Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the connectors




- Ignition off.
Check the boost pressure sensor connector for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.













Was a fault detected?

Yes - Verification

No - Checking the cable and components

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Checking the cable and components




- Ignition off.
Check the signal cable between boost pressure sensor 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 boost pressure sensor terminal 3 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring And Terminals. Permanent Fault.

Hint: The boost pressure sensor receives 5 V from control module terminal 74.

If no fault is found during the above fault-tracing, try a new boost pressure sensor according to Replacing the atmospheric pressure sensor Replacing Atmospheric Pressure Sensor if necessary.

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 - 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.
- Start the engine
- Rev the engine above 4000 rpm twice.




- Check whether the diagnostic trouble code (DTC) status changes to intermittent. If the fault has been remedied, the diagnostic trouble code (DTC) status should have changed to intermittent

Is the status of the diagnostic trouble code (DTC) intermittent?

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 the connectors

FAULT-TRACING FAILED - No Fault Found

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