Verification conditions
The minimum battery voltage should be 11.5 V.
Fuse SD34 in the fuse box on the right side of the front panel should be good.
The fuel pump control unit must be OK.
Engine codes BLR, BLX, BLY
The fuel pressure sensor for low pressure should be good.
Note: The operation of the fuel pump is checked by diagnosing the actuators.
Connect tester A.
Insert the connector of the diagnostic cable into the diagnostic connector in the driver's foot area.
Turn on the ignition.
On the display, click on the fields in turn «Vehicle self-diagnosis», «01 - engine electronics» and «03 - diagnostics of executive elements».
Press the right arrow button on the display and hold it until the «Diagnosis of the final element of the fuel pump electronics».
The fuel pump should then slowly increase the speed to maximum speed.
Switch off the ignition.
If the fuel pump does not turn on, remove the bench seat.
Pic. 2.204. Fuel supply module cover and control unit
Disconnect the fuel pump control unit connector (pic. 2.204).
Pic. 2.206. Power connector pinouts
Check the power supply with a probe between pins 1 and 6 (pic. 2.206).
The LED should be on.
If the LED does not light up, look for an open in the wiring diagram and repair it.
If the LED is on (food is ok), remove the fuel supply unit.
Check if the electrical wires are connected between the flange and the fuel pump.
If there are no breaks in the connection, then the fuel pump is faulty, the fuel supply unit should be replaced.
Visitor comments