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(WARNING)
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WHITE MESSAGE Require immediate crew attention. These messages are accompanied by flashing master warning, triple chime attenson with or without voice message or dedicated tone. Require immediate crew awareness and future crew action may be required in the form of alternate system selection or performance limitation. These message are accompanied by flashing master caution and a single chime. Indicate safe or normal system operation which require crew awareness, over and above the dark cockpit philosophy. Indicate minor failures or reduction in systems capability, which require no crew action.

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09/19/19

Message Overview:

Fault Message:

OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

Fault Code:

4960233APU

Associated CAS:

None

Reporting LRU: Full-Authority Digital Engine-Controller (FADEC)
System Description: 49-90-00
Schematic Diagram: 49-61-00 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wiring Diagram: 49-12-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]
49-61-01 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Fault Description:

The signals from the Oil Level Sensor to the Full-Authority Digital Engine-Controller (FADEC) are out of the expected range. This shows a possible short or open in the measured or compensating signal lines of the Oil Level Sensor, the engine branched wiring-harness or the aircraft wiring harness.

Possible Causes:

  • Oil Level Sensor (MT2)
  • Full-Authority Digital Engine-Controller (FADEC) (A108)
  • Associated Wiring

Troubleshooting Tips:

Advisory Wire/Service Bulletin: None

Forum Articles/Infoservice/Newsletter: None

Quick Links:

APU Safety Precautions AMM 49-00-00-910-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Engine Branched Wiring-Harness AMM 49-12-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Engine Branched Wiring-Harness AMM 49-12-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Full-Authority Digital
Engine-Controller (FADEC)		 AMM 49-61-01-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Full-Authority Digital
Engine-Controller (FADEC)		 AMM 49-61-01-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Removal of the Oil Level Sensor AMM 49-90-05-000-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Installation of the Oil Level Sensor AMM 49-90-05-400-801 [ Global Express ]  [ G5000 ]  [ Global XRS ]
Wire Repair - Maintenance Practices - ALL SPM 20-12-10-02 [ Global Express ]  [ G5000 ]  [ Global XRS ]

Troubleshooting Recommendations:

  1. Examine the engine branched wiring-harness for bare wiring, kinks, worn areas and other damage (WM 49-12).

    1. If there is bare wiring, kinks, worn areas or other damage, replace engine branched wiring harness and do close out.
    2. If there is no bare wiring, kinks, worn areas or other damage, continue with next step.

  2. Check any of the messages that follow shows on the CAIMS PMAT.

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  3. Examine oil level sensor (MT2) receptacle for contamination and damage.

    1. If there is contamination or damage, go to step 20.
    2. If there is no contamination or damage, continue with next step.

  4. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the fault message exists, troubleshoot it first and continue with next step.
    2. If the fault message does not exists, continue with next step.

  5. Perform a continuity check on oil level sensor (MT2) receptacle as follows (WM 49-12):

    From To Expected Result Result
    MT2P1-B MT2P1-E 26.2-30.2 ohms
    MT2P1-H MT2P1-E 26.2-30.2 ohms

    1. If the resistance is not within range, go to step 20.
    2. If the resistance is within range, continue with next step.

  6. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  7. Perform a continuity check between oil level sensor (MT2) and ground shell as follows (WM 49-12):

    From To Expected Result Result
    MT2P1-B Ground Shell >1 megaohm
    MT2P1-E Ground Shell >1 megaohm
    MT2P1-H Ground Shell >1 megaohm

    1. If the resistance is not within range, go to step 20.
    2. If the resistance is within range, continue with next step.

  8. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  9. Perform a wiring check between APU (P1) and oil level sensor connector (MT2P1).

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  10. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  11. Perform a continuity check on oil level sensor connector (MT2P1) as follows:

    From To Expected Result Result
    MT2P1-B MT2P1-H >1 megaohm

    1. If the resistance is not within range, replace engine branched wiring harness and do close out.
    2. If the resistance is within range, continue with next step.

  12. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  13. Perform a continuity check as follows (WM 49-12):

    From To Expected Result Result
    P802-33 Ground Shell >1 megaohm
    P802-34 Ground Shell >1 megaohm
    P802-61 Ground Shell >1 megaohm
    MT2P1-B Ground Shell >1 megaohm
    MT2P1-E Ground Shell >1 megaohm
    MT2P1-H Ground Shell >1 megaohm

    1. If the resistance is not within range, replace the engine branched wiring harness and do close out.
    2. If the resistance is within range, continue with next step.

  14. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  15. Perform a wiring check between aircraft wiring harness connector (J802) and FADEC connector (A108BP1) as follows:

    1. If wiring checks are not good, repair defective wiring as required and do close out.
    2. If wiring checks are good, continue with next step.

  16. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  17. Perform a continuity check on aircraft wiring harness connector (J802) as follows (WM 49-61):

    From To Expected Result Result
    J802P1-33 J802P1-34 >1 megaohm

    1. If the resistance is not within range, replace the engine branched wiring harness and do close out.
    2. If the resistance is within range, continue with next step.

  18. Check any of the messages that follow shows on the CAIMS PMAT.

    • OPEN/SHT CKT - OIL LVL SNSR/CMP WRG
    • OPEN/SHT CKT- OIL LVL SNSR/MEAS WRG

    1. If the message shows, troubleshoot them first and continue with next step.
    2. If the message does not show, continue with next step.

  19. Perform a continuity check as follows (WM 49-12):

    From To Expected Result Result
    J802-33 Ground Shell >1 megaohm
    J802-34 Ground Shell >1 megaohm
    J802-61 Ground Shell >1 megaohm
    A108BP1-F1 Ground Shell >1 megaohm
    A108BP1-K2 Ground Shell >1 megaohm
    A108BP1-H4 Ground Shell >1 megaohm

    1. If the resistance is not within range, repair defective wiring as required and do close out.
    2. If the resistance is within range, continue with next step.

  20. Replace the oil level sensor (MT2).
  21. Do close out.

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