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Contents

Wiring diagrams Section: Testing & Diagnostics

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 of 14 (Convertible): Diagnosis
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 of 14 (Convertible): Wiring
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 1 of 14 (Convertible): Other

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Diagnosis
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Removal & Installation
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Wiring
Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 2 of 14 (Convertible): Other

Engine Control Module (ECM) DTC Index - B5234T3 (Convertible)

Engine Control Module (ECM) DTC Index - B5244T (Convertible)

Engine Control Module (ECM) Diagnostic Trouble Code (DTC) Index - (B5234T3) (Coupe)

Engine Control Module (ECM) Diagnostic Trouble Code (DTC) Index - B5244T (Coupe)

All sections

Engine Performance Diagnostic Trouble Code (DTC) Diagnostics - 8 of 14 (Convertible): Other Volvo C70 I

Testing & Diagnostics 22 illustrations ~13804 words

Checking fuel injection system, ignition system and components

The diagnostic trouble code (DTC) indicates which cylinder has misfired.

Diagnostic Trouble Code (DTC)	Misfiring cylinder
ECM-3512	1
ECM-3522	2
ECM-3532	3
ECM-3542	4
ECM-3552	5

Check that engine oil level is correct.

Check the spark plugs, search for damage in the insulation and other damage.

Check ignition spark.

Check fuel pressure and residual pressure according to Checking fuel and residual pressures .

Check that the engine is airtight according to Compression test .

Check for air leakage according to Check for air leaks in the intake system .

Check flywheel for damage.

Other information

information about the misfire diagnostic, see «Misfire diagnostic»(ref-438318-S14366391022011120100000) .

Scheme 380

Continue Refer to «Verification»(ref-404045-S22560437302011061000000)

Verification

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 381

Scheme 381: Verification

Scheme 382

Scheme 383

Ignition off.
Reinstall connectors, components etc.
Start the engine. Check that the misfire counter counts upwards and that the engine is firing on all cylinders. Also check that the misfire diagnostic system is active. If not check the conditions according to «Misfire diagnostic»(ref-438318-S14366391022011120100000) .

Does the misfiring counter count upwards?

YES Refer to «Information»(ref-404045-S18768627072011061000000)
NO VERIFIED: Troubleshooting has been completed.

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.

Checking the fuel injection system, ignition system and components

Note. In the event of diagnostic trouble codes (DTCs), that affect camshaft control or camshaft reset valve, these must be fault-traced first.

The diagnostic trouble code (DTC) indicates which cylinder has misfired

Diagnostic Trouble Code (DTC)	Misfiring cylinder
ECM-3513	1
ECM-3523	2
ECM-3533	3
ECM-3543	4
ECM-3553	5
ECM-3563	6

Check that the engine oil level is correct.

Check the spark plugs. Search for damage in the insulation and other damage.

Check the ignition spark.

Check the function of the crankcase ventilation.

Check the fuel pressure and residual pressure. Checking fuel pressure and residual pressure in the workshop

Check if there is any air leakage. Air leakage in the intake system, checking

Check that the engine seals tight. Compression test

Check the flywheel for damage.

Other information

for information about the misfire diagnostic, see «Misfire diagnostic»(ref-438318-S14366391022011120100000) .

Continue Refer to «Verification»(ref-404045-S40696781762011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Scheme 384

Ignition off.
Reinstall the connectors, components etc.
Start the engine. Check that the misfire counter is not counting upwards. Check that the engine is firing on all cylinders. Also check if the misfire diagnosis is active, if not, check the conditions according to: «Misfire diagnostic»(ref-438318-S14366391022011120100000)

Does the misfire counter count up?

YES Refer to «Information»(ref-404045-S24259461712011061000000)
NO VERIFIED: Troubleshooting has been completed.

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.

The diagnostic trouble code (DTC) indicates which cylinder has misfired.

Diagnostic Trouble Code (DTC)	Misfiring cylinder
ECM-3513	1
ECM-3523	2
ECM-3533	3
ECM-3543	4
ECM-3553	5

Check that engine oil level is correct.

Check the spark plugs, search for damage in the insulation and other damage.

Check ignition spark.

Check fuel pressure and residual pressure according to Checking fuel and residual pressures .

Check that the engine is airtight according to Compression test .

Check for air leakage according to Check for air leaks in the intake system .

Check flywheel for damage.

Other information

information about the misfire diagnostic, see «Misfire diagnostic»(ref-438318-S14366391022011120100000) .

Continue Refer to «Verification»(ref-404045-S32184460672011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reinstall connectors, components etc.
Start the engine. Check that the misfire counter counts upwards and that the engine is firing on all cylinders. Also check that the misfire diagnostic system is active. If not check the conditions according to «Misfire diagnostic»(ref-438318-S14366391022011120100000) .

Does the misfiring counter count upwards?

YES Refer to «Information»(ref-404045-S20512772042011061000000)
NO VERIFIED: Troubleshooting has been completed.

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.

Faulty signal. Permanent fault

See Faulty signal. Permanent fault

Emissions impact / catalytic converter damage

See Emissions impact / catalytic converter damage

See Faulty signal. Permanent fault

See Emissions impact / catalytic converter damage

See Faulty signal. Permanent fault

See Emissions impact / catalytic converter damage

See Faulty signal. Permanent fault

See Emissions impact / catalytic converter damage

See Faulty signal. Permanent fault

Checking cables and connectors

Check canister purge (CP) valve connector for contact resistance and oxidation according to Contact resistance and oxidation and loose connections according to Loose connections (terminals) .

Check signal cable between control module #A9 (#A9) and canister purge (CP) valve terminal 2 and power supply between system relay terminal 3 and canister purge (CP) valve terminal 1 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
To access/replace the canister purge (CP) valve, see «Replacing the canister purge (CP) valve»(ref-403955-S02600930382011061000000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Scheme 385

Scheme 386

Continue Refer to «Information»(ref-404045-S15735443392011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Signal missing. Intermittent fault

See Signal missing. Intermittent fault

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components
Ignition on.
Activate canister purge (CP) valve. A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S27271207832011061000000)

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.

