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Home >> Chevrolet >> 2011 >> Volt >> Repair and Diagnosis >> External Pages >> Different car >> Section 20 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Navigation System - Voice Recognition Malfunction >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2012 Chevrolet Volt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Vehicle OFF, disconnect the X2 harness connector at the K73 telematics communication interface module.
  2. Test for less than 10 Ω between the low reference circuit terminal 12 and ground.
    • If 10 Ω or greater 
    1. Vehicle OFF, disconnect the X4 harness connector at the A11 radio.
    2. Test for less than 2 Ω in the low reference 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 10 Ω 
  3. Vehicle in Service Mode, radio ON.
  4. Test for less than 1 V between the signal circuit terminal 6 and ground.
    • If 1 V greater 
    1. Vehicle OFF, disconnect the X4 harness connector at the A11 radio. Vehicle in Service Mode.
    2. Test for less than 1 V between the signal 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 1 V 
  5. Vehicle OFF, disconnect the X4 harness connector at the A11 radio.
  6. Test for infinite resistance between the circuits listed below and ground:
    • voice recognition signal circuit A11 radio X4 terminal 6
    • voice recognition low reference circuit A11 radio X4 terminal 16
    • If less than infinite resistance 

      Repair the short to ground on the circuit.

    • If infinite resistance 
  7. Test for less than 5 Ω between the terminals listed below:
    • A11 radio X4 terminal 6 and the K73 telematics communication interface module X2 terminal 6
    • A11 radio X4 terminal 16 and the K73 telematics communication interface module X2 terminal 12
    • If 5 Ω greater 

      Repair the open/high resistance in the circuit.

    • If less than 5 Ω 
  8. Replace the A11 radio. Connect all harness connectors.
    9. NOTE:

    Refer to the Navigation System Owners Manual for voice recognition use and commands.

  9. Begin voice recognition for the radio and clearly speak one of the available commands.
  10. Verify the infotainment system responds correctly to the command.
    • If the infotainment system does not respond correctly to the command 
    1. Clearly speak a different command.
    2. Verify the infotainment system responds correctly to the command.
      • If the infotainment system does not respond correctly to any commands, replace the K73 telematics communication interface module.
    • If the infotainment system responds correctly to the command 
  11. All OK
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