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Home >> Pontiac >> 2009 >> Vibe Base, 2.4 0, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 22 (Door Lock System & Door Handles) >> Diagnostic Information and Procedures >> DTC B2503 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 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. Ignition ON, verify the scan tool Rear Closure Ajar Sw parameter is Inactive.
    • If not the specified value, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the BCM.
  3. Install a 3A fused jumper between the signal circuit terminal 1 and the ground circuit terminal 3. Verify the scan tool Rear Closure Ajar Sw parameter is Active.
    • If not the specified value, test the signal circuit for a short to voltage or and open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, test or replace the rear compartment lid latch.
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