Fault-Tracing Information

Fault-tracing ECM-P222700

Checking the components and wiring

Note! Check if other diagnostic trouble codes (DTCs) are stored for the internal atmospheric pressure sensor or if diagnostic trouble codes (DTCs) for the air pressure sensor in the inlet manifold are stored in the Engine Control Module (ECM). These diagnostic trouble codes (DTCs) must be fault-traced and any faults remedied first.




- Ignition on.
Activate reading the value from the manifold absolute pressure (MAP) sensor and the atmospheric pressure sensor.
Check the difference between pressures, the difference shall not be greater than 70 hPa.

Hint: Normal atmospheric pressure is 1013 hPa.

Check cables and connectors to the air pressure sensor inlet for contact resistance or oxidation, short-circuit to ground and voltage as well as open circuit.
Remedy as necessary.
Try with a new air pressure sensor. Check the difference between pressures, the difference shall not be greater than 70 hPa.
When the difference between the pressures is greater than 70 hPa this indicates that the internal atmospheric pressure sensor in the engine control module (ECM) is damaged. The atmospheric pressure sensor is built into the engine control module (ECM) and therefore cannot be replaced as a separate item.
Remedy as necessary.

Other information
- Connecting the breakout box, B6304T4 Connecting the Breakout Box, Engine Control Module (ECM)
- Signal specification, B6304T4 Signal Specification, Engine Control Module (ECM)
- Location of components, B6304T4 Locations
- Checking wiring and terminals Checking Wiring and Terminals





Continue - Verification

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Verification




Verification

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








- Ignition off
- Reinstall the connectors, components etc.
- Ignition on
Read off the pressure sensor signal for intake pressure and the atmospheric pressure sensor signal by clicking on the VCT2000 symbol.
Check that the values correspond. The atmospheric pressure sensor signal is used as a reference value in this check.





Is the value within its permitted range?

Yes - VERIFIED

No - VERIFICATION FAILED

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VERIFICATION FAILED - Fault-tracing information

VERIFIED - DONE

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Fault-tracing information

FAULT-TRACING FAILED - DONE

Attempt New Test - Checking the components and wiring

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