TM 1–1520–238–T–3
15–34
Change 4
15–141 SIGNAL NAME:
IAT CONTRAST SEL TO TEU
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
8–9
(BINARY)
CONDITION:
If fourth digit displayed on HOD is 0 or 1=AUTO
If fourth digit displayed on HOD is 2 or 3=BLK
If fourth digit displayed on HOD is 6 or 7=WHT
SIGNAL FUNCTION:
Indicates target color on IAT polarity.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to selected switch mode, go to paragraph 15–142.
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).
15–142 SIGNAL NAME:
ORT FLIR PLRT SWITCH (ACY) ORT PLRT SW (ACZ)
MEMORY LOCATION: 000414
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected FLIR polarity.
REMARKS: From ORT righthand grip through CPG MRTU Type III to FCC.
PASS:
If fifth digit on HOD is 1, 4, or 5, go to paragraph 15–143.
FAIL: Location of fault: ORT RH grip, wiring from ORT to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–143 SIGNAL NAME:
FLIR POLARITY CONTROL (ACY) FLIR PLRT CMD (ACZ)
MEMORY LOCATION: 000562
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
If fourth digit displayed on HOD is 0, 2, 4, or 6=BLK
If fourth digit displayed on HOD is 1, 3, 5, or 7=WHT
SIGNAL FUNCTION:
Selects FLIR polarity; determines whether hot is displayed black or white.
REMARKS: From FCC through CPG MRTU Type III to TEU.
PASS:
If CONDITION corresponds to selected switch mode, go to paragraph 15–144.
FAIL: Location of fault: CPG MRTU Type III, wiring from CPG MRTU Type III to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–144 SIGNAL NAME:
IAT AUTO TRACK TO TEU (ACY) IAT AUTO TRACK CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates IAT mode selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If fifth digit on HOD is a 1, 3, 5, or 7, go to paragraph 15–145.
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).
