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HOMESERVICE MANUALSCHEVROLET2013EQUINOX LS, AWD, GASREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTINFOTAINMENTCELLULAR SYSTEM, ENTERTAINMENT SYSTEM, AND NAVIGATION SYSTEMDIAGNOSTIC INFORMATION AND PROCEDURESDTC B1287CIRCUIT/SYSTEM TESTING
2013 Chevrolet Equinox LS, AWD, Gas

Circuit/System Testing

2013 Chevrolet Equinox LS, AWD, GasSECTION Circuit/System Testing
    NOTE:

    To prevent misdiagnosis, the door chime must be OFF during testing. Ensure the driver door latch is closed during testing.

  1. Ignition OFF, disconnect the X1 harness connector at the T3 amplifier. Ignition ON, A11 radio ON, mute ON.
  2. Test for 7.5-8.5 V between the control circuit terminal 16 and ground.
    • If greater than 8.5 V 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 radio. Ignition ON.
    2. Test for less than 1 V between the control circuit and ground.
      • If 1 V or greater, repair the short to voltage on the circuit.
      • If less than 1 V, replace the A11 radio.
    • If less than 7.5 V 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 radio.
    2. Test for infinite resistance between the control circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    3. Test for less than 2 Ω in the control circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace the A11 radio.
    • If between 7.5-8.5 V 
  3. A11 radio ON, mute OFF.
  4. Test for less than 1 V between the control circuit terminal 16 and ground.
    • If 1 V or greater 

      Replace the A11 radio.

    • If less than 1 V 
  5. Test or replace the T3 amplifier.
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.