Signal Too Low. Permanent Fault

Signal too low. Permanent fault

Checking cables
Check the power supply cable between the control module #A39 (#A39) and mass air flow (MAF) sensor #4 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check power supply cable between control module #A39 (#A39) and boost pressure sensor #1 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check power supply cable between control module #A39 (#A39) and air conditioning (A/C) pressure sensor #3 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.
Check power cable between control module #B10 (#B20) and fuel tank pressure sensor connector #3 for a short-circuit to ground according to Checking wiring and terminals. Permanent fault Checking Wiring and Terminals. Permanent Fault.

Hint: Read off 5 volt power supply by clicking on the VCT 2000 symbol.

Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box, B5234T9, B5244T7 Connecting The Breakout Box.
- For information about signals, see Signal specification Signal Specifications.
- To access/replace the mass air flow (MAF) sensor, see Mass air flow sensor (MAF), replacing, B5234T9, B5244T7 Air Flow Meter/Sensor.
- To access/replace the boost pressure sensor, see Manifold absolute pressure (MAP) sensor, replacing, B5234T9, B5244T7 Removal and Replacement.










Continue - Verification

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Verification




Verification

Hint: After carrying out the repair, check that the fault has been remedied.




- Ignition on.
- Read off the 5 volt supply.
The value must be 5 V.





Is the value OK?

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 - Exit fault-tracing

No - Attempt New Test

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Attempt New Test - Checking cables

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