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Home >> Chevrolet >> 2014 >> Spark EV >> Repair and Diagnosis >> Electrical >> Charging Systems >> Plug-In Charging >> Diagnostic Information and Procedures >> DTC P0CF4-P0CF6: Control Pilot Circuit(GME Only) >> Circuit/System Testing

Circuit/System Testing

WARNING:

High voltage enabling and disabling shall be only performed by High Voltage Qualified Technicians. The procedures for high voltage enabling/disabling can be found in the service instructions and must be strictly followed at all times. The usage of the Protocol High Voltage Disabling / Enabling is mandatory. The High Voltage Qualified Technician is responsible for the adherence to the manufacturer's service instructions as well as current national legal regulations.

Failure to follow the procedures exactly as written may result in serious injury or death.

Questions regarding training can be answered by your national training centre.

WARNING:

Any hybrid/EV battery pack replacement shall be performed by High Voltage Qualified Technicians only. The replacement procedure can be found in the service instruction and must be strictly followed at all times. The High Voltage Qualified Technician is responsible for adherence to the manufacturer's service instructions as well as current national legal regulations. If the hybrid/EV battery pack needs to be replaced contact the Technical Assistance Centre for further instructions prior removal of the battery pack.

  1. Vehicle OFF, disable the high voltage. Refer to High Voltage Disabling
  2. Fig 1: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM3549493Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The following tests are performed at the X98 Hybrid/EV Battery Charger Receptacle and not at the harness connector to the X98 Hybrid/EV Battery Charger Receptacle.

  3. Test for 100k Ω-4M Ω between the control pilot signal terminal 4 at the X98 Hybrid/EV Battery Charger Receptacle and ground.
    • If 4M Ω or greater 
    1. Disconnect the X2 harness connector from K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for 2 Ω in the control pilot 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 K114B Hybrid/EV Powertrain Control Module 2.
    • If less than 100k Ω 
    1. Disconnect the X2 harness connector from K114B Hybrid/EV Powertrain Control Module 2.
    2. Test for infinite resistance between the control pilot signal circuit and ground.
      • If less than infinite resistance, repair the short to ground in the circuit.
      • If infinite resistance, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • If within the specified range 
  4. Connect the 12 V battery. Vehicle in Service Mode.
  5. Test for less than 1 V between the control pilot signal terminal 4 at the X98 Hybrid/EV Battery Charger Receptacle and ground.
    • If 1 V or greater 
    1. Vehicle OFF, disconnect the X2 harness connector from K114B Hybrid/EV Powertrain Control Module 2. Vehicle in Service Mode.
    2. Test for less than 1 V between the control pilot signal circuit and ground.
      • If greater than 1 V, repair the short to voltage in the circuit.
      • If less than 1 V, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • If less than 1 V 
  6. Fig 2: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM3549493Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    The following tests are performed at the X98 Hybrid/EV Battery Charger Receptacle and not at the harness connector to the X98 Hybrid/EV Battery Charger Receptacle.

  7. Test for infinite resistance between control pilot signal circuit terminal 4 of the X98 Hybrid/EV Battery Charger Receptacle and the terminals listed below;
    • Terminal 1
    • Terminal 2
    • Terminal 3
    • Terminal 5
    • If less than infinite resistance 

      Repair the short between the circuits.

    • If infinite resistance 
  8. Replace the K114B Hybrid/EV Powertrain Control Module 2.