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Charging Malfunction

  1. Connect drive motor battery charger cable to household power outlet, but not the battery charger receptacle.
  2. After 25 seconds, verify drive motor battery charger cable LEDs illuminate solid green.
    • If drive motor battery charger cable LEDs do not illuminate solid green 
    1. Connect a known good drive motor battery charger cable to the same household power outlet.
      • If known good drive motor battery charger cable LEDs illuminate solid green, have the service provider check for high frequency noise on the dedicated home outlet. If no high frequency noise is found, replace drive motor battery charger cable.
      • If known good drive motor battery charger cable LEDs do not illuminate solid green, have the service provider inspect the household power outlet for insufficient voltage, high frequency noise or open/high resistance.
    • If drive motor battery charger cable LEDs do illuminate solid green 
  3. Test for greater than 1 V between the low voltage circuits listed below on drive motor battery charger cable.
    Fig 1: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM3631526Courtesy of GENERAL MOTORS COMPANY
    • Proximity status signal circuit terminal D
    • Control pilot signal circuit terminal B
    • If less than 1 V 

      Replace drive motor battery charger cable.

    • If greater than 1 V 
  4. Vehicle OFF and all vehicle systems OFF. It may take up to 2 minutes for all vehicle systems to power down. Test for 100k Ω-4M Ω between the control pilot signal terminal B at the X98 Hybrid/EV Battery Charger Receptacle and ground.
    Fig 2: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM2874492Courtesy 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.
    • 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 
  5. Test for less than 1 V between the control pilot signal terminal B at the X98 Hybrid/EV Battery Charger Receptacle and ground.
    Fig 3: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM2874492Courtesy of GENERAL MOTORS COMPANY
    • If greater than 1 V 
    1. Disconnect the X2 harness connector from K114B Hybrid/EV Powertrain Control Module 2
    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. Vehicle in Service Mode.
  7. Test for 4.2-4.8 V between the proximity status signal terminal D at the X98 Hybrid/EV Battery Charger Receptacle and ground.
    Fig 4: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM2874492Courtesy of GENERAL MOTORS COMPANY
    • If less than 4.2 V 
    1. Vehicle OFF, test for infinite resistance between the proximity status signal circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance
    2. Disconnect the X2 harness connector from K114B Hybrid/EV Powertrain Control Module 2.
    3. Test for less than 2 Ω in the proximity status 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 greater than 4.8 V 
    1. Disconnect the X2 harness connector from K114B Hybrid/EV Powertrain Control Module 2
    2. Test for 0 V between the proximity status signal circuit and ground.
      • If greater than 0 V, repair the short to voltage in the circuit.
      • If 0 V, replace the K114B Hybrid/EV Powertrain Control Module 2.
    • If within the specified range 
  8. Vehicle OFF, disconnect the X3 harness connector from T18 Battery Charger.
  9. Test for infinite resistance between the terminals listed below at the X98 Hybrid/EV Battery Charger Receptacle:
    Fig 5: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM2874492Courtesy of GENERAL MOTORS COMPANY
    • 110/220 V A/C Line 1 terminal E and 110/220 V A/C Neutral Line 2 terminal A
    • 110/220 V A/C Line 1 terminal E and 110/220 V A/C Ground terminal C
    • 110/220 V A/C Line 1 terminal E and Control pilot signal circuit terminal B
    • 110/220 V A/C Line 1 terminal E and Proximity status signal circuit terminal D
    • 110/220 V A/C Neutral Line 2 terminal A and 110/220 V A/C Ground terminal C
    • 110/220 V A/C Neutral Line 2 terminal A and Control pilot signal circuit terminal B
    • 110/220 V A/C Neutral Line 2 terminal A and Proximity status signal circuit terminal D
    • 110/220 V A/C Ground terminal C and Control pilot signal circuit terminal B
    • Control pilot signal circuit terminal B and Proximity status signal circuit terminal D
      • If less than infinite resistance 

        Repair the short between the circuits.

    • If infinite resistance 
  10. Disconnect the harness connector from the X98 Hybrid/EV Battery Charger Receptacle.
  11. Test for 2.56-2.84k Ω between the 110/220 V A/C Ground terminal C and Proximity status signal circuit terminal D at the X98 Hybrid/EV Battery Charger Receptacle.
    Fig 6: X98 Hybrid/EV Battery Charger Receptacle And Terminals
    GM2874492Courtesy of GENERAL MOTORS COMPANY
    • If not within the specified range 

      Replace the X98 Hybrid/EV Battery Charger Receptacle.

    • If within the specified range 
  12. Test for infinite resistance between the 110/220 V A/C Ground terminal C and Proximity status signal circuit terminal D of the harness connector.
    NOTE: This test is performed on the vehicle side of the harness connector.
    • If less than infinite resistance 

      Repair the short between the circuits.

    • If infinite resistance 
  13. Replace the T18 Battery Charger.
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