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Test 15B - OTIS Screen Blank

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagrams, see WIRING DIAGRAMS  . Perform TEST VER-1 after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector.
  1. Turn ignition switch to OFF position. Disconnect OTIS 4-pin connector. Using DRB in ohmmeter mode, check resistance of OTIS 4-pin connector terminal No. 3 (Black/Light Green wire). If resistance is more than 5 ohms, repair open Black/Light Green wire. If resistance is less than 5 ohms, go to next step.
  2. Turn ignition switch to ON position. Using DRB in voltmeter mode, check voltage on OTIS 4-pin connector terminal No. 4 (Dark Blue/White wire). If voltage is less than 10 volts, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
  3. Connect jumper wire between OTIS 4-pin connector terminal No. 1 (White/Black wire) and ground. Using DRB, read CCD bus status. If DRB does not display BUS SHORTED TO GROUND, repair open White/Black wire. If DRB displays BUS SHORTED TO GROUND, disconnect jumper wire. Go to next step.
  4. Connect jumper wire between OTIS 4-pin connector terminal No. 2 (Violet/Brown wire) and ground. If DRB does not display BUS SHORTED TO GROUND, repair open Violet/Brown wire. If DRB displays BUS SHORTED TO GROUND, replace OTIS module.
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