TM 1–1520–238–T–3
28–4
Change 5
28–12 SIGNAL NAME:
TERMINAL FLAG
MEMORY LOCATION: 002531
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates terminal fault.
REMARKS: From DTU to FCC.
PASS:
If first digit on CDU is 4 or 0, go to paragraph 28–13.
FAIL: Location of fault: From DTU circuit breaker to DTR. Troubleshoot wiring to isolate fault
(TM 11–1520–238–23–2).
28–13 SIGNAL NAME:
MESSAGE ERROR
MEMORY LOCATION: 002531
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicate a message error.
REMARKS: From DTU to FCC.
PASS:
If fourth digit on CDU is 0, go to paragraph 28–15.
FAIL: Location of fault: Replace DTR (TM 11–1520–238–23–1).
28–14 SIGNAL NAME:
SUBSYSTEM FLAG
MEMORY LOCATION: 002531
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates DTC battery low.
REMARKS: From DTU to FCC.
PASS:
If first digit on CDU is 0, go to paragraph 28–17.
FAIL: Location of fault: Replace DTC (TM 11–1520–238–23–1).
28–15 SIGNAL NAME:
TERMINAL FLAG
MEMORY LOCATION: 002575
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates terminal fault.
REMARKS: From FCC to DTU.
PASS:
If first digit on CDU is 4 or 0, go to paragraph 28–16.
FAIL: Location of fault: From DTU circuit breaker to DTR. Troubleshoot wiring to isolate fault
(TM 11–1520–238–23–2).
28–16 SIGNAL NAME:
MESSAGE ERROR
MEMORY LOCATION: 002575
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicate a message error.
REMARKS: From DTU to FCC.
PASS:
If fourth digit on CDU is 0, go to paragraph 28–18.
FAIL: Location of fault: Replace DTR (TM 11–1520–238–23–1).