Checking the connector

Ignition off
Check the evaporative emission system (EVAP) valve connector. Check for contact resistance and oxidation
Reinstall the components, reconnect the connectors etc.
Ignition on
Activate the evaporative emission system (EVAP) valve. A click should be heard when the evaporative emission system (EVAP) valve is activated. If the evaporative emission system (EVAP) valve is now OK this indicates that the fault was caused by poor contact in the connector. Other information: For the location of components on 5 cylinder engines, see «Location of components»(ref-404036-S08763936782011061000000) For information about signals on 5 cylinder engines, see «Signal specification»(ref-438318-S23639998362011120100000) See «Contents»(ref-438291-S00903409402011120100000) .

Is the evaporative emission system (EVAP) valve working?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking components and wiring»(ref-404045-S32741608652011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components
Ignition on.
Activate canister purge (CP) valve. A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S40500947052011061000000)

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.

Signal missing. Permanent fault

See Signal missing. Permanent fault

Checking for intermittent faults

Ignition on
Activate the evaporative emission system (EVAP) valve. A click should be heard when the evaporative emission system (EVAP) valve is activated.

Is the evaporative emission system (EVAP) valve working?

YES Refer to «Fault-tracing information»(ref-404045-S29213533772011061000000)
NO Refer to «Checking the connector»(ref-404045-S24594526562011061000000)

Scheme 387

Ignition off
Check the evaporative emission system (EVAP) valve connector. Check for contact resistance and oxidation
Reinstall components, reconnect connectors etc.
Ignition on
Activate the evaporative emission system (EVAP) valve. Check for a click from the canister purge (CP) valve. If the canister purge (CP) valve now functions, the cause of the fault was loose connections in the connector. Other information See «Checking wiring and terminals»(ref-438291-S01987812252011120100000)

Is the evaporative emission system (EVAP) valve working?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking the wiring and component»(ref-404045-S33481311392011061000000)

The control module has previously registered a fault. The fault is now no longer present.

Continue Refer to «Information»(ref-404045-S36854898042011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off
Reconnect the connectors, reinstall components etc.
Ignition on
Activate the evaporative emission system (EVAP) valve. A click should be heard when the evaporative emission system (EVAP) valve is activated.

Is the evaporative emission system (EVAP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S13600419912011061000000)

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.

Checking cables

Check signal cable between control module #A9 (#A9) and canister purge (CP) valve terminal 2 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
To access/replace the canister purge (CP) valve, see «Replacing the canister purge (CP) valve»(ref-403955-S02600930382011061000000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Scheme 388

Continue Refer to «Information»(ref-404045-S00827976122011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Signal too high. Intermittent fault

See Signal too high. Intermittent fault

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components
Ignition on.
Activate canister purge (CP) valve. A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S12127492852011061000000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components
Ignition on.
Activate canister purge (CP) valve. A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S22759863422011061000000)

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.

Signal too high. Permanent fault

See Signal too high. Permanent fault

Ignition on
Activate the evaporative emission system (EVAP) valve. A click should be heard when the evaporative emission system (EVAP) valve is activated.

Is the evaporative emission system (EVAP) valve working?

YES Refer to «Fault-tracing information»(ref-404045-S21087703762011061000000)
NO Refer to «Checking the wiring and component»(ref-404045-S42240920222011061000000)

Replacing the component

Ignition off. Try a new canister purge (CP) valve. Other information See «Location of components»(ref-403970-S02481495422011061000000)

Continue Refer to «Verification»(ref-404045-S00288654362011061000000)

The control module has previously registered a fault. The fault is now no longer present.

Continue Refer to «Information»(ref-404045-S34835118862011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off
Reconnect the connectors, reinstall components etc.
Ignition on
Activate the evaporative emission system (EVAP) valve. A click should be heard when the evaporative emission system (EVAP) valve is activated.

Is the evaporative emission system (EVAP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S06167394702011061000000)

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.

Check signal cable between control module #A9 (#A9) and canister purge (CP) valve terminal 2 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
To access/replace the canister purge (CP) valve, see «Replacing the canister purge (CP) valve»(ref-403955-S02600930382011061000000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Continue Refer to «Information»(ref-404045-S08248832472011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Signal too low. Intermittent fault

See Signal too low. Intermittent fault

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components
Ignition on.
Activate canister purge (CP) valve. A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S07085513702011061000000)

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.

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components
Ignition on.
Activate canister purge (CP) valve. A "click" should be heard when the canister purge (CP) valve is activated.

Is the canister purge (CP) valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S01037869212011061000000)

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.

Signal too low. Permanent fault

See Signal too low. Permanent fault

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

Checking the component

Slacken off the EVAP canister purge valve
Connect a vacuum pump to the EVAP canister purge valve terminal (B). Pump a vacuum. Check that there is no leakage through the EVAP canister purge valve by listening to and checking via the pump gauge that the pressure is stable
Connect the EVAP canister purge valve connector
Ignition on
Activate the evaporative emission system (EVAP) valve. When the EVAP canister purge valve is activated, the valve opens and clicks. Check on the pump gauge that the vacuum drops (the pressure evens out) when the EVAP valve opens. If the function is OK, there must be no leakage when the EVAP canister purge valve is closed (stable pressure on the pump gauge) and the vacuum must drop when the EVAP canister purge valve opens (the pressure evens out). The EVAP canister purge valve is defective if the function is faulty. If the function of the EVAP canister purge valve is OK, check: The hose and hose terminals between the EVAP canister purge valve and the intake manifold. Check for leakage and blockages The hose and hose terminals between the EVAP canister and the EVAP canister purge valve. Check for leakage and blockages. Remedy as necessary. Other information: For the location of components on 5 cylinder engines, see «Location of components»(ref-404036-S08763936782011061000000) To access or replace the hoses and/or EVAP canister, see «Carbon filter container, replacing»(ref-403972-S19737360192011061000000) .

Continue Refer to «Information»(ref-404045-S27418800872011061000000)

In case of this defect, troubleshooting is not followed by verification.

