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Home >> Cadillac >> 2007 >> STS Base, 4.6 A, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 171 (Shift Lock Control System) >> Diagnostic Information and Procedures >> DTC B2710 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition OFF, disconnect the harness connector at the shift lock control solenoid.
  2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal E and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or open/high resistance. If the circuit tests normal, test or replace the shift lock control solenoid.
  3. Connect a test lamp between the B+ circuit terminal E and control circuit terminal K.
  4. Press and release the brake pedal several times. The test lamp should turn ON and OFF as commanded.
    • If the test lamp is always ON, test the control circuit for short to ground. If the circuit tests normal, replace the RCDLR.
    • If the test lamp is always OFF, test the control circuit for an open/high resistance or short to voltage. If the circuit test normal, replace the RCDLR.
  5. If all circuits test normal, test or replace the shift lock control solenoid.
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