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Home >> Volvo >> 2002 >> V70 T5 L5-2.3L Turbo VIN 53 B5234T3 >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> ECM Codes (Engine Control Module) >> ECM-431D >> Signal Too High >> Part 2

Part 2






Signal too high (Continued)

Checking the EVAP canister purge valve

Hint: Leakage through the EVAP canister purge valve can be checked by blocking the hose between the EVAP canister and the purge valve and then running the quick test of the fuel tank system. If leakage was detected in a previous quick test of the fuel tank system but is not now detected when the hose between the EVAP canister and the purge valve is blocked, the leakage may be through the EVAP canister purge valve.

- Disconnect the hose between the EVAP canister purge valve and the EVAP canister from the connection to the EVAP canister purge valve. Block the hose while running the quick test of the fuel tank system.

Other information:
- For the location of components on 5 cylinder engines, see Location of components Locations
- For the location of components on 6 cylinder engines, see Location of components Locations.





Press "Continue" to carry out the quick test of the fuel tank system

Continue - Activating the quick test of the fuel tank system

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Activating the quick test of the fuel tank system

Hint: If no leakage was detected when running the quick test of the fuel tank system when the hose between the EVAP canister and the purge valve is blocked, the leakage may be through the EVAP canister purge valve.

- Switch off the ignition to ensure that the status of the quick test for the fuel tank system is "NOT COMPLETED". The test cannot be started if the status is "COMPLETED"
- Ignition on
- Activate the quick test of the fuel tank system
- Read off the battery voltage, the status of the quick test of the fuel tank system and the status of the test phase. Check the parameters according to the conditions for starting the quick test of the fuel tank system.

Note! The following conditions must be met in order for the quick test of the fuel tank system to be run correctly.
Conditions for starting the quick test of the fuel tank system
- Diagnostic trouble codes (DTC) ECM-4000, ECM-4007, ECM-4010, or ECM-4024 are not stored
- Engine off, ignition on
- The battery voltage must be 11-14 V
- The status of the test phase must be "NOT RUNNING".
- The status of the quick test for the fuel tank system must be "NOT COMPLETED".

Note! The battery voltage must be correct throughout the entire test. The test can take up to 10 minutes, depending on the quantity of fuel in the fuel tank. Connect a battery charger if necessary.

- Active the quick test for the fuel tank system by clicking the start button. Click the stop button to cancel the test.
Check that the quick test has started by reading off the status of the test phase. The test has started when the status of the test phase is "REFERENCE 1".
Wait until the test is complete. When the test is completed, the status of the test phase must be "NOT RUNNING" and the status of the quick test for the fuel tank system must be "COMPLETED".
If no faults are detected after the quick test of the fuel tank system, the test result for the leak diagnostic module and the fuel tank system will be "NO FAULT FOUND".
If a fault is detected after the quick test of the fuel tank system is complete, the test result for the fuel tank system or leak diagnostic unit will be "FAULT FOUND" with the fault type, depending on the fault.

Other information
- For further information about leak diagnostics, see Leak diagnostics (certain markets only) Leak Diagnostics (Certain Markets Only)
- For further information about leak diagnostic parameters, see Description of parameters, quick test of the fuel tank system Description of Parameters, Quick Test of the Fuel Tank System
- For information about test phases, see Test phases Test Phases.

Select an alternative to continue when the test is completed:
1. The test result for the fuel tank system and leak diagnostic unit is "OK, NO FAULT FOUND".
2. The test result for the fuel tank system is "FAULT FOUND, MAJOR LEAK" or "FAULT FOUND, MINOR LEAK".
3. The quick test does not start or the test result for the leak diagnostic unit is "FAULT FOUND" (and the fault type).





1 - Replacing the component

2 - Checking the fuel tank system

3 - Fault-tracing information:

------------------------

Replacing the component
- Try a new EVAP canister purge valve. See Location of components, engine compartment Locations.






Continue - Verification

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Checking the fuel tank system

Warning! First read Safety regulations for handling fuel Safety Regulations for Handling Fuel

Hint: The fault may be due to leakage in the fuel tank, fuel filler pipe, fuel tank filler cap, evaporative emission (EVAP) canister, EVAP canister purge valve, leak diagnostic unit or in the hoses between these components.

