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Home >> Chevrolet >> 2019 >> Spark LS, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 32 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Radio Information Display Malfunction (IOB) >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Blank Screen

  1. Ignition OFF/vehicle OFF and all vehicle systems OFF, disconnect the X1 harness connector at the P17 Info Display Module. It may take up to 2 min for all vehicle systems to power down.
  2. Test for less than 10 Ω between the following ground circuit terminals and ground:
    • terminal 9
    • terminal 10
    • If 10 Ω or greater 
    1. Test for less than 2 Ω in the ground circuits end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than, 2 Ω repair the open/high resistance in the ground connection.
    • If less than 10 Ω 
  3. Ignition ON/vehicle in Service Mode.
  4. Test for 5 V or greater between control circuit terminal 1 and ground.
    • If less than 5 V 
    1. Ignition OFF/vehicle 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 on 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 5 V or greater. 
  5. Disconnect the harness connector at the A22 Radio Controls.
  6. Test for infinite resistance between the P17 Info Display Module harness connector X1 terminal 3 and ground.
    • If less than infinite resistance repair the short to ground on the circuit.
    • If infinite resistance.
  7. Replace the P17 Info Display Module.

Touch Screen

  1. Ignition OFF/vehicle OFF and all vehicle systems OFF, disconnect the X1 harness connector at the P17 Info Display Module. It may take up to 2 min for all vehicle systems to power down.
  2. Ignition ON/vehicle in Service Mode.
  3. Test for 1.5 - 2 V between the signal circuit terminal 7 and ground.
    • If less than 1.5 V 
    1. Ignition OFF/vehicle OFF, disconnect the X2 harness connector at the A11 radio.
    2. Test for infinite resistance between the signal 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 on the signal 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 2 V 
    1. Ignition OFF/vehicle OFF, disconnect the X2 harness connector at the A11 Radio.
    2. Test for less than 1 V between the signal circuit and ground.
      • If greater than 1 V repair the short to voltage in the circuit.
      • If less than 1 V replace the A11 Radio.
    • If between 1.5 - 2 V 
  4. Replace the P17 Info Display Module
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