The information can be displayed again or the fault-tracing for this fault can be interrupted.

For C70, see «Carbon filter container, replacing»(ref-403955-S13465566912011061000000) .

Safety

First read Safety regulations for handling fuel .

Continue Refer to «Checking wiring and terminals»(ref-404045-S24287908262011061000000)

Checking the engine coolant temperature (ECT)

Note. The test cannot be started if the engine coolant temperature (ECT) is below 70 °C.

Start the engine
Read off the engine coolant temperature (ECT). If the engine coolant temperature (ECT) is below 70 °C, allow the engine to reach operating temperature or cancel the test.

Is the temperature above 70° C?

YES Refer to «Starting the test of the fuel tank system»(ref-404045-S16659075292011061000000)
NO FAULTRACING FAILED

Checking for blockage between the fuel tank pressure sensor and the fuel tank

HINT: If "small leak" is detected after a completed quick test of the fuel tank system, it may in certain cases be due to a blockage between the fuel tank pressure sensor and the fuel tank.

HINT: The method below is used to determine whether the detection of "small leak" after completed quick tests is caused by a blockage between the fuel tank pressure sensor and the fuel tank. It can be carried out by running the test with the fuel tank filler cap removed. Normally a "large leak" is detected with the fuel tank filler cap removed. If a "small leak" is detected with the fuel tank filler cap removed it indicates a blockage between the fuel tank pressure sensor and fuel tank.

Note. If the EVAP canister fills with the fuel vapor the test is interrupted. The EVAP canister fills with fuel vapor faster if the evaporative emission system (EVAP) valve is operating and the fuel tank filler cap is removed. Start the quick test directly after engine start and do not let the engine run at idle speed for longer than necessary.

Remove the fuel tank filler cap
Engine idling
Start the quick test with the fuel tank filler cap removed. In particular check the fuel tank pressure (red line) when the "large leak" test is running. If a "large leak" is detected with the fuel tank filler cap removed, the most likely cause is leakage. Continue fault-tracing according to "small leak". If the test is cancelled or "small leak" is detected with the fuel tank filler cap removed and the fuel tank pressure (red line) falls more slowly than normal during the test it may be due to a blockage in the hose or hose terminal between the tank and the fuel tank pressure sensor. This can be fault-traced by removing the hoses to the evaporative emission (EVAP) system components one at a time and carrying out a quick test between each operation. If a "large leak" is detected after the quick test when the hose has been disconnected the fault is in the direction of the airflow (calculated from the hose that has been disconnected). HINT: The direction of airflow during a quick test can be calculated from the fuel tank: fuel tank, evaporative emission system (EVAP) canister, evaporative emission system (EVAP) valve. The fuel tank pressure sensor measures the pressure in the hose between the fuel tank and the evaporative emission system (EVAP) canister. HINT: If the hose for the EVAP canister is detached from the fuel tank and a "large leak" is detected, there is a blockage in the tank hose terminal. Remedy as necessary. Reset all the components. Carry out a quick test of the tank system before the car is delivered to the customer. Select a suitable alternative to continue: Continue "small leak" fault-tracing Refer to «Small leak»(ref-404045-S03773016352011061000000) Finish. OKAY: Troubleshooting has been completed.

Scheme 389

Start the engine and let it run at idle speed.
Disconnect the hose between the canister purge (CP) valve and the EVAP canister from the canister purge (CP) valve.
Read off the canister purge (CP) valve. This is to check whether the valve is activated. Check that there is a vacuum in the canister purge (CP) valve when the valve is activated.

Is there a vacuum?

YES Refer to «Checking the vacuum at the EVAP canister»(ref-404045-S32868224262011061000000)
NO Refer to «Checking the canister purge (CP) valve vacuum»(ref-404045-S06792317682011061000000)

Scheme 390

Ignition off.
Reconnect the hose on the canister purge (CP) valve.
Disconnect the hose to the canister purge (CP) valve from the EVAP canister.
Start the engine and let it run at idle speed.
Read off the canister purge (CP) valve value. This is to determine whether the valve is activated or not. Check that there is a vacuum in the hose when the canister purge (CP) valve is activated.

Is there a vacuum?

YES Refer to «Checking the EVAP canister»(ref-404045-S13596511112011061000000)
NO Refer to «Checking the hose»(ref-404045-S07588018082011061000000)

Scheme 391

Connect the hose between the canister purge (CP) valve and the EVAP canister to the canister purge (CP) valve.
Start the engine and let it run at idle speed.
Disconnect the hose between the canister purge (CP) valve and the intake manifold from the canister purge (CP) valve. Check that there is a vacuum in the hose. Remedy as necessary.

Was a fault detected?

YES Refer to «Verification information»(ref-404045-S24314406222011061000000)
NO Refer to «Replacing the component»(ref-404045-S18204799082011061000000)

Try a new canister purge (CP) valve according to Replacing the canister purge (CP) valve .

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Checking the EVAP canister

Check that all EVAP canister inlets and outlets are not sealed.

HINT: Connect a vacuum pump to the EVAP canister terminals, one at a time. Check that it is not possible to pump negative pressure.

Other information

To access / replace the EVAP canister, see «Replacing the carbon filter container»(ref-403954-S14850981662011061000000) .

Was a fault detected?

YES Refer to «Verification information»(ref-404045-S24314406222011061000000)
NO Refer to «Checking the hose between the fuel tank and the EVAP canister»(ref-404045-S37610567312011061000000)

Checking the hose

Check if the hose between the canister purge (CP) valve and the EVAP canister is blocked or trapped.

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Checking the hose between the fuel tank and the EVAP canister

Check that the hose between the fuel tank and EVAP canister is airtight and is not trapped.

Remedy as necessary.

Was a fault detected?

