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 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 Central Electronic Module (CEM), Replacing
- For the location of and to replace the fuel pump (FP), see
- For the location of and to replace the fuel filter, see Replacing the fuel filter Removal and Replacement
- 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 Injector/pulse damper, replacement Service and Repair. For 6-cylinder engines, see
- For the location of and to replace the fuel pump (FP) relay, see Central electronic module (CEM), replacing Central Electronic Module (CEM), Replacing
- 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.