Signal Missing. Permanent Fault
Signal missing. Permanent fault
Other diagnostic trouble codes (DTCs)
Note! Any other diagnostic trouble codes (DTCs) in EMS2000 must be remedied and erased before this fault-tracing can be carried out.
Are any other diagnostic trouble codes (DTCs) stored?
Yes - Other diagnostic trouble codes (DTCs), continued
No - Checking wiring and connectors
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Other diagnostic trouble codes (DTCs), continued
Have these diagnostic trouble codes (DTCs) been remedied?
Yes - Erasing diagnostic trouble code (DTC)
No - DONE
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Erasing diagnostic trouble code (DTC)
- Ignition on
- Erase diagnostic trouble codes (DTCs).
Select "Continue" when the diagnostic trouble codes (DTCs) have been erased.
Continue - Checking wiring and connectors
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Checking wiring and connectors
- Ignition off.
Check the connector on the leak diagnostic pump. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the signal cable between engine control module (ECM) terminal #41 and leak diagnostic pump terminal #4. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the power supply cable between system relay terminal #5 (87) and leak diagnostic pump terminal #2. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.
Try a new leak diagnostic pump if no fault is found during the above fault-tracing.
Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- To access or replace the leak diagnostic pump, see Replacing the leak diagnostic pump Removal and Replacement
- For information about signals see Signal specification EMS2000.
Select Continue when the fault has been remedied.
Continue - Verification
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Verification
Verification
Verification
Hint: After carrying out the repair, check that the fault has been remedied.
Note! This test cannot be performed if there are diagnostic trouble codes (DTCs) stored in EMS2000.
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Check that no other diagnostic trouble codes (DTCs) are stored. If other diagnostic trouble codes (DTCs) are stored, these must be remedied and erased first.
Are any other diagnostic trouble codes (DTCs) stored?
Yes - Fault-tracing information:
No - Activating the leak diagnostic
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Activating the leak diagnostic
- Start the engine and let it idle.
Note! The engine must be idling throughout the test.
- Clicking the VCT2000 symbol to activate the leak diagnostic
- Wait until the engine coolant temperature (ECT) exceeds 50°C
- Start the leak diagnostic. YES is displayed during leak diagnostics
- Wait until the leak diagnostic is complete. Leak diagnostic active NO and leak diagnostic complete YES is displayed when the leak diagnostic is complete.
Hint: The time taken for the diagnostic varies depending on the fault status of the fuel tank system. The diagnostic may take up to 4 minutes.
- Read off the results of the leak diagnostic. The leak diagnostic results are read off automatically when the test has been correctly completed
- The OK status will be displayed if the control module has not detected any faults. The Not OK status, and a number from 1-8 will be displayed if the control module has detected any faults. To interpret these faults, see the status definitions below.
Note! The status types can be translated into diagnostic trouble codes (DTCs). However they are not stored as DTCs during this test.
- Click the stop button to re-run the test.
Status definitions:
- OK = The system is free of faults
- Not OK, status 1 = Leak diagnostic pump, signal too low. (ECM-65, signal too low)
- Not OK, status 2 = Leak diagnostic pump, signal too high. (ECM-65, signal too high)
- Not OK, status 3 = Leak diagnostic pump, faulty signal. (ECM-65, faulty signal)
- Not OK, status 4 = Leak diagnostic pump, blocked hose. (ECM-66, signal too low)
- Not OK, status 5 = Leakage 0.5 mm. (ECM-68, minor leak)
- Not OK, status 6 = Leakage 1 mm. (ECM-68, major leak)
- Not OK, status 7 = Leakage larger than 1 mm. (ECM-68, Fuel tank filler cap missing)
- Not OK, status 8 = Evaporative emission (EVAP) system blocked. (ECM-6A, signal too low).
Select a suitable alternative to continue:
1. The status is OK
2. Status Not OK, status 1, 2 or 3
3. Status Not OK, (for another diagnostic trouble code (DTC)) has been detected.
1 - VERIFIED
2 - VERIFICATION FAILED
3 - Fault-tracing information:
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Fault-tracing information:
- The control module has detected a fault other than the one that affects the relevant diagnostic trouble code (DTC). This may be because a fault occurred during the fault-tracing. Check that the hoses, connectors and components etc have been correctly reinstalled. Check that they are not damaged.
Select Continue.
Continue - VERIFIED
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Fault-tracing information:
- This diagnostic trouble code (DTC) cannot be verified before other DTCs have been remedied and erased
- Fault-trace, remedy and erase other diagnostic trouble codes (DTCs) first. Then select this diagnostic trouble code (DTC) to perform verification.
Select Continue.
Continue - VERIFICATION FAILED
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VERIFIED - FAULT FOUND
VERIFICATION FAILED - Fault-tracing information
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Fault-tracing information
Information
Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed.
Exit fault-tracing for this diagnostic trouble code (DTC) or make another attempt.
Do you want to exit fault-tracing?
Yes - FAULT-TRACING FAILED
No - Attempt New Test
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Attempt New Test - Other diagnostic trouble codes (DTCs)
FAULT-TRACING FAILED - No Fault Found
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