Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking wiring and connectors




- Ignition off.
Check the boost pressure sensor and engine control module (ECM) connectors for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Remedy as necessary.













Select Continue.

Continue - Checking the boost pressure sensor signal

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Checking the boost pressure sensor signal




- Reinstall the connector
- Ignition on.
Read off the boost pressure and atmospheric pressure.
Check that the boost pressure sensor value does not deviate from the atmospheric pressure sensor value by more than 200 mbar. The atmospheric pressure sensor value is used as a reference value for this test.









Is the boost pressure sensor value within 200 mbar of the atmospheric pressure sensor value?

Yes - FAULT FOUND

No - Checking the wiring

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Checking the wiring




- Ignition off.
Check the signal cable between boost pressure sensor connector terminal 3 and control module terminal 13. Check the power supply cable between boost pressure sensor terminal 1 and control module terminal 74. Check these cables for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.
Check the boost pressure sensor signal cable terminal 3 to control module terminal 13 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

Other information
- To connect the breakout box, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- For information about signals, see Signal specification EMS2000.





Select Continue when the fault has been remedied.

Continue - Checking the boost pressure sensor signal

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Checking the boost pressure sensor signal




- Reinstall the connector
- Ignition on.
Read off the boost pressure and atmospheric pressure.
Check that the boost pressure sensor value does not deviate from the atmospheric pressure sensor value by more than 200 mbar. The atmospheric pressure sensor value is used as a reference value for this test.
Try a new boost pressure sensor if the boost pressure sensor value does not correspond to the atmospheric pressure sensor value.





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.




- Reinstall the components, reconnect the connectors etc.
- Ignition on.




- Read off the boost pressure sensor and atmospheric pressure sensor values by clicking on the VCT-2000 symbol
- Compare the boost pressure sensor and atmospheric pressure sensor values. The atmospheric pressure sensor value is used as a reference value for this test

Is the boost pressure sensor value correct?

Yes - VERIFIED

No - 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 - Checking wiring and connectors

FAULT-TRACING FAILED - No Fault Found

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