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Home >> GMC >> 2019 >> Terrain SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 137 (Cellular System, Entertainment System, And Navigation System - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> Radio Controls Malfunction (IOB) >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2018 GMC Terrain and 2018 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify DTC B123E is not set.
    • Go to next step: If DTC B123E is not set 
  2. Ignition ON/vehicle in Service Mode, A11 Radio ON.
  3. Verify that all radio controls operate and perform the correct function.
    • If all or some of the radio controls are inoperative 

      Refer to Circuit/System Testing.

    • Go to next step: If all radio controls operate and perform the correct function. 
  4. All OK.
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