9-3 SE Sedan (9400) L4-2.0L Turbo (B204) HO (1999)
/l4-2.0l_turbo_(b204)_ho/Page-1767004.png)
The fuel pump relay is located in the relay holder under the dashboard by the steering wheel. This relay supplies the fuel pump. The fuel pump relay is
controlled from control module pin 56, which is grounded to operate the relay.
If the ignition has been turned off for longer than 15 minutes, the fuel pump relay will operate for 2 seconds when the ignition key is turned to the ON
position. This is to build up pressure for pre-injection when the crankshaft starts to rotate.
The fuel pump relay then operates as soon as the control module receives impulses from the crankshaft position sensor
Diagnosis
-
There is no diagnosis for the electric circuit to the relay. When the pump relay is activated with Tech 2, it will click but the pump will not run
because the relay pin 30 is not supplied when the main relay is inactive. The main relay circuit can be supplied from fuse 16b.
