Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking the connector








- Ignition off
- Check the connector on boost pressure sensor 1. Check for contact resistance and oxidation according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault
- Reinstall the components, reconnect the connectors etc.
- Ignition on
- Read off the signal from the boost pressure sensor 1.
Check that the signal is correct. The reading must be approximately 1000 mbar. The value varies according to other circumstances dependent on the air pressure.
If the signal is now OK, the fault was caused by poor contact in the connector.

Other information
- Boost pressure sensor 1, replacing Boost Pressure Sensor 1, Replacing









Is the signal OK?

Yes - FAULT FOUND

No - Checking the wiring and component

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Checking the wiring and component
Check the signal cable between control module terminal #72 and connector terminal #3 on boost pressure sensor 1. Check for an open-circuit according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault. Check for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check the power supply cable between connector terminal #2 on boost pressure sensor 1 and control module terminal #74. 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 boost pressure sensor 1 if no fault is found during the above fault-tracing.

Other information
- To connect the breakout box and access the control module, see Connecting the breakout box. EMS 2000 Connecting The Breakout Box. EMS 2000
- Boost pressure sensor 1, replacing Boost Pressure Sensor 1, Replacing
- Signal specification Signal Specification













Continue - Verification

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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 boost pressure sensor 1
- Check that the signal is correct. The reading must be approximately 1000 mbar. The value varies according to other circumstances dependent on the air pressure

Is the value correct?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - FAULT FOUND

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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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking the connector

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