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HOMESERVICE MANUALSCHEVROLET2019TRAX PREMIER, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 6 (ENGINE COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P2600-P2603CIRCUIT/SYSTEM TESTING
2019 Chevrolet Trax Premier, AWD

Circuit/System Testing

2019 Chevrolet Trax Premier, AWDSECTION Circuit/System Testing
WARNING: This page is about a different car, the 2018 Chevrolet Trax and 2018 Buick Encore. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION:

Use the connector test adapter kit EL-35616-F for any test that requires probing the following items:

  • The control module harness connectors
  • The electrical center fuse/relay cavities
  • The component terminals
  • The component harness connector

Using this kit will prevent damage caused by the improper probing of connector terminals.

    NOTE:

    Refer to Diagnostic Aids before performing the Circuit/System Testing.

  1. Ignition OFF, disconnect harness connector X2 at the K20 engine control module.
  2. Connect a test lamp between terminal X2-45 and ground.
    3. NOTE:
    • A DMM connected between the test lamp probe and ground will measure 5 - 6 V if the test lamp illuminates with low intensity. The voltage will measure near B+ if the test lamp illuminates with bright intensity.
    • The values listed above are based on the use of the J-35616-210 test lamp, or a comparable test lamp that has approximately 30 Ξ© of internal resistance.
  3. Ignition ON, connect a fused jumper wire between the powertrain relay control circuit terminal X2-58 and ground. The test lamp should illuminate with low intensity.
    • If the test lamp does not illuminate, test the auxiliary coolant pump relay control circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the X50A fuse block.
    • If the test lamp illuminates with bright intensity, test the auxiliary coolant pump relay control circuit for a short to voltage. If the circuit tests normal, test or replace the X50A fuse block.
  4. If all circuits/connections test normal, replace the K20 engine control module.
RENDER: 1.0x

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When to See a Mechanic

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

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