High Voltage System Inspection
High Voltage System Inspection
High Voltage Circuit Impact Detection
The high voltage circuit impact detection (HVCID) sensor monitors for a vehicle collision that may have intruded into the area occupied by high voltage components and/or wiring. When the HVCID senses a vehicle collision has occurred, the Serial Data Gateway Module (SDGM) transmits an HVCID collision detected message to the Hybrid Powertrain Control Module (HPCM). The HPCM reacts to the HVCID collision detected message by commanding the high voltage contactor relays open and storing a DTC. The DTC will remain Current until cleared by a special selection of the scan tool. Prior to clearing the HVCID collision detected DTC, a complete inspection of the high voltage (HV) system and components must be performed.
Inspection Procedure
Danger: 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:
* 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.
* Failure to follow the procedures exactly as written may result in serious injury or death.
Perform the high voltage disable procedure at the drive motor generator battery cable connections. Refer to High Voltage Disabling.
^ If vehicle damage does not allow access to the high voltage manual disconnect, disconnect the 12V battery and remove the damaged portion of the vehicle until such time as the HV manual disconnect can be removed and the high disable procedure can be completed.
1. Perform a visual inspection of the HV DC 300V cables between the PIM and the drive motor generator battery assembly. Inspect for pinched, cut or frayed cables.
^ Record any observed damage and continue.
2. Perform a visual inspection of the HV DC 300V cables between the PIM and the air conditioning compressor. Inspect for pinched, cut or frayed cables.
^ Record any observed damage and continue.
3. Perform a visual inspection of the 3 phase cables between the PIM and the transmission case. Inspect for pinched, cut or frayed cables. Inspect the conduit for kinks or dents.
^ Record any observed damage and continue.
4. Perform a visual inspection of the 42 V power steering cables between the accessory DC power control module (APM) and the power steering control module (PSCM). Inspect for pinched, cut or frayed cables.
^ Record any observed damage and continue.
5. Perform a visual inspection of the drive motor generator control module assembly. Inspect the assembly for cracks, dents or other physical damage.
^ Record any observed damage and continue.
6. Perform a visual inspection of the air conditioning compressor assembly. Inspect the assembly for cracks, dents or other physical damage.
^ Record any observed damage and continue.
7. Perform a visual inspection of the transmission assembly. Inspect the assembly for cracks, dents or other physical damage.
^ Record any observed damage and continue.
8. Perform a visual inspection of the drive motor generator battery assembly. Inspect the assembly for cracks, dents or other physical damage.
^ Record any observed damage and continue.
9. Replace all components identified as damaged.
^ Clear the HVCID collision detected DTC only after all high voltage components identified as damaged have been replaced.
10. Perform the HV Enable Procedure. Refer to High Voltage Enabling.
11. Ignition ON, clear the HVCID collision detected DTC.
12. Ignition OFF, wait 1 minute.
13. Ignition ON, insure high voltage is enabled and that no hybrid DTCs are set.
14. Ignition OFF, wait 1 minute.
15. Ignition ON, inspect that HV isolation DTCs P1AE7, P1AF0 and P1AF2 have ran and passed.
^ Further vehicle service should not be attempted until DTCs P1AE7, P1AF0 and P1AF2 have ran and passed.