Fuel Pressure - Testing: Other Volvo XC90 I

TAKING FUEL PRESSURE READINGS WHILE DRIVING THE CAR

Special tools

see 9995011

see 9512614

see 9812270

see 9812273

see 9812282

Scheme 123

Corrective actions

1. Assemble fuel pressure gauge see «9995011»(ref-460875-S20764046072012033000000) and new adapter hose 951 2614 .
2. Use foam wrapping around the fuel pressure gauge and all metal joints to avoid scratching the interior of the car or damaging the exterior paintwork.

Scheme 124

Corrective actions

1. Remove protective cap from the fuel pressure line nipple.
2. Install the adapter hose nipple loosely on the nipple on the fuel pressure line. The nipple will be tightened later.
3. Arrange hose as shown in the illustration.

Scheme 125

1. Install the T-valve to the left door mirror using tape. NOTE: Protect the door mirror and wing edge with foam protection as shown in the illustration.

Scheme 126

The unit must be operating when the measuring equipment's hose is connected to the engine in order to reduce the risk of fuel spillage.

Corrective actions

1. Connect the fuel drainage unit hose to the T-valve on the door mirror (position 3 in illustration).
2. Turn the T-valve cock to the middle position (position 2 in the illustration).
3. Start the evacuation unit to get suction in the measurement unit hose to the engine.

Scheme 127

Corrective actions

1. Tighten nipple on fuel rail.

Scheme 128

1. Turn the T-valve cock so that it is pointing toward the engine (position 1 in the illustration) to shut off the suction from the evacuation equipment.

Scheme 129

1. Use a tie strap to lock the cock in the position toward the engine.

Scheme 130

1. Remove the draining unit hose from the T-valve hose connector.
2. Turn off the evacuation unit when the hose is empty.
3. Arrange the measuring equipment hose along the rubber list on plenum chamber cover at the left bonnet hinge in such a position that the hose and bonnet are not damaged.
4. Carefully close the hood.

Scheme 131

Corrective actions

1. Start the engine.
2. Drive the car and read off fuel pressure while the car is being driven. The fuel pressure should be: 375-395 kPa (54.4 - 57.3 psi) .

Scheme 132

Corrective actions

1. Connect the evacuation unit hose to the hose nipple on the door mirror (see black arrow in illustration).
2. Start the evacuation unit so there is suction in the hose.

Corrective actions

1. Remove the tie strap locking the cock on the T-nipple.
2. Turn the cock to the middle position (position 2) to obtain suction in the hose to the nipple in the fuel manifold on the engine.

REFERENCE

Reference phase for leakage, and operating check of the leak diagnostic unit (DMTL), is in progress.

If no fault is detected during this phase, the check for major leakage starts.

If a fault is detected during this phase the test is stopped and the parameter "DMTL, test status" shows "Fault Found". The diagnostic trouble code (DTC) for the detect fault is stored in the Engine control module (ECM).

MAJOR LEAK

Investigation of the fuel tank system in progress.

If no fault is detected during this phase, the check for minor leakage starts.

If leakage is detected during this phase the test is stopped and the parameter "Tank system test result" shows "Major leak found". The diagnostic trouble code (DTC) is stored in the Engine control module (ECM).

MINOR LEAK

Investigation of the fuel tank system in progress.

If leakage is detected during this phase the test is stopped and the parameter "Tank system test result" shows "Minor leak found". The diagnostic trouble code (DTC) is stored in the Engine control module (ECM).

NOT IN PROGRESS

Leakage diagnosis not in progress. Quick-test tank system has not started, has been finished, or has been blocked.

Reference phase for leakage, and operating check of the leak diagnostic unit (DMTL), is in progress.

If no fault is detected during this phase, the check for major leakage starts.

If a fault is detected during this phase the test is stopped and the parameter "DMTL, test status" shows "Fault Found". The diagnostic trouble code (DTC) for the detect fault is stored in the Engine control module (ECM).

Investigation of the fuel tank system in progress.

If no fault is detected during this phase, the check for minor leakage starts.

If leakage is detected during this phase the test is stopped and the parameter "Tank system test result" shows "Major leak found". The diagnostic trouble code (DTC) is stored in the Engine control module (ECM).

Investigation of the fuel tank system in progress.

If leakage is detected during this phase the test is stopped and the parameter "Tank system test result" shows "Minor leak found". The diagnostic trouble code (DTC) is stored in the Engine control module (ECM).

Leakage diagnosis not in progress. Quick-test tank system has not started, has been finished, or has been blocked.

SAFETY

First read, see SAFETY REGULATIONS FOR HANDLING FUEL .

Note. The tank must not be more than 85% full when test pressurizing.

Scheme 133

Ignition off.

Block the hose between the leak diagnostic module and the leak diagnostic module filter by clamping the hose using hose clips.

Scheme 134

Expose the canister purge (CP) valve.

Disconnect the hose (1) between the EVAP canister and the EVAP canister purge valve.

Connect manometer see 9995646 to the hose (1) and the pressure regulator see 9995544 to the manometer.

Connect compressed air to the pressure regulator

Set the pressure to a maximum of 7 kPa (read off from manometer 999 5646).

Pressurize the fuel tank system by turning the cock at right angles to the hoses.

Allow pressure to build up in the tank system.

Check that the system does not leak.

Stop the pressurization by turning the cock towards the hose (1) as illustrated by " A " in (Scheme 134)

Note. A certain amount of leakage may occur from the leak diagnostic unit. The pressure may therefore drop when the pressurization is stopped. This is normal. The leakage is caused because the pressurization is not carried out using the leak diagnostic unit.