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Home >> Chevrolet >> 2016 >> Caprice 6.0L Eng VIN 2 >> Repair and Diagnosis >> External Pages >> Different car >> Section 72 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Radio Controls Malfunction >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2015 Chevrolet Caprice. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE:

    Perform the Circuit/System Verification before proceeding with Circuit/System Testing.

  1. Ignition OFF, disconnect the X2 harness connector at the P17 Info Display Module.
  2. Test for less than 20 Ω between the data shield circuit terminal 6 and ground.
    • If 20 Ω or greater 
    1. Ignition OFF, disconnect the X1 connector at the A11 Radio.
    2. Test for less than 2 Ω in the data shield 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 less than 20 Ω 
  3. Ignition ON.
  4. Test for 2-3 V between the serial data circuit terminals listed below and ground.
    • terminal 1
    • terminal 2
    • If less than 2 V 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio.
    2. Test for infinite resistance between the serial data 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 serial data 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 greater than 3 V 
    1. Ignition OFF, disconnect the X1 harness connector at the A11 Radio. Ignition ON.
    2. Test for less than 1 V between the serial data 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 between 2-3 V 
  5. Replace the P17 Info Display Module. Connect all harness connectors.
  6. Ignition ON, radio ON.
  7. Verify that all radio controls operate and perform the correct function.
    • If the radio controls still malfunction. 

      Replace the A11 Radio.

    • If all radio controls operate and perform the correct function. 
  8. All OK
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