- Ignition off
- Pressurize the tank system to locate any leaks. See Test pressurizing the tank system Testing and Inspection.
When the fuel tank system is pressurized:
Check the fuel tank system for leakage by spraying soap solution on the components for the fuel tank system, such as the tank, fuel filler pipe, fuel tank filler cap, EVAP canister purge valve, EVAP canister and the hoses and hose terminals between these components.
Remedy as necessary.
Reinstall components, hoses etc.
If no leakage can be found in the fuel tank system after the above checks and corrective action but the fault remains after the quick test, the leak diagnostic unit may be defective.
Run a quick test of the fuel tank system after the above checks and corrective action to check if the fault is still present.

Other information:
- To lower the tank, see Fuel tank, replacing.

Press "Continue" to carry out the quick test of the fuel tank system.

Continue - Activating the quick test of the fuel tank system

------------------------

Activating the quick test of the fuel tank system
- Switch off the ignition to ensure that the status of the quick test for the fuel tank system is "NOT COMPLETED". The test cannot be started if the status is "COMPLETED"
- Ignition on
- Activate the quick test of the fuel tank system
- Read off the battery voltage, the status of the quick test of the fuel tank system and the status of the test phase. Check the parameters according to the conditions for starting the quick test of the fuel tank system.

Note! The following conditions must be met in order for the quick test of the fuel tank system to be run correctly.
Conditions for starting the quick test of the fuel tank system
- Diagnostic trouble code (DTC) ECM-4000, ECM-4007, ECM-4010, or ECM-4024 is not stored
- Engine off, ignition on
- The battery voltage must be 11-14 V
- The status of the test phase must be "NOT RUNNING".
- The status of the quick test for the fuel tank system must be "NOT COMPLETED".

Note! The battery voltage must be correct throughout the entire test. The test can take up to 10 minutes, depending on the quantity of fuel in the fuel tank. Connect a battery charger if necessary.

- Active the quick test for the fuel tank system by clicking the start button. Click the stop button to cancel the test.
Check that the quick test has started by reading off the status of the test phase. The test has started when the status of the test phase is "REFERENCE 1".
Wait until the test is complete. When the test is completed, the status of the test phase must be "NOT RUNNING" and the status of the quick test for the fuel tank system must be "COMPLETED".
If no faults are detected after the quick test of the fuel tank system, the test result for the leak diagnostic module and the fuel tank system will be "NO FAULT FOUND"
If a fault is detected after the quick test of the fuel tank system is complete, the test result for the fuel tank system or leak diagnostic unit will be "FAULT FOUND" with the fault type, depending on the fault.

Hint: If the test result is "FAULT FOUND" and the fault type is displayed after the completed test, a diagnostic trouble code (DTC) for the fault will be stored in the control module.

Other information
- For further information about leak diagnostics, see Leak diagnostics (certain markets only) Leak Diagnostics (Certain Markets Only)
- For further information about leak diagnostic parameters, see Description of parameters, quick test of the fuel tank system Description of Parameters, Quick Test of the Fuel Tank System
- For information about test phases, see Test phases Test Phases.

Select an alternative to continue when the test is completed:
1. The test result for the fuel tank system and leak diagnostic unit is "OK, NO FAULT FOUND"
2. The test result for the fuel tank system is "FAULT FOUND, MAJOR LEAK" or "FAULT FOUND, MINOR LEAK"
3. The quick test does not start or the test result for the leak diagnostic unit is "FAULT FOUND" (and the fault type).





1 - Fault Found

2 - Replacing the component

3 - Fault-tracing information:

------------------------

Replacing the component




- Ignition off.
- Try a new leak diagnostic unit. See Leak diagnostic pump, replacing Service and Repair.






Continue - Verification

------------------------

Fault-tracing information:
- The control module cannot run the leak diagnostic when the quick test of the fuel tank system is activated. This may be because the conditions for starting the quick test of the fuel tank system have not been met, that the fault occurred during fault-tracing or that the fault existed before the fault-tracing began. Check that all conditions for starting the quick test of the fuel tank system are met and that all hoses, connectors, components etc are correctly reinstalled and undamaged
- The quick test for the fuel tank system cannot be run if the battery voltage varies too much. The voltage may vary if the battery is being charged with a battery charger. Charge the battery before beginning the quick test to avoid voltage variations.

Hint: Cancel fault-tracing for this fault. Then read off diagnostic trouble codes (DTCs) from the vehicle communication socket. Fault trace any other diagnostic trouble codes (DTCs) stored in the control module.

- Remedy as necessary.

Select a suitable alternative to continue:
1. Start this fault-tracing from the beginning again
2. Cancel fault-tracing for this fault.

