LEMON Manuals: Even more car manuals for everyone
Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 67 (Circuit Testing Procedures - Non-DTC-Based Diagnostics - 500 - Electric) >> Diagnosis And Testing >> Loss Of Isolation Check >> Theory Of Operation

Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The Loss of Isolation Check procedure is used to check the integrity of the high-voltage (HV) circuits. When loss of isolation (LOI) occurs, the HV system is no longer isolated, meaning a short circuit between the vehicle's HV circuits, and chassis ground has occurred.

NOTE:

The high voltage wiring cables are not serviceable and must be replaced.

WARNING:

When performing any repairs that involve contact with high voltage components or systems, the technician performing repairs on the vehicle must verify that the system remains powered down during high voltage repairs.

  • This must be done by removing the service disconnect.
  • The high voltage check out procedure must also be performed to ensure that the vehicle is properly powered down.
  • The technician must know the whereabouts of the service disconnect throughout the repair.
  • The technician must ensure that no one reconnects the service disconnect while service is being performed.
  • The technician must recheck that the service disconnect has not been reinstalled in cases where the vehicle was unattended.

Perform the High-Voltage Power Down procedure. Refer to ELECTRIC VEHICLE CONTROL SYSTEM, STANDARD PROCEDURE .

scientia non olet · About LEMON Manuals