03/10/21
Message Overview:
Message Description:
Proximity Sensor Electronic Unit (PSEU) detects an overload on the discrete output to the Traffic Collision and Avoidance System (TCAS).
Possible Causes:
- Traffic Alert and Collision-Avoidance System (TCAS) Transceiver (A5)
- Proximity Sensor Electronic Unit (PSEU) (A9)
- Associated Wiring
Troubleshooting Tips:
Advisory Wire/Service Bulletin: None
Forum Articles/Infoservice/Newsletter: None
Quick Links:
| Removal of the Proximity−Sensor Electronic Unit (PSEU) | AMM 32-61-09-000-801 |
| Installation of the Proximity−Sensor Electronic Unit (PSEU) | AMM 32-61-09-400-801 |
| Functional Test of the Proximity−Sensor Electronic Unit (PSEU) | AMM 32-61-09-720-801 |
| Operational Test of the Traffic Alert and Collision-Avoidance System (TCAS) | AMM 34-43-00-710-801 |
| Removal of the Traffic/Collision Avoidance System (TCAS) and Traffic Surveillance System (TSS) Transponder Unit | AMM 34-43-03-000-801 |
| Installation of the Traffic/Collision Avoidance System (TCAS) and Traffic Surveillance System (TSS) Transponder Unit | AMM 34-43-03-400-801 |
| Standard Practices - Replace Wiring | SPM 20-12-00-02 |
| Standard Practices - Wire Repair | SPM 20-12-10-02 |
Troubleshooting Recommendations:
-
- Do wiring check from the TCAS connector A5EP1 Pin 13F to the PSEU connector A9CP1 Pin 5D. Repair as required.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace the TCAS.
- If system checks are good, do close out.
- If fault remains, continue with next step.
- Replace the PSEU.
- Do close out.
- Do wiring check from the TCAS connector A5EP1 Pin 13F to the PSEU connector A9CP1 Pin 5D. Repair as required.