04/09/21
Message Overview:
Message Description:
Proximity Sensor Electronic Unit (PSEU) detects an OPEN circuit within the Proximity Sensor PX15 Passenger Door Closed or in the wiring to the Proximity Sensor or aircraft.
Possible Causes:
- Proximity Sensor Electronic Unit (PSEU) (A9)
- Passenger Door Closed Proximity Sensor (PX15)
- 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 |
| Built-In Test of the Door Proximity-Sensors | AMM 52-71-00-740-801 |
| Removal of the Passenger-Door Closed Proximity-Sensor | AMM 52-71-01-000-801 |
| Installation of the Passenger-Door Closed Proximity-Sensor | AMM 52-71-01-400-801 |
| Wiring - Maintenance Practices - ALL | SPM 20-12-00-02 |
| Wire Repair - Maintenance Practices - ALL | SPM 20-12-10-02 |
Troubleshooting Recommendations:
- Pull and reset the PSEU gear system breakers (CB1-C13, CB1-C14, CB2-C13, CB2-C14) recheck the system for the fault.
- Verify the wiring from the PSEU A9AP1 PIN 5E to PX15P1 PIN 1, and from PSEU A9AP1 PIN 6E to PX15P1 PIN 2.
- If the wiring checks good, download and have field service review the PSEU NVM. Further troubleshooting will depend on results of the PSEU NVM.
- If the fault is still there replace PX15 per the installation procedure, and then check the sensor.
- If the fault is still there replace the PSEU.
- Functional check the PSEU 1.
- Do close out.
