Fuel-Pump Relay (R50)

Fuel-pump relay (R50)
Fuel-Pump Relay

Function
The fuel-pump relay is used to control the fuel pump. When the ignition is switched on, the fuel pump is supplied with current. The fuel-pump relay remains energized as long as the engine is running. When the engine is not running, the relay is switched off with a time delay. The relay is immediately switched to OFF when the engine is shut down and, following a delay time, the ignition key is detected as in position ��OFF��. The relay is supplied with current directly from the ignition switch and it is activated when the engine control module connects to ground.

A crash sensor is installed between the relay and the ignition switch. If the sensor is triggered in a collision, this switches off the fuel-pump relay. The crash sensor must be reset manually.

Installation location
The fuel-pump relay is located in the passenger compartment fuse box.

Failure
If the fuel pump fails, the engine is stopped due to lack of fuel.
ck of fuel.