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Test 36A - Repairing Liftgate Release Ignition Feed Circuit

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section. Perform TEST VER - 1A after each repair.
CAUTION: Always turn ignition switch to OFF position prior to disconnecting or connecting any module connector.
NOTE: Liftgate release will not work if liftgate is open or vehicle is moving. Ensure liftgate mechanical linkage is operating properly before proceeding with test.
  1. Turn ignition on and press liftgate release button. If liftgate solenoid operates, go to TEST 36B. If liftgate solenoid does not operate, read liftgate ajar switch status using DRB-II. If DRB-II does not display GATE AJAR:CLOSED, go to step 5).
  2. If DRB-II displays GATE AJAR:CLOSED, disconnect liftgate ajar switch connector. Read liftgate ajar switch status. If DRB-II does not display GATE AJAR:CLOSED, replace liftgate ajar switch.
  3. If DRB-II displays GATE AJAR:CLOSED, turn ignition off. Disconnect Natural body controller connector. Body controller is located under left side of instrument panel. Check connector, and clean or repair connector as necessary.
  4. Using DRB-II in ohmmeter mode, measure resistance of liftgate ajar sense circuit at Natural body controller connector terminal No. 4 (Tan/Black wire). If resistance is more than 5 ohms, replace body controller. If resistance is less than 5 ohms, repair short to ground in Tan/Black wire.
  5. Remove and inspect fuse No. 8 from fuse block. If fuse is okay, go to step 7). If fuse is blown, turn ignition off. Using DRB-II in ohmmeter mode, measure resistance of fused ignition feed circuit at fuse No. 8 (White wire).
  6. If resistance is less than 5 ohms, repair short to ground in White wire and replace fuse No. 8. If resistance is more than 5 ohms, replace liftgate switch and fuse No. 8.
  7. Reinstall fuse No. 8. If vehicle is equipped with a manual transmission, go to next step. If vehicle is equipped with an automatic transmission, place transmission in Park. Using DRB-II, read park/neutral switch position. If DRB-II does not display P/N POSITION: P/N, see appropriate G - TESTS W CODES article in the ENGINE PERFORMANCE Section.
  8. If DRB-II displays P/N POSITION: P/N, use DRB-II to read Vehicle Speed Signal (VSS). If DRB-II displays a vehicle speed more than VSS: 0 MPH, see appropriate G - TESTS W CODES article in the ENGINE PERFORMANCE Section. If DRB-II does not display a vehicle speed more than VSS: 0 MPH, go to next step.
  9. Using DRB-II in voltmeter mode, measure voltage of fused ignition feed circuit at fuse No. 8 (White wire). If voltage is less than 10 volts, repair open White wire.
  10. If voltage is more than 10 volts, disconnect liftgate ajar switch connector. Measure voltage of battery feed circuit at liftgate ajar switch connector terminal No. 6 (Black/Red wire). If voltage is less than 10 volts, repair open Black/Red wire.
  11. If voltage is more than 10 volts, measure voltage of fused ignition feed circuit at liftgate ajar switch connector terminal No. 4 (White wire). If voltage is less than 10 volts, repair open White wire.
  12. If voltage is more than 10 volts, turn ignition off. Disconnect body controller connectors. Body controller is located under left side of instrument panel. Check connector, and clean or repair connector as necessary.
  13. Using an external ohmmeter, measure resistance of enable circuit (Brown/Light Blue wire) between Blue body controller connector terminal No. 18 and liftgate switch connector terminal No. 1. If resistance is more than 5 ohms, repair open Brown/Light Blue wire.
  14. If resistance is less than 5 ohms, measure resistance of liftgate release output circuit (Light Green/Black wire) between fuse No. 4 and liftgate switch connector terminal No. 5. If resistance is more than 5 ohms, repair open Light Green/Black wire.
  15. If resistance is less than 5 ohms, reconnect liftgate switch. Connect a jumper wire between Blue body controller connector terminal No. 18 and ground. If liftgate solenoid operates, go to TEST 36C. If liftgate solenoid does not operate, replace body controller.
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