YES Refer to «Verification information»(ref-404045-S24314406222011061000000)
NO Refer to «Test pressurization of the fuel tank system»(ref-404045-S29540295952011061000000)

Scheme 392

Scheme 393

Max 50 liters of fuel in the fuel tank.
Ignition off.
Connect the hose from the fuel tank to the EVAP canister.
Clamp the hose between the EVAP canister shut-off valve and the EVAP canister with a hose clip to seal it.
Carefully disconnect the EVAP canister hose from the canister purge (CP) valve. Connect manometer «9995646»(ref-403953-S17881977312011061000000) to the hose and the pressure regulator «9995544»(ref-403953-S05241159092011061000000) to the manometer. Set the pressure to 7 kPa (read off on manometer «9995646»(ref-403953-S17881977312011061000000) ). The cock must be at right angles to the hoses. WARNING: Max 10 kPa. Let the pressure build up for 5 minutes. Close the cock (the pressure may now drop by 1-2 kPa before it stabilizes). Read off the pressure. Turn the cock towards the EVAP canister hose. Wait for 10 minutes. WARNING: Never leave the car unattended with its fuel tank system pressurized. The pressure must be stable (it may rise a little due to fuel evaporation).

Is the pressure stable?

YES Refer to «Checking the fuel tank pressure sensor»(ref-404045-S41959280602011061000000)
NO Refer to «Checking the fuel tank system»(ref-404045-S09414897862011061000000)

Checking the fuel tank pressure sensor

Disconnect tool «9995646»(ref-403953-S17881977312011061000000) .
Connect the EVAP canister hose.
Remove the hose clamp from the hose between the canister purge (CP) valve and the intake manifold.
Start the engine and let it run at idle speed.
Read off the value for the fuel tank pressure and the canister purge (CP) valve. When the canister purge (CP) valve opens, the pressure in the fuel tank must drop.

Has the pressure in the fuel tank dropped?

YES Refer to «Checking the hose to the EVAP canister shut-off valve»(ref-404045-S12024561842011061000000)
NO Refer to «Checking the fuel tank pressure sensor hose»(ref-404045-S02172008432011061000000)

Checking the hose to the EVAP canister shut-off valve

Check the hose to the EVAP canister shut-off valve. Check the seal. Check the terminals.

Remedy as necessary.

Was a fault detected?

YES Refer to «Verification information»(ref-404045-S24314406222011061000000)
NO Refer to «Replacing the component»(ref-404045-S25405368672011061000000)

Checking the fuel tank pressure sensor hose

Ignition off.
Remove the fuel tank pressure sensor.
Remove the hose with the Y-nipple. Check that the nipple and hoses are not blocked. Remedy as necessary. Other information: To access / replace the fuel tank pressure sensor see «Replacing fuel tank pressure sensor»(ref-404033-S06568340492011061000000) .

Was a fault detected?

YES Refer to «Verification information»(ref-404045-S24314406222011061000000)
NO Refer to «Replacing the component»(ref-404045-S12060899302011061000000)

Try a new fuel tank pressure sensor according to Replacing fuel tank pressure sensor .

Scheme 394

Scheme 394: Replacing the component

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Try a new EVAP canister shut-off valve according to Replacing the shut-off valve for the carbon filter container .

Scheme 395

Scheme 395: Replacing the component

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Checking the fuel tank system

Ignition off.
Carefully pressurize the fuel tank system to 7 kPa. The cock must be at right angles to the hoses. NOTE: Max 10 kPa. Check the fuel tank system by spraying soapy water from the EVAP canister to the canister purge (CP) valve. Also spray the line between the fuel tank and the EVAP canister shut-off valve. Also check the filler pipe and the fuel tank filler cap. It may be necessary to lower the fuel tank in order to fault-trace hoses and connectors on top of the fuel tank. Remedy the leakage.

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Check the hose to the EVAP canister shut-off valve. Check the seal. Check the terminals.

Remedy as necessary.

Is the hose OK?

YES Refer to «Replacing the component»(ref-404045-S42787731252011061000000)
NO Refer to «Verification information»(ref-404045-S24314406222011061000000)

Try a new EVAP canister shut-off valve according to Replacing the EVAP canister shut-off valve .

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Ignition off.
Carefully pressurize the fuel tank system to 7 kPa. Turn the EVAP canister shut-off valve so that it is at a right angle to the hoses. WARNING: Max 10 kPa Check the fuel tank system by spraying it with soapy water from the EVAP canister to the canister purge (CP) valve. Also spray the line with the pressure regulator and roll-over valve to the fuel tank. Also check the filler pipe and the fuel tank filler cap. It may be necessary to lower the fuel tank in order to fault-trace hoses and connectors on top of the fuel tank. WARNING: Never leave the car unattended with its system pressurized.

Select "Continue" when the fault has been remedied.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Verification information

HINT: After carrying out the check and the repair, check that the fault has been remedied.

Press continue for verification.

Continue Refer to «Starting the test of the fuel tank system»(ref-404045-S16659075292011061000000)

Checking the vacuum downstream of the canister purge (CP) valve

Disconnect the hose between the canister purge (CP) valve and the EVAP canister from the canister purge (CP) valve.
Start the engine and let it run at idle speed Read off the canister purge (CP) valve pulse signal. There should not be a vacuum in the canister purge (CP) valve when the pulse signal is 0%. Other information To access / replace the canister purge (CP) valve, see «Replacing the canister purge (CP) valve»(ref-403955-S02600930382011061000000) .

Is the canister purge (CP) valve OK?

YES Refer to «Checking the canister purge (CP) valve»(ref-404045-S40500481102011061000000)
NO Refer to «Verification information»(ref-404045-S24314406222011061000000)

Checking the canister purge (CP) valve

Check the canister purge (CP) valve connector for dirt, damage and deposits.

Activate the canister purge (CP) valve to ensure that no function faults occur.

Check that the canister purge (CP) valve does not jam or stop functioning after it has been activated.

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Open the fuel tank filler cap.
Start the engine and let it run at idle speed. Read off the fuel tank pressure. HINT: The fuel tank pressure must be higher than -10 hPa. The normal value is close to 0 hPa.

Is the fuel tank pressure OK?

