Fuel Pump; Voltage Stabiliser - Fiat TIPO Handbuch

Fuel pump

When the S&S system is activated, during the engine stopping stages the fuel pump remains active.
This guarantees the supply system filling and a ready start-up.
When the engine does not run for a certain period of time, the pump is switched off.

Voltage stabiliser

The voltage stabiliser maintains the supply voltage of some devices (the radio receiver in particular)
within values which guarantee that the supply voltage is maintained during the engine start-up
stages.
The voltage stabiliser consists of an electronic unit directly connected to the battery.
It is positioned under the dashboard, on the right side, as shown in the figure.
Operation.
With the key on STOP: the T1 relay switch is closed and the device is completely bypassed. In these
conditions the battery positive is applied to +30 of the radio and to the entire Hi-Fi system, if present.
With the key on MAR (+15 present) and during the start-up stage (+50 present), the T1 relay switch
is opened and the T2 and T3 relay switches are closed. In this way +30 of the battery can pass
through the voltage stabilizer because in this condition a voltage drop can cause a temporary audio
interruption or the stored channels can be lost.
Diagnosis
The diagnosis is performed through the NBC to which the diagnosis cable (DIAG) is connected.
The fault status is signalled to the NBC by means of a low digital signal.
NOTE:
Two types of stabilisers are available: 90 W if the car is only equipped with the radio and 180 W if it
has both the radio and the Hi-Fi system.
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FIAT TIPO -49- 0.0
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