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Test 20A - Seat Belt Warning Light

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
  1. Using DRB-II, stop sequential light test. Ensure left front seat belt is fastened. Using DRB-II, read seat belt switch status. If DRB-II displays CIRCUIT OPEN, go to step 4). If DRB-II does not display CIRCUIT OPEN, disconnect seat belt warning switch connector. See Fig 1 .
  2. Check connector condition, and clean or repair connector as necessary. If DRB-II displays CIRCUIT OPEN, replace seat belt switch. Perform VERIFICATION PROCEDURE VER-1. If DRB-II does not display CIRCUIT OPEN, turn ignition off. Disconnect both Body Control Module (BCM) connectors. BCM is located behind right side kick panel.
  3. Check condition of connectors, and clean or repair connectors as necessary. Using DRB-II in ohmmeter mode, check resistance on terminal No. 14 (Light Green/Red wire) of BCM Black connector. If resistance is less than 5 ohms, repair short to ground in Light Green/Red wire. Perform VERIFICATION PROCEDURE VER-1. If resistance is more than 5 ohms, replace BCM. Perform VERIFICATION PROCEDURE VER-1.
    Fig 1: Locating Seat Belt Switch Connector
    G92I04832
  4. If DRB-II displayed CIRCUIT OPEN in step 1), unfasten left front seat belt. If DRB-II displays CIRCUIT CLOSED, replace electronic instrument cluster. Perform VERIFICATION PROCEDURE VER-1. If DRB-II does not display CIRCUIT CLOSED, disconnect seat belt switch connector. See Fig 1 . Connect jumper wire between terminal No. 1 (Light Green/Red wire) and terminal No. 2 (Black wire) of seat belt warning switch connector.
  5. If DRB-II displays CIRCUIT CLOSED, replace left front seat belt switch. Perform VERIFICATION PROCEDURE VER-1. If DRB-II does not display CIRCUIT CLOSED, connect jumper wire between terminal No. 1 (Light Green/Red wire) of seat belt switch connector and ground. If DRB-II displays CIRCUIT CLOSED, repair open Black wire. Perform VERIFICATION PROCEDURE VER-1.
  6. If DRB-II did not display CIRCUIT CLOSED, disconnect jumper wire. Turn ignition off and access Body Control Module (BCM). DO NOT  disconnect BCM connector. Connect jumper wire between terminalNo. 14 (Light Green/Red wire) of BCM Black connector and ground.
  7. If DRB-II displays CIRCUIT CLOSED, repair open Light Green/Red wire. Perform VERIFICATION PROCEDURE VER-1. If DRB-II does not display CIRCUIT CLOSED, go to next step.
  8. Turn ignition off. Disconnect both BCM connectors. Check condition of connectors, and clean or repair connectors as necessary. Perform VERIFICATION PROCEDURE VER-1. If connector condition is okay, replace BCM. Perform VERIFICATION PROCEDURE VER-1.
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