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Home >> Cadillac >> 2009 >> STS Base, 4.6 A, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 143 (Keyless Entry System & Remote Functions) >> Diagnostic Information and Procedures >> DTC B2961 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the ignition switch.
  2. Ignition ON, verify the scan tool Authentication Switch parameter is Inactive.
    • If not the specified value, test the signal circuit terminal 5 for a short to voltage. If the circuit tests normal, replace the RCDLR.
  3. Install a 3A fused jumper wire between the signal circuit terminal 5 and B+. Verify the scan tool Authentication Switch parameter is Active.
    • If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the RCDLR.
  4. If all circuits tests normal, test or replace the ignition switch.
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