TM 9-2320-364-20-3 2-1928 2.  CTIS INOPERATIVE (CONT). 4. Replace controller protection device (Para 13-13). Verify repair, go to Step 11 of this Fault. YES NO Heater operates indicating 24   vdc are input to circuit breaker   CB17. System air pressure greater   than 110 psi (758 kPa). CTIS lines and components   not leaking. No lights illuminated on   controller. CTIS wire harness connections   OK. Voltage regulator OK. Circuit breaker CB17 OK. CTIS protection device faulty. Wire 1880 faulty. Wire 1435 faulty. CTIS controller faulty. Wire 1065 faulty. Front manifold faulty. Wire 1064 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If 22 to 28 vdc are not present, protection device is faulty. WARNING 5. Repair wire 1880 (see schematic Fig 2-48) or notify DS Maintenance. Verify repair, go to Step 11 of this Fault. YES NO Heater operates indicating 24   vdc are input to circuit breaker   CB17. System air pressure greater   than 110 psi (758 kPa). CTIS lines and components   not leaking. No lights illuminated on   controller. CTIS wire harness connections   OK. Voltage regulator OK. CTIS protection device OK. Circuit breaker CB17 OK. Wire 1880 faulty. Wire 1435 faulty. CTIS controller faulty. Wire 1065 faulty. Front manifold faulty. Wire 1064 faulty. KNOWN INFO POSSIBLE PROBLEMS TEST OPTIONS REASON FOR QUESTION Voltage test. STE/ICE-R #89. If 22 to 28 vdc are not present, wire 1880 is faulty. Are 22 to 28 vdc measured on wire 1880 at protection device connector MC35 terminal 10? Are 22 to 28 vdc measured on wire 1880 at harness connector MC35, terminal 10? Read   WARNING on Page 2-1929 WARNING Read   WARNING on Page 2-1929