YES Refer to «Checking the canister purge (CP) valve»(ref-404045-S24110140732011061000000)
NO Refer to «Verification information»(ref-404045-S24314406222011061000000)

Disconnect the hose between the canister purge (CP) valve and the EVAP canister from the canister purge (CP) valve.
Start the engine and let it run at idle speed. Read off the canister purge (CP) valve pulse signal. There should not be a vacuum in the canister purge (CP) valve when the pulse signal is 0%. Other information To access / replace the canister purge (CP) valve, see «Replacing the canister purge (CP) valve»(ref-403955-S02600930382011061000000) .

Is the value correct?

YES Refer to «Checking hoses»(ref-404045-S26397142112011061000000)
NO Refer to «Verification information»(ref-404045-S24314406222011061000000)

Checking hoses

Check that the EVAP canister shut-off valve is not sealed.

Check that the EVAP canister shut-off valve filter is not sealed.

Check the hoses between the EVAP canister and the EVAP canister shut-off valve and between the EVAP canister shut-off valve and its filter for blockages and crimping.

Check the EVAP canister shut-off valve terminal in the EVAP canister for blockage.

Remedy as necessary.

To access / replace the EVAP canister shut-off valve see «Replacing the shut-off valve for the carbon filter container»(ref-438318-S21401000472011120100000) .

Continue Refer to «Verification information»(ref-404045-S24314406222011061000000)

Checking software

HINT: For vehicles of model year 2003-2005, the software in engine control module (ECM) should be checked before fault tracing of the fault relating to the leak from the tank system is carried out.

Scheme 396

Scheme 396: Checking software

Ignition on. Click on the VCT2000 symbol to start the read out and check the software version in the Engine control module (ECM). NOTE: More instructions follow together with the read out.

Has the latest software been downloaded to the control module?

YES Refer to «Perform quick-test tank system»(ref-404045-S05206093932011061000000)
NO ANOTHER TEST

Scheme 397

Activate the test by pressing on the symbol for VCT2000.
Read off initial parameters and check them according to start conditions for performing the test.
Press the button "Start" to start the quick-test.
Check that the test has started. Parameters run status shall go to "In progress" and the test phase shall go to "Reference". NOTE: If the test does not start, check that the start conditions are fulfilled. When the reference phase is finished, check of the tank system starts. The pressure in the tank starts to increase, see graph. Within 15 minutes the Engine control module (ECM) makes a decision as to whether there is leakage in the tank system or not. The test is finished.
Check parameters for test result and follow relevant instructions below. NOTE: Estimated leakage shall be used to get an idea of the proximity to the diagnostic trouble code limit. If the estimated leakage is very near the diagnostic trouble code limit, troubleshooting should probably be performed despite the Tank system, test result shows "No leakage found", especially if diagnostic trouble code for leakage has been stored earlier. NOTE: Use diagnostic trouble code counter to see the frequency of the problem. Also use frozen values to get an idea if external conditions may have affected the result. Compare with current conditions in the workshop. Conditions for starting the quick test of the fuel tank system No DTCs related to EVAP purge valve or ambient air pressure sensor set. Battery voltage 11-15 V. Atmospheric pressure higher than 750 hPa, appr. 2500 m (8200 ft). Fuel level 0-85 %. Ambient air temperature 4-35 °C (39-95 °F). NOTE: The battery voltage must be correct throughout the entire test. The test can take up to 15 minutes, depending on the quantity of fuel in the fuel tank. It is highly recommended to use the constant voltage charger, Midtronics PSC-550, during the test. Other information See «Description of parameters, quick test of the fuel tank system»(ref-403972-S36475179812011061000000) See «Test phases, quick test fuel tank system»(ref-438325-S09369594172011120100000) For information on leakage diagnosis, see «Leak diagnostics (certain markets only)»(ref-404046-S22045042972011061000000) . See «Fuel tank system, check»(ref-403958-S36969650912011061000000) See «Test pressurizing the tank system»(ref-438325-S08105011132011120100000) Select alternative according to relevant test results: DMTL, test result = "Problem found" Refer to «DMTL, test result = "Problem found"»(ref-404045-S10564333012011061000000) Tank system, test result = "No leakage found" Refer to «Tank system, test result = "No leakage found"»(ref-404045-S35943407042011061000000) Tank system, test result = "Minor leakage found" Refer to «Tank system, test result = "Minor leakage found"»(ref-404045-S21620700412011061000000) Tank system, test result = "Major leakage found" Refer to «Tank system, test result = "Major leakage found"»(ref-404045-S23068350482011061000000) DMTL, test result and Tank system, test result = "Unknown" Refer to «DMTL, test result and Tank system, test result = "Unknown"»(ref-404045-S10594500112011061000000) Cancel fault-tracing. FAULT NOT FOUND: Troubleshooting has been completed.

Checking for intermittent fault

Ignition on.
Activate EVAP canister shut-off valve. A "click" should be heard when the EVAP canister shut-off valve is activated.

Is the EVAP canister shut-off valve working?

YES Refer to «Fault-tracing information»(ref-404045-S12542418262011061000000)
NO Refer to «Checking connector (resistance)»(ref-404045-S08672320672011061000000)

Checking connector (resistance)

Ignition off. Check EVAP canister shut-off valve connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .

Continue Refer to «Checking connector (activating EVAP canister shut-off valve)»(ref-404045-S16169594522011061000000)

Checking connector (activating EVAP canister shut-off valve)

Reinstall components, reconnect connectors etc.
Ignition on. Activate EVAP canister shut-off valve. Check if a "click" is heard from the EVAP canister shut-off valve. If the EVAP canister shut-off valve now functions it means that the cause of the fault has been loose connections in the connector.

Is the EVAP canister shut-off valve working?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking wiring and components»(ref-404045-S30836689672011061000000)

Replacing component

Try a new EVAP canister shut-off valve according to Replacing the shut-off valve for the carbon filter container .

Continue Refer to «Verification»(ref-404045-S16670228432011061000000)

Control module previously registered a fault. The fault is now no longer present.

