Circuit/System Testing

WARNING:

Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection. Personal Protection Equipment (PPE) and proper procedures must be followed.

The High Voltage Disabling procedure includes the following steps:

Identify how to disable high voltage.
Identify how to test for the presence of high voltage.
Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures must be followed.

Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:

Safety glasses with appropriate side shields when within 15 meters (50 feet) of the vehicle, either indoors or outdoors.
Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves with leather protectors at all times when working with the high voltage battery assembly, whether the system is energized or not.

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

Clear DTC, connect a known good drive motor battery charger cable to vehicle and household supply voltage.
Verify DTC P1EE6 is set.
- If DTC P1EE6 is not set
  Replace customer's drive motor battery charger cable.
- If DTC P1EE6 is set
Vehicle OFF, disable the high voltage at the T18 battery charger. Refer to High Voltage Disabling .

Fig 1: X98 Hybrid/EV Battery Charger Receptacle And Terminals

Courtesy of GENERAL MOTORS COMPANY

Test for infinite resistance between the 110/220 V AC circuit terminals listed below and ground:
- T18 battery charger terminal A X3
- T18 battery charger terminal C X3
- If less than infinite resistance
1. Disconnect the harness connector to the X98 hybrid/EV battery charger receptacle.
2. Test for infinite resistance between the 110/220 V AC circuit terminal and ground.
  - If infinite resistance, repair the short to ground in the circuit.
  - If less than infinite resistance, replace the X98 hybrid/EV battery charger receptacle.
- If infinite resistance

Fig 2: X98 Hybrid/EV Battery Charger Receptacle And Terminals

Courtesy of GENERAL MOTORS COMPANY

Test for infinite resistance between the 110/220 V AC circuit terminals listed below:
- T18 battery charger terminal A X3
- T18 battery charger terminal B X3
- T18 battery charger terminal C X3
- If less than infinite resistance
1. Disconnect the harness connector to the X98 hybrid/EV battery charger receptacle.
2. Test for infinite resistance between the 110/220 V AC circuit terminals.
  - If infinite resistance, repair the short to ground in the circuit.
  - If less than infinite resistance, replace the X98 hybrid/EV battery charger receptacle.
- If infinite resistance

Fig 3: X98 Hybrid/EV Battery Charger Receptacle And Terminals

Courtesy of GENERAL MOTORS COMPANY

Test for less than 10 Ω between the 110/220 V AC circuit terminals listed below:
- T18 battery charger terminal A X3 and X98 hybrid battery charger receptacle E
- T18 battery charger terminal B X3 and X98 hybrid battery charger receptacle C
- T18 battery charger terminal C X3 and X98 hybrid battery charger receptacle A
- If greater than the specified range
1. Disconnect the harness connector to the X98 hybrid/EV battery charger receptacle.
2. Test for less than 2 Ω the 110/220 V AC circuit end to end.
  - If 2 Ω or greater, repair the open/high resistance in the circuit.
  - If less than 2 Ω, replace the X98 hybrid/EV battery charger receptacle.
- If within the specified range
Replace the T18 battery charger.