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Home >> Dodge and Ram >> 1999 >> Caravan Base, 2.4 B >> Repair and Diagnosis >> Body & Frame >> Body, Cab Control Systems >> Body Control Computer - Tests >> Power Door Lock System >> Automatic Door Locks Fail To Lock Over 15 Mph

Automatic Door Locks Fail To Lock Over 15 Mph

NOTE: For connector terminal identification and wiring diagrams, see BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1A  after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
  1. Using scan tool, select BODY SYSTEM, then BODY COMPUTER. Scan tool will perform a CCD bus test. If scan tool displays BUS FAILED or NO RESPONSE, see appropriate VEHICLE COMMUNICATIONS article. If scan tool does not display BUS FAILED or NO RESPONSE, go to next step.
  2. Using scan tool, select SENSOR DISPLAY and read IGNITION VOLTAGE. If scan tool displays less than 10 volts, see appropriate VEHICLE COMMUNICATIONS article. If scan tool displays 10 volts or more, go to next step.
  3. Drive vehicle over 15 MPH with all doors closed. If doors locked when speed reached 15 MPH, system is currently functioning correctly. If doors did not lock when speed reached 15 MPH, go to next step.
  4. Using scan tool, read auto door lock status. If scan tool shows AUTO DOOR LOCKS ARE ENABLED, go to next step. If scan tool does not show AUTO DOOR LOCKS ARE ENABLED, using scan tool, enable door locks and retest system.
  5. Ensure driver door is closed. Using scan tool, read DR DOOR AJAR SWITCH status. If scan tool shows, DR DOOR AJAR: OPEN, go to next step. If scan tool does not show DR DOOR AJAR: OPEN, go to SHORTED DRIVER DOOR AJAR CIRCUIT  under INTERIOR LIGHTING SYSTEM.
  6. Ensure passenger door is closed. Using scan tool, read PASS DOOR AJAR SWITCH status. If scan tool shows, PASS DOOR AJAR: OPEN, go to next step. If scan tool does not show PASS DOOR AJAR: OPEN, go to SHORTED PASSENGER DOOR AJAR CIRCUIT  under INTERIOR LIGHTING SYSTEM.
  7. Ensure left sliding door is closed. Using scan tool, read LEFT SLIDING DOOR AJAR SWITCH status. If scan tool shows, LEFT SLIDING DOOR AJAR: OPEN, go to next step. If scan tool does not show LEFT SLIDING DOOR AJAR: OPEN, go to SHORTED LEFT SLIDING DOOR AJAR CIRCUIT  under INTERIOR LIGHTING SYSTEM.
  8. Ensure right sliding door is closed. Using scan tool, read RIGHT SLIDING DOOR AJAR SWITCH status. If scan tool shows, RIGHT SLIDING DOOR AJAR: OPEN, go to next step. If scan tool does not show RIGHT SLIDING DOOR AJAR: OPEN, go to SHORTED RIGHT SLIDING DOOR AJAR CIRCUIT  under INTERIOR LIGHTING SYSTEM.
  9. Ensure liftgate door is closed. Using scan tool, read LIFTGATE DOOR AJAR SWITCH status. If scan tool shows, LIFTGATE DOOR AJAR: OPEN, go to next step. If scan tool does not show LIFTGATE DOOR AJAR: OPEN, go to SHORTED LIFTGATE DOOR AJAR CIRCUIT  under INTERIOR LIGHTING SYSTEM.
  10. Using scan tool, read CCD BUS INFO in BCM MONITORS. Observe TPS percentage while moving throttle. If TPS percentage increases while throttle is opened, go to next step. If TPS percentage does not increase while throttle is opened, TPS is inoperative. Repair as necessary.
  11. Raise and support vehicle. If vehicle is equipped with AWD, ensure all wheels are supported. Start engine and place transmission in drive. Using scan tool, read ENGINE INFO in BCM MONITORS. Observe VSS while wheels rotate. If MPH increases when throttle is opened, system is currently functioning correctly. If MPH does not increase when throttle is opened, VSS is inoperative. Repair as necessary.
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