Checking Fuel and Residual Pressures

CHECKING FUEL AND RESIDUAL PRESSURES

Note! For vehicles with demand activated fuel pumps (FP), see VIDA vehicle communication Quick test of fuel pump (FP).




Measuring the line pressure
Connect the pressure gauge according to Fuel pressure gauge
Remove the soundproofing panel Remove the fuel pump (FP) relay (CMI 12 in the passenger compartment)
Connect a cable to the relay base as illustrated.
Read off the line pressure from the pressure gauge.
The line pressure must be 375-395 kpa.
Check the residual pressure if the fuel pressure is OK.
Remedy as necessary


Checking the residual pressure
Switch off the ignition
Disconnect the cable between the terminals on the relay base
Reinstall the fuel pump (FP) relay.
The line pressure must not fall below 200 kPa within 20 minutes of the fuel pump (FP) being shutoff.
Remedy as necessary.