TM 1–1520–238–T–3
15–54
Change 4
15–233 SIGNAL NAME:
TADS ANTI–ICE TO TPS (ACY) TADS ANTIICE CMD (ACZ)
MEMORY LOCATION: 001220
MEMORY DATA BIT(S):
14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS anti–ice selection.
REMARKS: From FCC through LH FAB MRTU Type I to TADS power supply (TPS).
PASS:
If second digit on HOD is 4, 5, 6, or 7, go to paragraph 15–234.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TPS, TPS.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–234 SIGNAL NAME:
TADS ANTI–ICE TO TEU (ACY) TADS ANTIICE CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS anti–ice selection.
REMARKS: From FCC through LH FAB MRTU Type I to TADS electronic unit (TEU)
PASS:
Location of fault if third digit on HOD is 2, 3, 6, or 7: troubleshoot wiring between TADS power
supply and TADS NSA (TM 1–1270–476–T).
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–235 SIGNAL NAME:
TEU TEST IN PROGRESS
MEMORY LOCATION: 001141
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates FD/LS test in progress.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 0, 2, 4, or 6, go to paragraph 15–236.
FAIL: Location of fault: replace TEU (TM 1–1270–476–T).
15–236 SIGNAL NAME:
TEU STATUS
MEMORY LOCATION: 001137
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates FD/LS TEU failure.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
Location of fault if fifth digit on HOD is 1, 3, 5, or 7: wiring between TEU and TADS power
supply. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
FAIL: Location of fault: replace TEU (TM 1–1270–476–T).
15–237 SIGNAL NAME:
TPS STATUS
MEMORY LOCATION: 001137
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates FD/LS TPS failure.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 2, 3, 6, or 7, go to paragraph 15–26.
FAIL: Location of fault: wiring from TPS to TEU. Troubleshoot wiring to isolate fault
(TM 1–1270–476–T).
