Minor Leak. Permanent Fault
Minor leak. Permanent fault
999 5646 Pressure gauge 999 5646 Pressure Gauge
Identification
First read Identifying cars constructed according to ORVR Application and ID.
Is the car constructed according to ORVR?
Yes - Safety
No - Small leak. Permanent fault
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Small leak. Permanent fault
999 5646 Pressure gauge 999 5646 Pressure Gauge
Checking cables and terminals
- Check that the fuel tank filler cap is on properly and that its seal is intact.
- Check EVAP canister, roll-over valve, fuel pressure regulator and fuel tank hoses and hose connectors.
Were any faults detected?
Yes -
Remedy faults. Then continue with.
No -
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Remedy faults
- Remedy faults.
Continue -
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Checking fuel tank pressure sensor
- Start the engine and idle it.
Select Volvo Scan Tool (ST) to read off the value of the fuel tank pressure and canister purge (CP) valve. When the canister purge (CP) valve opens fuel tank pressure should drop.
Is the reading OK?
Yes -
No -
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Test pressurization of the fuel tank system
- Max 50 liters of fuel in the fuel tank.
- Ignition off.
- Clamp hose between canister purge (CP) valve and intake manifold with a hose clip to seal it off.
- Remove left fender liner.
- Remove EVAP canister and let it hang by its hoses.
- Carefully disconnect the EVAP canister shut-off valve hose from the EVAP canister.
- Connect tool 999 5646 Pressure gauge 999 5646 Pressure Gauge to EVAP canister.
- Set a pressure of 7 kPa.
Warning! MAX 10 kPa.
- Let the pressure build up for 5 minutes.
Close the cock (pressure may drop to 1-2 kPa before stabilizing) and read off pressure.
- Wait for 10 minutes.
Warning! Never leave the car unattended with its system pressurized.
- The pressure should be stable (it may rise a little due to fuel evaporation).
Is the pressure stable?
Yes -
No -
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Checking hose to EVAP canister shut-off valve
- Check hose to EVAP canister shut-off valve for airtightness and check connectors.
Are the hose and its connectors OK?
OK -
Try a new EVAP canister shut-off valve. Then continue with.
Not OK -
Remedy or replace hose. Then continue with.
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Replacing component
- Try a new EVAP canister shut-off valve.
Continue -
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Replacing or repairing component
- Remedy or replace hose.
Continue -
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Checking fuel tank pressure sensor hose
- Ignition off.
- Remove fuel tank pressure sensor according to Tank pressure sensor, replacement Removal and Replacement.
- Remove hose with Y-nipple.
- Check that the nipple and hoses are not blocked.
Are the nipple and hoses leaking?
Yes -
Remedy or replace hose or nipple. Then continue with.
No -
Try a new fuel tank pressure sensor. Then continue with.
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Replacing component
- Try a new fuel tank pressure sensor according to Tank pressure sensor, replacement Removal and Replacement.
Continue -
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Replacing or repairing component
- Remedy or replace hose or nipple.
Continue -
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Checking fuel tank system
- Ignition off.
- Carefully pressurize fuel tank system to 7 kPa.
Warning! MAX 10 kPa.
- Check fuel tank system by spraying it with soapy water from the EVAP canister to the canister purge (CP) valve and on the line with the pressure regulator and roll-over valve to the fuel tank. Check filler pipe and fuel tank filler cap.
- It may be necessary to lower the fuel tank according to Tank pressure sensor, replacement Removal and Replacement in order to fault-trace hoses and connectors on the top of the fuel tank.
Warning! Never leave the car unattended with its system pressurized.
Continue -
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reinstall all hoses/components.
- Erase diagnostic trouble codes (DTCs).
- Ignition on.
- Select Volvo Scan Tool (ST) to erase diagnostic trouble codes (DTCs).
Continue - Verification, continued
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Verification, continued
- Disconnect the Volvo Scan Tool (ST) from the VIDA station and use it in stand-alone mode.
- Run the engine to operating temperature (above 70°C).
- Air conditioning (A/C) off.
- Gear selector in P or N
- Engine idling
- Go into the Diagnostic Test Mode (DTM) menu. Activate leak diagnostic.
- Wait until the diagnostic is complete. This can take up to 2 minutes.
Note! If the texts START CONDITIONS NOT MET or DIAGNOSTIC INTERRUPTED are displayed the diagnostic cannot be carried out. This can have several causes: for example high fuel evaporation, high canister charge, high tank pressure, fuel trim not active or a diagnostic trouble code (DTC) stored after the diagnostic has been activated. Check that no diagnostic trouble codes (DTCs) are stored, restart the car and try to activate the diagnostic again. Sometimes several attempts will have to be made before the diagnostic is carried out.
Continue - Verification, continued
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Verification, continued
- Volvo Scan Tool (ST) connect to VIDA station.
- Ignition on.
- Select Volvo Scan Tool (ST) to read off diagnostic trouble codes (DTCs).
Does the diagnostic trouble code (DTC) recur?
