Circuit/System Testing
- 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.
- Perform the High Voltage Disabling procedure.
- Remove the 3-phase cables from the K59 Starter/Generator Control Module.
- Test for infinite resistance between the 3-phase cable terminals listed below and ground for each phase of the drive motor generator 3-phase cable:
- X3 phase U terminal A
- X3 phase V terminal B
- X3 phase W terminal C
- If less than infinite resistance, test each phase of the drive motor generator 3-phase cable for a short to ground. If the cables test normal, replace the A15 Starter/Generator.
- Disconnect the 3-phase cables from the A15 Starter/Generator.
- Test for infinite resistance between the 3-phase circuits listed below for each phase of the drive motor generator 3-phase cable:
- Phase U and phase V
- Phase V and phase W
- Phase W and phase U
- If less than infinite resistance, replace the drive motor generator 3-phase cable.
- Replace A15 Starter/Generator and retest for the DTC. If the DTC resets, replace the K59 Starter/Generator Control Module.
- Read the Hybrid/EV Battery Pack State of Charge parameter using a scan tool.
- If the Hybrid/EV Battery Pack State of Charge is less than 30 percent
Perform the Hybrid/EV Battery Low State of Charge Recovery .
- Go to next step: If Hybrid/EV Battery Pack State of Charge is 30 percent or greater
- If the Hybrid/EV Battery Pack State of Charge is less than 30 percent
- All OK.
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 will perform the following tasks:
Failure to follow the procedures exactly as written may result in serious injury or death.
NOTE:
A Hybrid/EV Battery Pack with low state of charge may result in a low 12 V battery condition and possible vehicle stall. Always perform the recovery procedure before returning the vehicle to the customer.