Continue Refer to «Information»(ref-404045-S37376140132011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Ignition on.
Activate EVAP canister shut-off valve. A "click" should be heard when the EVAP canister shut-off valve is activated.

Is the EVAP canister shut-off valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S29812944092011061000000)

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.

Check EVAP canister shut-off valve connector for contact resistance and oxidation according to Contact resistance and oxidation and loose connections according to Loose connections (terminals)

Check signal cable between control module #B40 (#B50) and 2 and power supply between system relay terminal 3 and EVAP canister shut-off valve terminal 1 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
To access/replace the EVAP canister shut-off valve see «Replacing EVAP canister shut-off valve»(ref-438318-S41370084612011120100000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Scheme 398

Continue Refer to «Information»(ref-404045-S11997710132011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal missing. Intermittent fault

Checking connector

Ignition off
Check EVAP canister shut-off valve connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) .
Reinstall components, reconnect connectors etc.
Ignition on.
Activate EVAP canister shut-off valve. A "click" should be heard when the EVAP canister shut-off valve is activated. If the EVAP canister shut-off valve is now OK this indicates that the fault was caused by poor contact in the connector. Other information To access/replace the EVAP canister shut-off valve see «Replacing EVAP canister shut-off valve»(ref-438318-S41370084612011120100000) . For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Is the EVAP canister shut-off valve working?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking wiring and components»(ref-404045-S20245177722011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Ignition on.
Activate EVAP canister shut-off valve. A "click" should be heard when the EVAP canister shut-off valve is activated.

Is the EVAP canister shut-off valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S09267086092011061000000)

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.

See Signal missing. Permanent fault

Check signal cable between control module #B40 (#B50) and EVAP canister shut-off valve terminal 2 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
To access/replace the EVAP canister shut-off valve see «Replacing EVAP canister shut-off valve»(ref-438318-S41370084612011120100000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Continue Refer to «Information»(ref-404045-S25784577392011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal too high. Intermittent fault

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Ignition on.
Activate EVAP canister shut-off valve. A "click" should be heard when the EVAP canister shut-off valve is activated.

Is the EVAP canister shut-off valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S09641386332011061000000)

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.

See Signal too high. Permanent fault

Check signal cable between control module #B40 (#B50) and EVAP canister shut-off valve terminal 2 for an intermittent short-circuit to ground according to Short-circuit to ground, permanent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
To access/replace the EVAP canister shut-off valve see «Replacing EVAP canister shut-off valve»(ref-438318-S41370084612011120100000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Continue Refer to «Information»(ref-404045-S30140248342011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal too low. Intermittent fault

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Ignition on.
Activate EVAP canister shut-off valve. A "click" should be heard when the EVAP canister shut-off valve is activated.

Is the EVAP canister shut-off valve working?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S32648478532011061000000)

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.

See Signal too low. Permanent fault

Checking the status

Ignition on. Activate the valve in the leak diagnostic unit to check whether the fault is permanent or intermittent. The valve clicks when it is activated. The fault is permanent if the valve does not activate. The fault is intermittent if the valve activates.

Continue Refer to «Checking components and wiring»(ref-404045-S10971116282011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition on
Activate the valve in the leak diagnostic unit. The valve should click. Check that the function is OK.

Is the function OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S16166250402011061000000)

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.

Ignition on. Activate the valve in the leak diagnostic unit to check whether the fault is permanent or intermittent. The valve clicks when it is activated. The fault is permanent if the valve does not activate. The fault is intermittent if the valve activates.

Continue Refer to «Checking components and wiring»(ref-404045-S36106306512011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition on
Activate the valve in the leak diagnostic unit. The valve should click. Check that the function is OK.

Is the function OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S28198248822011061000000)

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.

Ignition on. Activate the valve in the leak diagnostic unit to check whether the fault is permanent or intermittent. The valve clicks when it is activated. The fault is permanent if the valve does not activate. The fault is intermittent if the valve activates.

Continue Refer to «Checking the wiring»(ref-404045-S19129586772011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition on
Activate the valve in the leak diagnostic unit. The valve should click. Check that the function is OK.

Is the function OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S27348870242011061000000)

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.

Check that the hose between the EVAP canister and EVAP canister shut-off valve is not blocked or pinched.

Check that the EVAP canister connector to the EVAP canister shut-off valve is not blocked.

Check EVAP canister shut-off valve and filter for dirt and deposits.

Try to activate the canister shut off valve to ensure that no malfunctions occur.

Continue Refer to «Information»(ref-404045-S09908427472011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Checking fuel tank pressure sensor

Open the fuel tank filler cap.
Start the engine and let it idle. Read off fuel tank pressure HINT: Fuel tank pressure must be higher than -1000 Pa. The normal value is approximately 0 Pa.

Is the fuel tank pressure OK?

YES Refer to «Checking canister purge (CP) valve»(ref-404045-S34704733712011061000000)
NO Refer to «Verification»(ref-404045-S32126244872011061000000)

Checking canister purge (CP) valve

Disconnect hose between canister purge (CP) valve and EVAP canister from the canister purge (CP) valve.
Start the engine and let it idle. Read off canister purge (CP) valve pulse signal. There should not be vacuum in the canister purge (CP) valve when the pulse signal is 0%. Other information Location of components see «Component location, B52X4 T»(ref-403970-S07792440002011061000000) . To access/replace the canister purge (CP) valve, see «Replacing the canister purge (CP) valve»(ref-403955-S02600930382011061000000) .

Is the value correct?

YES Refer to «Checking hoses»(ref-404045-S13794464272011061000000)
NO Refer to «Verification»(ref-404045-S32126244872011061000000)

Check that EVAP canister shut-off valve is not blocked.

Check that EVAP canister shut-off valve filter is not blocked.

Check hose between EVAP canister and EVAP canister shut-off valve and hose between EVAP canister shut-off valve and filter for blockage or restriction.

Check EVAP canister shut-off valve terminal in EVAP canister for blockage.

Remedy as necessary.

Continue Refer to «Verification»(ref-404045-S32126244872011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Start the engine. Activate the quick fuel tank system test.

