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Test 146C - Repairing Key In Ignition Circuit

NOTE: Perform TEST 146A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-3A - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Disconnect ignition switch connector. See Figure . Ensure connector is clean and undamaged. Using scan tool in ohmmeter mode, measure resistance at terminal No. 4 (Black wire) on ignition switch connector. If resistance is 5 ohms or greater, repair open Black wire. If resistance is less than 5 ohms, go to next step.
  2. Connect jumper wire between terminals No. 4 (Black wire) and No. 6 (Light Blue wire) on ignition switch connector. Using scan tool, read key in ignition switch status. If scan tool displays KEY IN IGN CLOSED, replace ignition switch. If scan tool does not display KEY IN IGN CLOSED, go to next step.
  3. Backprobe jumper wire between terminal No. 20 (Light Blue wire) on Body Control Module (BCM) connector and ground. Using scan tool, read key in ignition switch status. If scan tool displays KEY IN IGN CLOSED, repair open Light Blue wire. If scan tool does not display KEY IN IGN CLOSED, go to next step.
  4. Turn ignition switch to OFF position. Disconnect BCM Bone connector. Ensure connector is clean and undamaged. If any terminals are damaged, repair connector as necessary. If terminals are okay, replace BCM.
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