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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Engine Controls - Tests W/Codes - Body Control Computer) >> Self-Diagnostic Tests >> Test 15A - Diagnosing Overhead Travel Information SYS (OTIS)

Test 15A - Diagnosing Overhead Travel Information SYS (OTIS)

WARNING: This page is about a different car, the 1994 Eagle Vision, 1994 Dodge Intrepid, 1994 Chrysler New Yorker, 1994 Chrysler LHS, and 1994 Chrysler Concorde. However, it is still accessible from the selected car via links, so may be relevant.
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. Connect DRB to Data Link Connector (DLC). DLC is located under instrument cluster, next to center console. If Overhead Travel Information System (OTIS) is blank or if DRB displays NO RESPONSE, go to TEST 15B. If OTIS screen is not blank and DRB does not display NO RESPONSE, go to next step.
  2. Using DRB, start OTIS self test. If any OTIS segment fails to illuminate, or OTIS screen displays FAIL or CCD, replace OTIS module. If OTIS segments illuminate, and OTIS screen does not display FAIL or CCD, go to next step.
  3. Rotate instrument cluster dimmer control to low. If OTIS does not respond to instrument cluster dimmer control, go to TEST 5A. If OTIS responds to dimmer control, go to next step.
  4. Check if outside temperature display is inoperative or wrong. If temperature display does not operate properly, go to TEST 15E  . If outside temperature display is operating properly, go to next step.
    NOTE: The Miles Per Gallon (MPG), instantaneous fuel economy, and distance to empty calculations (displays) are only accurate to plus or minus 5 percent.
  5. Check if Miles Per Gallon (MPG) display and instantaneous fuel economy display are operating properly. If MPG display or fuel economy display are not operating properly, go to TEST 15D  . If MPG display or fuel economy display are operating properly, go to next step.
  6. Check for OTIS response to all of its switches. If OTIS fails to respond to any of its switches, go to TEST 15C  . If OTIS responds to all its switches, go to next step.
  7. Check if distance to empty display is inoperative or wrong. If distance to empty display is inoperative or wrong, go to TEST 8A  . If distance to empty is operating properly, go to next step.
  8. Check if trip odometer display is inoperative or wrong. If trip odometer is inoperative or wrong, go to TEST 15C  . If trip odometer is operating properly, go to next step.
  9. Check if estimated time display is inoperative or wrong. If estimated time display is inoperative or wrong, replace body control module. If estimated time display is operating properly, go to next step.
  10. Check if compass is inoperative or wrong. If compass is operating properly, OTIS is operating properly at this time. If compass is inoperative or wrong, go to next step.
  11. Locate open area away from large metal objects. Turn ignition switch to ON position. Press and hold compass/temperature button until CAL is displayed. Driving slowly, perform 3 complete circles. CAL lamp will turn off and compass will be calibrated.
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