Diesel Data: Automotive Repair
Home >> Chevrolet >> 2011 >> Volt L4-1.4L Elect >> Repair and Diagnosis >> Hybrid Drive Systems >> Service and Repair >> Procedures >> High Voltage Enabling

High Voltage Enabling




High Voltage Enabling

Danger: Ensure all High Voltage safety procedures are followed. Failure to follow the procedure exactly as written may result in serious injury or death.


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


* Safety glasses with appropriate side shields when within 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 at all times when working with the high voltage battery assembly, whether the system is energized or not.


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


Danger: The Volt Battery Pack will utilize an exchange program. Please consult the most recent revision of bulletin/PI #PIP4841, available in Service Information (SI), for a list of approved Volt Battery Pack service procedures. Components that may be removed and serviced without exchanging the complete battery pack are identified in the bulletin/PI. Please contact the GM Technical Assistance Center (1-877-446-8227) if you have any questions.


Review the high voltage safety information prior to performing the High Voltage Enabling procedure. Refer to High Voltage Safety High Voltage Safety.

1. Ensure that the 12 V battery is disconnected.

Note: Always tighten the high voltage fasteners to the specified torque. Insufficient or excessive torque will cause malfunctions or damage.

2. After finishing work on the high voltage systems and before reinstalling the high voltage manual disconnect lever, inspect for the following:

• Verify that all tools or loose components have been removed.
• Verify high voltage system integrity and that all connectors are installed.
• Verify that all high voltage interlock circuit connectors and covers are installed.

3. Install the manual disconnect lever. Refer to Drive Motor Battery High Voltage Manual Disconnect Lever Replacement (Housing) Drive Motor Battery High Voltage Manual Disconnect Lever Replacement (Housing).
4. Connect the 12 V battery. Refer to Battery Negative Cable Disconnection and Connection Battery Negative Cable Disconnection and Connection.
5. Start the engine, then turn the ignition OFF.
6. Ignition ON, clear all DTC Information with a scan tool.
7. Ignition OFF wait 2 minutes.
8. Ignition ON, verify with a scan tool no DTCs are set.

• If DTCs are set go to appropriate DTC information. Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.

9. Start and idle the engine for 2 minutes.
10. Ignition OFF wait 5 minutes.
11. Ignition ON, verify with the scan tool the Traction Power Inverter Module and Hybrid Powertrain Control Module 2 DTC Information that the following DTCs have Ran Since Code Clear and have not set:

* Motor position sensor learn DTCs P0C17 and P0C18 and tbd DTCs to be entered here.
* Contactor DTCs P0AD9, P0ADD, P0D0A, P0D11, P0AE4, and P1EBC.
* Discharge and Pre-charge DTCs P0C76, P0C77, P0C78 and P0AFB.
* High voltage loss of isolation DTCs P0AA6, P1AE6 and P1F0E.

• If the DTCs have Ran and Passed, test drive the vehicle and verify no DTCs are set.
• If the DTCs are set, go to the appropriate DTC information. Refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
• If the DTCs have Not Ran Since Code Clear, review and operate the vehicle according to the applicable DTC Conditions for Running and ensure the DTCs run and pass.

Diesel-Data.com