Signal Too Low - Intermittent Fault

Signal too low. Intermittent fault

Checking the wiring
Check the power supply cable between control module terminal #A39 (#A39) and mass air flow (MAF) sensor terminal #4. Check for an intermittent short-circuit to ground.
Check the power supply cable between control module terminal #A39 (#A39) and boost pressure sensor terminal #1. Check for an intermittent short-circuit to ground.
Check the power supply cable between control module terminal #A39 (#A39) and air conditioning (A/C) pressure sensor terminal #3. Check for an intermittent short-circuit to ground.
Check the power cable between control module terminal #B10 (#B20) and fuel tank pressure sensor connector terminal #3. Check for an intermittent short-circuit to ground.

Hint: Read off the 5-volt power supply by clicking on the VCT2000 symbol.

Remedy as necessary.

Other information:
- To connect the breakout box, see Connecting the breakout box, B5244T5, B5254T2 Connecting the Breakout Box
- For information about signals on 5 cylinder engines, see Signal specification Signal Description / Specification
- For information about signals on 6 cylinder engines, see Signal specification Signal Description / Specification
- To access or replace the mass air flow (MAF) sensor, see
- To access or replace the boost pressure sensor. See Temperature and pressure sensor, replacing Service and Repair.









Continue - Fault-tracing information

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Fault-tracing information




Information

Fault-tracing information
If the fault is intermittent, do not verify fault-tracing if the fault does not recur.
It is possible to view the information again, or leave fault-tracing for this diagnostic trouble code (DTC).

Do you want to view the information again?

Yes - Attempt New Test

No - Fault Found

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FAULT FOUND - DONE

Attempt New Test - Checking the wiring

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