Checking Fuel and Residual Pressures

Checking fuel and residual pressures

Note! To check the fuel and residual pressures for S70/V70/C70, see Fuel System Pressure, Checking

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 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.

Other information:
- For the location of and to replace the fuel pump (FP) relay, see Central electronic module (CEM), replacing Service and Repair
- For the location of and to replace the fuel pump (FP), see Service and Repair
- For the location of and to replace the fuel filter, see Replacing the fuel filter Service and Repair
- To disconnect the pressure gauge, see Fuel pressure gauge Fuel Pressure Gauge

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 shut-off.
Remedy as necessary.

Other information:
- For the location of and to replace the injector on 5-cylinder engines, see Service and Repair. For 6-cylinder engines, see Service and Repair
- For the location of and to replace the fuel pump (FP) relay, see Central electronic module (CEM), replacing Service and Repair
- For the location of and to replace the fuel pump (FP), see Right side fuel pump with level sensor Right Side Fuel Pump with Level Sensor
- To disconnect the pressure gauge, see, Fuel pressure gauge Fuel Pressure Gauge.