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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Instrument Panel System Displays And Gauges) >> Diagnostic Information and Procedures >> Trunk Ajar Indicator Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the rear compartment lid latch.
  2. Test for less than 1.0 ohm of resistance between the ground circuit terminal 3 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  3. Ignition ON, verify the Trunk Ajar message on the DIC is not displayed.
    • If the Trunk ajar message is displayed, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the BCM.
  4. Install a 3-amp fused jumper between the signal circuit terminal 1 and ground. Verify the Trunk Ajar message is displayed on the DIC.
    • If the Trunk Ajar message is not displayed, test the signal circuit terminal 1 for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM.
  5. If all circuits test normal, test or replace the rear compartment lid latch.
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