VAG 1598/11 and VAG 1598/12) there is no Ground (GND) connection for testing purposes when only adapter lead VAG 1598/11 is connected. Therefore, for various steps of the electrical test it is necessary to use a suitable Ground (GND) point on the body of the car, or to use a second VAG 1598 test box. With the VAG 1598/12 adapters the Ground (GND) connection is through terminal 15.)

Connectors A, B & C: