Valeo Thermo plus 160 - Page 39

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Thermo plus 160/230/300/350 5 Troubleshooting
5.6.13 Circulating pump inspection
ATTENTION:
The circulating pump fuse may never be pulled, while
the pump is running.
Inspection using the STT diagnosis
• Check electrical connections as well as the leak-tight-
ness of the cooling system.
• Disconnect the heater from the vehicle electrical
system (Observe 5.2 !).
• Connect the test plug instead of the temperature
sensor plug to the control device.
• Connect the heater to the vehicle electrical system.
• Connect the STT diagnosis to the heater.
• Start STT diagnosis, establish connection to the
heater and open the Component Test menu.
• Select the circulating pump in the Component Test
menu and start the component test.
• After the test is completed, exit STT diagnosis as
needed.
• Disconnect the heater from the vehicle electrical
system (Observe 5.2 !).
• Disconnect the test plug and reconnect the tempera-
ture sensor plug.
• Reonnect the heater to the vehicle electrical system.
Fig. 513 Nozzle block preheater
Heating element
Thermostat
Holding clamp