1 - Checking other diagnostic trouble codes (DTCs)

2 - No Fault Found

------------------------

Intermittent fault
The control module has previously detected a leak in the tank system but the fault is no longer active. The fault may be due to leakage in the fuel tank, fuel filler pipe, fuel tank filler cap, evaporative emission system (EVAP) canister, EVAP canister purge valve, leak diagnostic unit or in the hoses between these components.

Other information:
- To check the fuel tank system for leakage, see Test pressurizing the tank system Testing and Inspection
- For the location of components on 5 cylinder engines, see Location of components Locations
- For the location of components on 6 cylinder engines, see Location of components Locations
- To replace the leak diagnostic unit, see Leak diagnostic pump, replacing Service and Repair.

Press "Continue" to carry out the quick test of the fuel tank system.

Continue - Verification

------------------------

Verification




Verification

Verification

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




- Switch off the ignition to ensure that the status of the quick test for the fuel tank system is "NOT COMPLETED". The test cannot be started if the status is "COMPLETED"
- Ignition on
- Activate the quick test of the fuel tank system
- Read off the battery voltage, the status of the quick test of the fuel tank system and the status of the test phase. Check the parameters according to the conditions for starting the quick test of the fuel tank system.

Note! The following conditions must be met in order for the quick test of the fuel tank system to be run correctly.
Conditions for starting the quick test of the fuel tank system
1. Diagnostic trouble code (DTC) ECM-4000, ECM-4007, ECM-4010, or ECM-4024 is not stored
2. Engine off, ignition on
3. The battery voltage must be 11-14 V
4. The status of the test phase must be "NOT RUNNING".
5. The status of the quick test for the fuel tank system must be "NOT COMPLETED".

Note! The battery voltage must be correct throughout the entire test. The test can take up to 10 minutes, depending on the quantity of fuel in the fuel tank. Connect a battery charger if necessary.

- Active the quick test for the fuel tank system by clicking the start button. Click the stop button to cancel the test.
Check that the quick test has started by reading off the status of the test phase. The test has started when the status of the test phase is "REFERENCE 1".
Wait until the test is complete. When the test is completed, the status of the test phase must be "NOT RUNNING" and the status of the quick test for the fuel tank system must be "COMPLETED".
If no faults are detected after the quick test of the fuel tank system, the test result for the leak diagnostic module and the fuel tank system will be "NO FAULT FOUND"
If a fault is detected after the quick test of the fuel tank system is complete, the test result for the fuel tank system or leak diagnostic unit will be "FAULT FOUND" with the fault type, depending on the fault.

Other information
- For further information about leak diagnostics, see Leak diagnostics (certain markets only) Leak Diagnostics (Certain Markets Only)
- For information about test phases, see Test phases Test Phases.





Is the test result "NO FAULT FOUND" for both the leak diagnostic unit and the fuel tank system?

Yes - VERIFIED

No - VERIFICATION FAILED

------------------------

VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

-------------------------------------------------

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 - FAULT-TRACING FAILED

No - Attempt New Test

------------------------

Attempt New Test - Checking other diagnostic trouble codes (DTCs)

FAULT-TRACING FAILED - No Fault Found

-------------------------------------------------

FAULT FOUND - DONE

No Fault Found - No Fault Found

- DONE

- Fault Found

-------------------------------------------------

Intermittent fault
The control module has previously detected a fault in the leak diagnostic unit but the fault is not active at present.
Check the leak diagnostic unit connectors. Check for contact resistance and oxidation.
Check the hose and the filter for the air intake on the leak diagnostic unit. Check for blockages.
Remedy as necessary.

Other information:
- For resistance values, see Component specifications Specifications
- To connect the breakout box, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- To access or replace the leak diagnostic unit, see Leak diagnostic pump, replacing Service and Repair
- For information about signals on 5 cylinder engines, see Signal specification Signal Description / Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Description / Specification
- Checking wiring and terminals Checking Wiring And Terminals.


Continue - Fault-tracing information

-------------------------------------------------

Verification
Verification
VERIFIED - Fault Found

VERIFICATION FAILED - Fault-tracing information

-------------------------------------------------

Fault-tracing information




Information

Fault-tracing information
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).

Do you want to view the information again?

Yes - Attempt New Test

No - Fault Found

------------------------

Attempt New Test - engine control module (ECM)

FAULT FOUND - DONE

-------------------------------------------------

Fault-tracing information
Information
Attempt New Test - engine control module (ECM)

FAULT-TRACING FAILED - No Fault Found

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