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Troubleshooting General
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4 Troubleshooting
4.1. General
When you select a test function, an error message is displayed.
• Check if the diagnostic adapter is connected to the selected serial
port or the USB port on the PC and that heater is properly connected.
• Check whether the heater is switched on and is receiving power.
• Is there an earth connection (apart from via the diagnostic cable)
between the PC and the vehicle? If so immediately disconnect the
diagnostic cable and disconnect the relevant connection to prevent
damage to the adapter and PC.
• The control unit may be defective (check with a different unit before
replacing it).
• A control unit that has no diagnostic capability may have been
selected.
• An incorrect connection on the control unit has been used for the
diagnostic cable.
• If you are using an RS232 (COM) port:
If another program (e.g. keypad or mouse) is accessing the port, this
application must be closed.
101493_PCTe_gb.book Seite 25 Donnerstag, 16. Juni 2005 11:47 11