Porsche 928 - WORKSHOP MANUAL 1977 Workshop Manual page 150

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928 Wheels, Tires, Alignment
44
3. Select vehicle type and system (RDK)
Note:
If the display shows:
- No Data Exchange Possible
Restart: >
Terminate: N
- the > (Restart) button should be pressed.
If the RDK is not mentioned in the "ln-
stalled Systems" display, the reason may
be one of the following:
- Power supply to control unit interrupted
- No ground connection
- Leads K or L from diagnosis are not intact
- Control unit is faulty
4. Selection from menu
Possible RDK menus / Explanation
1 = Fault me-
Read out fault memory /
eliminate fault
Erase fault memory
2=-
Check HF sensor / speed sensor
3=&&t&2&
Pressure sensing switch test
1* =bem
Read out tire pressure loss
event memory
5. m on desired menu
Menu 1 = Fault memory:
From Page 44 305 on
Menu 2 = Sensors
Checking HF sensor and speed sensor:
Page 44 310
Menu 3 = Switch inputs:
Pressure switch test Page 44 .311
Menu l* = Events
Read out event memory for any tire pres-
sure losses during the past 8 journeys from
Page 44 - 312 on.
* Addltional RDK menu from control unit version R 02 on (introduced during 1991 model year),
This menu should normally have the serial number 4. However, since the tester only has selec-
tion buttons marked 1, 2 and 3, the menu at the top of the display,in this case the Events menu,
starts again with the number 1,
To change from the one to the other Menu 1 display (either Events or Fault Memory), use the >
or < keys (page forward, page backward).
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RDK diagnosis
44 - 303
Printed in Germany - Xxv, 1990