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Test 19F - Diagnosing Door Unlock Circuit

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For wiring diagram, see WIRING DIAGRAMS article in this section.
CAUTION: Always turn ignition off prior to disconnecting or connecting any module connector.
  1. Remove door unlock relay (third relay from right, bottom row) from micro relay center, located behind center console. Using DRB in voltmeter mode, check voltage on door lock switch output unlock circuit (Pink/Violet wire) at door unlock relay connector. Observe DRB voltage while depressing each power door lock switch to UNLOCK position. If voltage is less than 10 volts when each switch is depressed, repair open Pink/Violet wire. Perform test VER-1B. If voltage is more than 10 volts when each switch is depressed, go to next step.
  2. Check voltage on fused battery feed circuit (Red wire) at door unlock relay connector. If voltage is less than 10 volts, repair open Red wire. Perform TEST VER-1B  . If voltage is more than 10 volts, go to next step.
  3. Using DRB in ohmmeter mode, check resistance of unlock relay ground circuit (Black wire) at door lock relay connector terminal "E". If resistance is more than 5 ohms, repair open Black wire. Perform TEST VER-1B  . If resistance is less than 5 ohms, go to next step.
  4. Ensure door lock relay is installed (fourth relay from right, bottom row). Using DRB in ohmmeter mode, check resistance of unlock relay output circuit (Pink/Black wire) at door unlock relay connector. If resistance is less than 5 ohms, replace door unlock relay. Perform TEST VER-1B  . If resistance is more than 5 ohms go to next step.
  5. Remove door lock relay. Check resistance of system ground circuit (Black wire) at door lock relay connector terminal "D". If resistance is more than 5 ohms, repair open Black wire. Perform TEST VER-1B  . If resistance is less than 5 ohms, replace door lock relay. Perform TEST VER-1B  .
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