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Test procedure Heater-specific diagnosis
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2 Heater-specific diagnosis
2.1. Test procedure
NOTE
The heater must be connected to the vehicle’s electrical system but not
necessarily operating to execute a test function.
If the adapter is not connected or connected to the wrong port or the
heater is not on or not properly connected, an error message will be
displayed. In this case check the above causes.
The program monitors the connection to the heater and identifies
disconnects. Irregular disconnects (e.g. pulling a plug during the test)
will result in the message “Timeout” being displayed in the status
window.
Specific notes on the various types of heaters:
Thermo Top Z/C:
If the diagnostic cable is connected, the heater (depending on the
version) cannot be started using the timer or the Telestart. In this case
first disconnect the diagnostic cable, start the heater and then reconnect
the diagnostic cable.
BBW46S/DBW46S:
After the diagnosis has been started the heater enters a diagnostic
mode with a run-down.
Thermo Top P:
The UP (circulating pump) button is not permanently activated during
diagnosis; instead, it flashes at various frequencies depending on the
operating status of the circulating pump.
DW 230..350/Thermo 230..350:
The diagnostic port may suffer malfunctions when errors from this unit
are saved. The diagnostic program detects these malfunctions and will
rectify the problem by deleting the error memory (saved error data will
be lost).
The pump pressure test is not possible.
Thermo 50 MAN/trade:
The Thermo 50 MAN/trade heater does not need to be switched on
during the diagnosis.
After a TRS condition has been triggered, the heater may only be
restarted as follows:
• Switch off the heater
• To exit the diagnosis
• Wait at least 10 s
101493_PCTe_gb.book Seite 12 Donnerstag, 16. Juni 2005 11:47 11