Yes - VERIFICATION FAILED
No - VERIFIED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED -
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - Exit fault-tracing
No - Attempt New Test
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Attempt New Test -
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Safety
First read Safety regulations for handling fuel Safety Regulations For Handling Fuel.
Continue - Checking cables and terminals
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Checking cables and terminals
Check that the fuel tank filler cap is on properly and that its seal is intact.
Check hoses and hose connectors at the EVAP canister, EVAP canister shut-off valve and fuel tank.
Were any faults detected?
Yes - Verification
No - Checking fuel tank pressure sensor
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Checking fuel tank pressure sensor
- Start the engine and let it idle.
When the canister purge (CP) valve opens the pressure in the fuel tank should drop.
- Go into the scrolling values list and read off the value of the fuel tank pressure and canister purge (CP) valve.
Does the fuel tank pressure drop?
Yes - Test pressurization of the fuel tank system
No - Checking fuel tank pressure sensor hose
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Test pressurization of the fuel tank system
- Max 30 liters (7.93 US gal.) of fuel in the fuel tank.
- Ignition off.
- Clamp hose between EVAP canister shut-off valve and EVAP canister with a hose clip to seal it off.
- Carefully disconnect the EVAP canister hose from the canister purge (CP) valve.
Connect manometer 999 5646 Pressure gauge 999 5646 Pressure Gauge to hose and pressure regulator 999 5544 REGULATOR 999 5544 Regulator to manometer.
Set pressure to 7 kPa (1.02 psi) (read off on the manometer 999 5646 Pressure gauge 999 5646 Pressure Gauge ).
Cock at right angles to the hoses.
Warning! Max 10 kPa (1.45 psi).
Let the pressure build up for 5 minutes.
Shut off the cock (the pressure may drop 1-2 kPa (0.14 - 0.29 psi) before stabilizing) and read off pressure.
EVAP canister hose cock.
Wait for 10 minutes.
Warning! Never leave the car unattended with its system pressurized.
The pressure should be stable (it may rise a little due to fuel evaporation).
Is the pressure stable?
Yes - Checking hose to EVAP canister shut-off valve
No - Checking fuel tank system
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Checking hose to EVAP canister shut-off valve
Check hose to EVAP canister shut-off valve seal and check connectors.
Is the hose OK?
Yes - Replacing component
No - Replacing or repairing component
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Replacing component
Try a new EVAP canister shut-off valve according to Replacing the EVAP canister shut-off valve Replacing the EVAP Canister Shut-Off Valve.
Continue - Verification
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Replacing or repairing component
Remedy or replace hose.
Continue - Verification
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Checking fuel tank pressure sensor hose
- Ignition off.
- Remove fuel tank pressure sensor. Tank pressure sensor, replacement Removal and Replacement.
- Remove hose with Y-nipple.
Check that the nipple and hoses are not blocked.
Are the nipple and hoses blocked?
Yes - Replacing or repairing component
No - Replacing component
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Replacing or repairing component
Remedy or replace hose or nipple.
Continue - Verification
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Replacing component
Try a new fuel tank pressure sensor according to Replacing fuel tank pressure sensor Removal and Replacement.
Continue - Verification
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Checking fuel tank system
- Ignition off.
- Carefully pressurize the fuel tank system to 7 kPa (1.02 psi).
EVAP canister shut-off valve right angles to the hoses.
Warning! Max 10 kPa (1.45 psi)
Check fuel tank system by spraying it with soapy water from the EVAP canister to the canister purge (CP) valve and on the line with the pressure regulator and roll-over valve to the fuel tank. Check filler pipe and fuel tank filler cap.
It may be necessary to lower the fuel tank. Tank pressure sensor, replacement Removal and Replacement , in order to fault-trace hoses and connectors on the top of the fuel tank.
Warning! Never leave the car unattended with its system pressurized.
Continue - Verification
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Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied as follows:
- Ignition off.
- Reinstall all hoses/components.
- Erase diagnostic trouble codes (DTCs).
- Run the engine to operating temperature (above 70 °C (158 °F)).
- Air conditioning (A/C) off.
- Gear selector in P or N
- Engine idling
- Go into diagnostic test menu. Select leakage diagnostic.
- Wait until the diagnostic is complete. This can take up to 2 minutes.
Read off diagnostic trouble codes (DTCs).
Note! If the texts START CONDITIONS NOT MET or DIAGNOSTIC INTERRUPTED are displayed the diagnostic cannot be carried out. This can have several causes: for example high fuel evaporation, high canister charge, high tank pressure, fuel trim not active or a diagnostic trouble code (DTC) stored after the diagnostic has been activated. Check that no diagnostic trouble codes (DTCs) are stored, restart the car and try to activate the diagnostic again. Sometimes several attempts will have to be made before the diagnostic is carried out.
Does the diagnostic trouble code (DTC) recur?
Yes - VERIFICATION FAILED
No - VERIFIED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Attempt New Test - Checking cables and terminals
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