09/17/19
Message Overview:
Fault Message:
OPEN CKT - INLET TEMP SENSOR/WIRING
Fault Code:
4960196APU
Associated CAS:
| Reporting LRU: | Full-Authority Digital Engine-Controller (FADEC) |
| System Description: | 49-60-00 |
| 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 Inlet Temperature Sensor conditioning voltage in the Full-Authority Digital Engine-Controller (FADEC) is in range but the signal input read by the FADEC is out of range high. This shows a possible open in the Inlet Temperature Sensor or the engine branched wiring-harness.
Possible Causes:
- Auxiliary Power Unit (APU) Full-Authority Digital Engine-Controller (FADEC) (A108)
- Inlet Temperature Sensor (MT3)
- 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 Inlet Temperature Sensor | AMM 49-61-09-000-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Installation of the Inlet Temperature Sensor | AMM 49-61-09-400-801 [ Global Express ] [ G5000 ] [ Global XRS ] |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 [ Global Express ] [ G5000 ] [ Global XRS ] |
Troubleshooting Recommendations:
- Examine the engine branched wiring-harness for bare wiring, kinks, worn areas and other damage (WM 49-12).
- If there is bare wiring, kinks, worn areas or other damage, replace engine branched wiring-harness and do close out.
- If NO, continue with next step.
- Examine the inlet pressure sensor (MT3) receptacle for contamination and damage.
- If contaminated or damaged, go to step 7.
- If NO, continue with next step.
- Perform a continuity check between the pins on the inlet temperature sensor (MT3) receptacle as follows:
From To Expected Result Result MT3P1-A MT3P1-B 50-250 ohms - If there is no continuity, go to step 7.
- If there is continuity, continue with next step.
- Perform a wiring check between APU (P802) and inlet temperature sensor (MT3P1).
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Perform a wiring check between APU (P802) and FADEC (A108BP1).
- If wiring checks are not good, repair defective wiring as required and do close out.
- If wiring checks are good, continue with next step.
- Replace FADEC (A108).
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace the inlet temperature sensor (MT3).
- Do close out.