Is the value OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S00984450502011061000000)

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.

Check the fuel tank pressure sensor connector for contact resistance and oxidation according to Contact resistance and oxidation . Check for damage carefully.

Other information

For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Scheme 399

Continue Refer to «Information»(ref-404045-S16700572862011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Faulty signal. Intermittent fault

See Faulty signal. Intermittent fault

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Start the engine. Read off fuel tank pressure. The fuel tank pressure should be approximately 0 hPa (0 psi) when the fuel tank filler cap is open.

Is the fuel tank pressure OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S22803379832011061000000)

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.

See Faulty signal, permanent fault

Engine control module (ECM)

Reading off the status of the diagnostic trouble code (DTC)

Note. When reading off the DTC status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

Start the engine. Let it idle for at least 15 seconds.
Read off the diagnostic trouble code (DTC) status. Check the status of the relevant diagnostic trouble code (DTC).

Was the status of the relevant diagnostic trouble code (DTC) permanent?

YES Refer to «Checking the wiring and component»(ref-404045-S05100740422011061000000)
NO Refer to «Signal too high. Intermittent fault»(ref-404045-S07392345892011061000000)

Check fuel tank pressure sensor connector for contact resistance and oxidation according to Contact resistance and oxidation .

Check signal cable between engine control module (ECM) connector #B31 (#B41) and fuel tank pressure sensor connector #2 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults and for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check signal cable between engine control module (ECM) control module #B4 (#B14) and fuel tank pressure sensor connector #1 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults and for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check signal cable between engine control module (ECM) connector #B10 (#B20) and accelerator pedal (AP) position sensor #3 for an intermittent open circuit according to Open-circuit, intermittent faults .

Other information

For connection of engine control module (ECM) breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000) .
To access/replace the fuel tank pressure sensor see «Fuel tank, replacing»(ref-404033-S28813935662011061000000) .
Voltage supply for the fuel tank pressure sensor #3 is approximately 5 V. #1 is ground terminal and #2 is signal.
For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

Continue Refer to «Information»(ref-404045-S35550745302011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reinstall connectors, components etc.
Read off fuel tank pressure.
Start the engine and let it idle.
Activate the EVAP canister shut-off valve and allow it to open. Activate canister purge (CP) valve. Open and shut the valve. Read off the fuel tank pressure and check if the values have changed. HINT: When the canister purge (CP) valve is open the pressure in the fuel tank drops. NOTE: If the EVAP canister is full the engine may stop when canister purge (CP) valve activation occurs because of the extra fuel supply.

Does the fuel tank pressure change?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S10855872892011061000000)

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.

Signal too high

See Signal too high

Check fuel tank pressure sensor connector for contact resistance and oxidation according to Contact resistance and oxidation and loose connections according to Loose connections (terminals) . Check particularly for any damage.

Check ground lead between control module #B4 (#B14) and fuel tank pressure sensor connector #1 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check signal cable between control module #B31 (#B41) and fuel tank pressure sensor connector #2 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check power supply cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for an intermittent open-circuit according to Open-circuit, intermittent faults .

Check signal cable between control module #B31 (#B41) and fuel tank pressure sensor connector #2 for an intermittent short-circuit to supply voltage according to Short-circuit to supply voltage, intermittent faults .

HINT: Use a test screwdriver with at least a 3 W bulb to determine if the cable is short-circuited to supply voltage.

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Continue Refer to «Information»(ref-404045-S29517065832011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Check fuel tank pressure sensor connector for contact resistance and oxidation according to Contact resistance and oxidation .

Other information

For connection of engine control module (ECM) breakout box, see «Connecting the breakout box»(ref-403956-S00897666572011061000000) .
To access/replace the fuel tank pressure sensor see «Fuel tank, replacing»(ref-404033-S28813935662011061000000) .
Voltage supply for the fuel tank pressure sensor #3 is approximately 5 V. #1 is ground terminal and #2 is signal.
For information about signals, see «Signal specification»(ref-403973-S19941283772011061000000) .

Continue Refer to «Information»(ref-404045-S36962498742011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal too high. Intermittent fault

Ignition off
Check the fuel tank pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) . Also check for loose connections according to «Loose connections (terminals)»(ref-403956-S28513979592011061000000) . Check for damage carefully.
Assemble the connector
Start the engine Read off the fuel tank pressure. The fuel tank pressure should be approximately 0 hPa when the fuel tank filler cap is open Other information For specifications see «Component specifications»(ref-403971-S01187285952011061000000) . For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Is the fuel tank pressure OK?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking the connector»(ref-404045-S03329016622011061000000)

Check the ground lead between control module terminal B4 (#B14) and fuel tank pressure sensor connector terminal 1. Check the ground lead between control module terminal B31 (#B41) and fuel tank pressure sensor connector terminal 2 for an open-circuit according to Open-circuit, permanent faults .

Check the power supply cable between control module terminal B10 (#B20) and fuel tank pressure sensor connector terminal 3 for an open-circuit according to Open-circuit, permanent faults .

Check the signal cable between control module terminal B31 (#B41) and fuel tank pressure sensor connector terminal 2 for a short-circuit to supply voltage according to Short-circuit to supply voltage. Permanent faults .

HINT: Use a test screwdriver with at least a 3 W bulb to determine if the cable is short-circuited to supply voltage

Other information

Connecting the breakout box / accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Continue Refer to «Verification»(ref-404045-S29655801142011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Start the engine. Read off fuel tank pressure. The fuel tank pressure should be approximately 0 hPa (0 psi) when the fuel tank filler cap is open.

Is the fuel tank pressure OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S11496134222011061000000)

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.

See Signal too high. Permanent fault

Reading off the status of the diagnostic trouble code (DTC)

Note. When reading off the DTC status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

Start the engine. Let it idle for at least 15 seconds.
Read off the diagnostic trouble code (DTC) status. Check the status of the relevant diagnostic trouble code (DTC).

Was the status of the relevant diagnostic trouble code (DTC) permanent?

