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Circuit/System Testing

WARNING:

Ultracapacitors should not be opened, disassembled, crushed, burned, charged over 5V, or exposed to high temperatures greater than 81.6°C (179°F). Ultracapacitors contain acetonitrile. If ultracapacitor leaks or ruptures it will emit flammable liquid and vapor with an aromatic ether-like odor. Harmful if inhaled or absorbed through the skin. Causes respiratory tract, eye, and skin irritation. May be harmful if swallowed. Can cause target organ damage. Arcing may also occur when charged and shorted, resulting in molten metal splattering and arc-flash hazards. To reduce the risk of personal injury and/or vehicle damage:

  • Do not breath vapor or mist, assure adequate ventilation of area.
  • Do not ingest.
  • Do not eat, drink or smoke when using this product.
  • Avoid contact with eyes, skin and clothing. In case of exposure to ultracapacitor contents, wash affected area for at least 15 minutes with generous amounts of water and seek medical attention.
  • Keep away from heat sparks and flame.
  • Remove jewelry before handling.
  • Follow diagnostic and repair procedures to discharge the ultracapacitor and disconnect the negative battery terminal when requested.
NOTE:

You must perform Circuit/System Verification before Circuit/System Testing.

DTC P1079

  1. Discharge the C10 Stop/Start Capacitor by commanding Discharge Stop/Start Capacitor with a scan tool. Wait at least 3 min to allow the capacitor to discharge.
  2. Ignition OFF, disconnect the C1 Battery (disconnect negative cable of the battery).
  3. Disconnect the X5 harness connector at the K176 Stop/Start Capacitor Control Module.
  4. Test for less than 10 Ω between the ground circuit terminal A and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit 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 
  5. Reconnect the X5 harness connector at the K176 Stop/Start Capacitor Control Module.
  6. Reconnect the C1 Battery.
  7. Ignition OFF, disconnect the X1 harness connector at the K176 Stop/Start Capacitor Control Module, Ignition ON
  8. Test for less than 2.5 V between the positive battery terminal and B+ circuit terminal 6 at the K176 Stop/Start Capacitor Control Module with the ignition in the ON position.
    • If the difference is 2.5 V or greater and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the difference is 2.5 V or greater and the circuit fuse is open 
    1. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K176 Stop/Start Capacitor Control Module.
    • If the difference is less than 2.5 V 
  9. Ignition OFF, measure and record the battery voltage at the battery terminals.
  10. Verify the difference between the recorded value and scan tool Ignition 1 Signal parameter value in the engine control module is less than 2.5 V.
    • If the difference is 2.5 V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the ignition 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 ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace K20 Engine Control Module
    • If the difference is less than 2.5 V 
  11. Replace the K176 Stop/Start Capacitor Control Module.

DTC P107C

  1. Discharge the C10 Stop/Start Capacitor by commanding Discharge Stop/Start Capacitor with a scan tool. Wait at least 3 min to allow the capacitor to discharge.
  2. Ignition OFF, disconnect the C1 Battery (disconnect negative cable of the battery).
  3. Disconnect the X5 harness connector at the K176 Stop/Start Capacitor Control Module.
  4. Test for less than 10 Ω between the ground circuit terminal A and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit 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 
  5. Reconnect the X5 harness connector at the K176 Stop/Start Capacitor Control Module.
  6. Reconnect the C1 Battery.
  7. Ignition OFF, disconnect the X2 harness connector at the K176 Stop/Start Capacitor Control Module, Ignition ON
  8. Test for less than 2.5 V between the positive battery terminal and B+ circuit terminal 1 at the K176 Stop/Start Capacitor Control Module with the ignition in the ON position.
    • If the difference is 2.5 V or greater and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the difference is 2.5 V or greater and the circuit fuse is open 
    1. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K176 Stop/Start Capacitor Control Module.
    • If the difference is less than 2.5 V 
  9. Ignition OFF, measure and record the battery voltage at the battery terminals.
  10. Verify the difference between the recorded value and scan tool Ignition 1 Signal parameter value in the engine control module is less than 2.5 V.
    • If the difference is 2.5 V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the ignition 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 ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace K20 Engine Control Module
    • If the difference is less than 2.5 V 
  11. Replace the K176 Stop/Start Capacitor Control Module.

DTC P107F

  1. Discharge the C10 Stop/Start Capacitor by commanding Discharge Stop/Start Capacitor with a scan tool. Wait at least 3 min to allow the capacitor to discharge.
  2. Ignition OFF, disconnect the C1 Battery (disconnect negative cable of the battery).
  3. Disconnect the X5 harness connector at the K176 Stop/Start Capacitor Control Module.
  4. Test for less than 10 Ω between the ground circuit terminal A and ground.
    • If 10 Ω or greater 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the ground circuit 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 
  5. Reconnect the X5 harness connector at the K176 Stop/Start Capacitor Control Module.
  6. Reconnect the C1 Battery.
  7. Ignition OFF, disconnect the X1 harness connector at the K176 Stop/Start Capacitor Control Module, Ignition ON
  8. Test for less than 2.5 V between the positive battery terminal and B+ circuit terminal 7 at the K176 Stop/Start Capacitor Control Module with the ignition in the ON position.
    • If the difference is 2.5 V or greater and the circuit fuse is good 
    1. Ignition OFF.
    2. Test for less than 2 Ω in the B+ circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, verify the fuse is not open and there is voltage at the fuse.
    • If the difference is 2.5 V or greater and the circuit fuse is open 
    1. Test for infinite resistance between the B+ circuit and ground.
      • If less than infinite resistance, repair the short to ground on the circuit.
      • If infinite resistance, replace the K176 Stop/Start Capacitor Control Module.
    • If the difference is less than 2.5 V 
  9. Ignition OFF, measure and record the battery voltage at the battery terminals.
  10. Verify the difference between the recorded value and scan tool Ignition 1 Signal parameter value in the engine control module is less than 2.5 V.
    • If the difference is 2.5 V or greater 
    1. Ignition OFF, disconnect the X1 harness connector at the K20 Engine Control Module.
    2. Test for infinite resistance between the ignition 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 ignition circuit end to end.
      • If 2 Ω or greater, repair the open/high resistance in the circuit.
      • If less than 2 Ω, replace K20 Engine Control Module
    • If the difference is less than 2.5 V 
  11. Replace the K176 Stop/Start Capacitor Control Module.
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