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Home >> Suzuki >> 2009 >> XL7 Limited, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Diagnostic Information and Procedures >> DTC P0571: Cruise Control Brake Switch Circuit >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the X1 harness connector at the ECM.
  2. Connect a test lamp between the signal circuit terminal 9 and ground.
  3. Ignition ON, press and release the brake pedal. Verify the test lamp turns ON and OFF when pressing and releasing the brake pedal.
    • If the test lamp is always ON, test the signal circuit for a short to voltage. If the circuit tests normal, replace the BCM.
    • If the test lamp is always OFF, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
  4. If all circuits test normal, replace the ECM.
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