TM 1–1520–238–T–3
28–2
Change 5
28–2 SIGNAL NAME:
MESSAGE ERROR
MEMORY LOCATION: 002522
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 28–9.
FAIL: Location of fault: Replace DTR (TM 11–1520–238–23–1).
28–3 SIGNAL NAME:
SUBSYSTEM FLAG
MEMORY LOCATION: 002522
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 28–11.
FAIL: Location of fault: Replace DTC (TM 11–1520–238–23–1).
28–4 SIGNAL NAME:
DTC ON BOARD
MEMORY LOCATION: 002523
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates the DTC has been installed.
REMARKS: From DTU to FCC.
PASS:
If first digit on CDU is 2, 4 or 6, go to paragraph 28–5.
FAIL: Location of fault: Replace DTC (TM 11–1520–238–23–1).
28–5 SIGNAL NAME:
DTC READY
MEMORY LOCATION: 002523
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates the DTC installed and loaded. Awaiting operator action.
REMARKS: From DTU to FCC.
PASS:
If first digit on CDU is 0 or 4, go to paragraph 28–6.
FAIL: Location of fault: Replace DTR (TM 11–1520–238–23–1).
28–6 SIGNAL NAME:
ADDR PTR VALID
MEMORY LOCATION: 002523
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates the DTR address pointer is valid.
REMARKS: From DTU to FCC.
PASS:
If first digit on CDU is 0, go to paragraph 28–9.
FAIL: Location of fault: Replace DTR (TM 11–1520–238–23–1).
