TM 9-2320-302-20 0018 00-3 COLLISION WARNING SYSTEM (CWS) TROUBLESHOOTING - CONTINUED 0018 00 CWS TROUBLESHOOTING PROCEDURES NOTE • Perform Initial System Troubleshooting prior to replacing any component. • Asterisk (*) indicates step requiring Pro-link w/cartridge. Table 2. CWS Troubleshooting Procedures. MALFUNCTION TEST OR INSPECTION CORRECTIVE ACTION 1.  Red Fail Light on Driver’s Display Unit or Side Sensor Display Illuminates Continuously. 1.  While  performing  side  sensor test, wave hand in front of side sensor  and  verify  that  correct signal is received.* If  OK,  proceed  to  next  step.  If NOT OK, replace side sensor (WP 0111 00). 2.  Verify  a  5-volt  output  at  side sensor signal wire at side sensor connector, with a target present. If  OK,  notify  supervisor.  If  NOT OK, replace side sensor (WP 0111 00). 2.  Warnings Tones Not Audible. 1.  Verify volume control knob is turned fully clockwise. Turn  volume  control  knob  fully clockwise. 2.  Turn  system  off  and  back  on. Turn volume control knob and listen for tone. If  tone  is  not  heard,  proceed  to next step. 3.  Perform speaker test and verify audible    tone    is    heard    from DDU speaker.* If  tone  is  not  heard,  proceed  to next step. 4.  Verify speed input. If  OK,  proceed  to  next  step.  If NOT OK, replace DDU (WP 0111 00). 5.  Perform  brake  test  and  verify correct signal is received when brake pedal is depressed.* If  OK,  notify  supervisor.  If  NOT OK, replace DDU (WP 0111 00). 3.  Warning   Tones   Audible   When   Brakes   Are Applied. 1.  Perform brake test and confirm receipt  of  correct  signal  when brake pedal is depressed.* If  OK,  proceed  to  next  step.  If NOT OK, replace DDU (WP 0111 00). 2.  Verify   brake   mode   setting   is correctly configured in CPU.* If  OK,  proceed  to  next  step.  If NOT OK, notify supervisor. 3.  Verify brake logic is correctly configured.* If  OK,  replace  DDU  (WP 0111 00). If NOT OK, notify supervisor. 4.  Side   Sensor   Warning   Tone   Audible   When Brakes Are Applied. 1.  Verify tone is not audible when hand is waved in front of side sensor  with  only  brake  pedal depressed (turn signal not activated). If   tone   is   heard,   replace   side sensor (WP 0111 00). If tone is not heard, proceed to next step.