Quick Test of the Fuel Tank System
Quick test of the fuel tank system (USA/CDN)
Checking diagnostic trouble codes (DTCs), engine control module (ECM)
Note! There must be no diagnostic trouble code(s) (DTC) for the evaporative emission system (EVAP) and valve (ECM-420X, ECM-421X) or leak diagnostic unit (ECM-432X, ECM-433X). These could prevent the leak diagnostic. Check that none of these diagnostic trouble codes (DTCs) are stored.
- Ignition on.
Activate reading off diagnostic trouble codes (DTCs).
If any of the above diagnostic trouble codes (DTCs) are stored they must be remedied and erased first.
Are any of the above diagnostic trouble codes (DTCs) stored?
Yes - No Fault Found
No - Quick test of the fuel tank system
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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 the quick test of the fuel tank system to start:
- There must be no diagnostic trouble codes (DTCs) stored for the evaporative emission system (EVAP) and valve or leak diagnostic unit
- 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 amount of fuel in the tank. Connect a battery charger if necessary.
- Activate 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".
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 unit 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 corresponding relevant diagnostic trouble code (DTC), depending on the fault.
Hint: A diagnostic trouble code (DTC) for the fault will be stored in the engine control module (ECM) if the test result is "Fault found".
Other information
- For information about leak diagnostics, see VIDA Design and Function
- Description of parameters, quick test of the fuel tank system, B5244T5, B5254T2 Description of Parameters, Quick Test of the Fuel Tank System
- Test phases, quick test fuel tank system, B5244T5, B5254T2 Test Phases, Quick Test Fuel Tank System
Select an alternative to continue when the test is complete:
Select an alternative to continue when the test is completed:
1. All test results are OK, "No fault found".
2. The test result for the fuel tank system, major leak (ECM-439C) or minor leak (ECM-434C) is "Fault found".
3. The quick test does not start or the test result for the leak diagnostic unit (ECM-436X) is "Fault found".
1 - No Fault Found
2 - Fault-tracing information:
3 - Fault-tracing information:
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Fault-tracing information:
- The engine control module (ECM) has detected a fault during the fuel tank system quick test. The diagnostic trouble code (DTC) is stored in the engine control module (ECM).
Read off diagnostic trouble codes (DTCs) from the vehicle communication socket. Fault trace the diagnostic trouble code (DTC) stored in the engine control module (ECM)
- Remedy as necessary.
Select a suitable alternative to continue:
1. Repeat the quick test for the fuel tank system
2. Exit.
1 - engine control module (ECM)
2 - No Fault Found
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Fault-tracing information:
- The engine control module (ECM) cannot run the leak diagnostic by activating the quick test of the fuel tank system. This may be because the conditions for starting the quick test of the fuel tank system have not been met or because there is a fault preventing the quick test from starting
- 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 engine control module (ECM).
- Remedy as necessary.
Select a suitable alternative to continue:
1. Repeat the quick test for the fuel tank system
2. Exit.
1 - engine control module (ECM)
2 - No Fault Found
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