YES Refer to «Checking the wiring and component»(ref-404045-S09345073222011061000000)
NO Refer to «Signal too low. Intermittent fault»(ref-404045-S01297670992011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reinstall connectors, components etc.
Read off fuel tank pressure.
Start the engine and let it idle.
Activate the EVAP canister shut-off valve and allow it to open. Activate canister purge (CP) valve. Open and shut the valve. Read off the fuel tank pressure and check if the values have changed. HINT: When the canister purge (CP) valve is open the pressure in the fuel tank drops. NOTE: If the EVAP canister is full the engine may stop when canister purge (CP) valve activation occurs because of the extra fuel supply.

Does the fuel tank pressure change?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S12121105862011061000000)

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.

Reading off the status of the diagnostic trouble code (DTC)

Note. When reading off the DTC status, other stored diagnostic trouble codes (DTCs) and their status will also be listed.

Start the engine. Let it idle for at least 15 seconds.
Read off the diagnostic trouble code (DTC) status. Check the status of the relevant diagnostic trouble code (DTC).

Was the status of the relevant diagnostic trouble code (DTC) permanent?

YES Refer to «Checking the wiring and component»(ref-404045-S12837395872011061000000)
NO Refer to «Signal too low. Intermittent fault»(ref-404045-S19910476852011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reinstall connectors, components etc.
Read off fuel tank pressure.
Start the engine and let it idle.
Activate the EVAP canister shut-off valve and allow it to open. Activate canister purge (CP) valve. Open and shut the valve. Read off the fuel tank pressure and check if the values have changed. HINT: When the canister purge (CP) valve is open the pressure in the fuel tank drops. NOTE: If the EVAP canister is full the engine may stop when canister purge (CP) valve activation occurs because of the extra fuel supply.

Does the fuel tank pressure change?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S35641447962011061000000)

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.

Check signal cable between control module #B31 (#B41) and fuel tank pressure sensor connector #2 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Check power supply cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for an intermittent short-circuit to ground according to Short-circuit to ground, intermittent faults .

Other information

Connecting the breakout box/accessing the control module, see «Connecting the breakout box»(ref-403956-S37247582692011061000000) .
For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Continue Refer to «Information»(ref-404045-S03532427782011061000000)

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

If the fault is intermittent, do not verify fault-tracing if the fault does not recur.

It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

See Signal too low. Intermittent fault

Ignition off
Check the fuel tank pressure sensor connector for contact resistance and oxidation according to «Contact resistance and oxidation»(ref-403956-S41958999262011061000000) . Also check for loose connections according to «Loose connections (terminals)»(ref-403956-S28513979592011061000000) . Check for damage carefully.
Assemble the connector
Start the engine Read off the fuel tank pressure. The fuel tank pressure should be approximately 0 hPa when the fuel tank filler cap is open Other information For specifications see «Component specifications»(ref-403971-S01187285952011061000000) . For information about signals, see «Signal specification»(ref-403971-S16906518782011061000000) .

Is the fuel tank pressure OK?

YES OKAY: Troubleshooting has been completed.
NO Refer to «Checking the wiring»(ref-404045-S32563922472011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reconnect connectors, reinstall components.
Start the engine. Read off fuel tank pressure. The fuel tank pressure should be approximately 0 hPa (0 psi) when the fuel tank filler cap is open.

Is the fuel tank pressure OK?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S27014918402011061000000)

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.

See Signal too low. Permanent fault

Fault-tracing is not followed by verification for this fault.

HINT: After the diagnostic trouble codes (DTCs) are erased, the function of the leak diagnostic unit can be checked by running a quick test of the fuel tank system in the vehicle communication socket. If there is a fault, the fault status will be "FAULT FOUND" on the leak diagnostic unit.

The information can be displayed again or fault-tracing this fault can be interrupted.

Fault-tracing is not followed by verification for this fault.

The information can be displayed again or fault-tracing this fault can be interrupted.

Fault-tracing is not followed by verification for this fault.

The information can be displayed again or fault-tracing this fault can be interrupted.

Checking component

Check that the fuel tank filler cap is correctly installed and check the sealing ring.
Ignition on.
Read off fuel tank pressure.
Start the engine and let it idle. Activate canister purge (CP) valve. Open and shut the valve. Read off the fuel tank pressure and check if the values have changed. HINT: When the canister purge (CP) valve is open the pressure in the fuel tank drops. Other information: To access/replace the fuel tank pressure sensor see «Fuel tank, replacing»(ref-404033-S28813935662011061000000) . Fuel tank pressure is measured relative to atmospheric pressure. Maximum pressure is approximately 42 hPa and minimum pressure is approx -21 hPa. Fuel tank pressure is measured relative to atmospheric pressure. Maximum pressure is approximately 42 hPa (0.60 psi) and minimum pressure is approx -21 hPa (0.30 psi).

Does the fuel tank pressure change?

YES Refer to «Information»(ref-404045-S02382259212011061000000)
NO Refer to «Checking for leakage»(ref-404045-S33354012212011061000000)

Checking for leakage

Check the hoses and components in the evaporative emission (EVAP) system for leakage according to Check for air leaks in the intake system .

Remedy as necessary.

Other information

To access/replace the fuel tank pressure sensor see «Fuel tank, replacing»(ref-404033-S28813935662011061000000) .

Continue Refer to «Verification»(ref-404045-S01735956482011061000000)

HINT: After carrying out the repair, check that the fault has been remedied.

Ignition off.
Reinstall connectors, components etc.
Read off fuel tank pressure.
Start the engine and let it idle.
Activate the EVAP canister shut-off valve and allow it to open. Activate canister purge (CP) valve. Open and shut the valve. Read off the fuel tank pressure and check if the values have changed. HINT: When the canister purge (CP) valve is open the pressure in the fuel tank drops. NOTE: If the EVAP canister is full the engine can stop when canister purge (CP) valve activation occurs because of the extra fuel supply.

Does the fuel tank pressure change?

YES VERIFIED: Troubleshooting has been completed.
NO Refer to «Information»(ref-404045-S37354391862011061000000)