Tesla Model S: Troubleshooting
Charging does not start. The green "Ready" light in the software
application is dimmed.
- Check that the HV power supply is plugged in and turned
on.
- Check the connections at the rear of the
charger/interface control box.
Discharging does not start.
- Review the status box in the software application for
information that could be helpful for troubleshooting.
- Check that the discharger box is plugged in and its
power switch is on.
- Check that the load bank control cable is connected to
the rear of the charger/interface control box.
The software application displays "Pack Communication Error!"
- The emergency stop is engaged.
- Check the LV connector to the battery pack.
The software application displays the "Safety Fault" light.
- If the emergency stop is engaged then disengaged, the HV
battery is reset. The software application reports a safety
fault until the HV battery has completed all internal safety
checks. Wait until the "Safety Fault" light is dimmed before
continuing.
The software application status box displays HV connection
errors.
- Check for faulty HV connections.
- Check for an open HVIL connection. Make sure all
connections are fully seated--a plug might appear to be
inserted without being fully seated.
The software application displays the "BMS Fault" light.
- Make sure the system is idle (select the Stop button in the
software application if the pack is charging or discharging).
- Engage the emergency stop switch, then disengage it.
- Close the "Pack Communication Error!" warning in the software
application.
- Wait until the "Safety Fault" light is dimmed, then try to
charge or discharge the battery.
- If the BMS Fault light is displayed again, contact Service
Engineering for assistance.
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Special tools required for this procedure:
Supplier
Part Number
Description
Tesla
1057671-
Warning: Only technicians who have been trained in High
Voltage Awareness are permitted to perform this procedure. Proper
personal protective equipment (PPE) and insulating HV gloves with a
SEE MORE:
Removal
Open the hood for access.
Carefully release the clips (x14) that secure the hoodliner to
the hood.
Warning: To avoid personal injury, eye protection
must be worn when performing this operation.
Tesla determines how, when, and where to send updates
to vehicles based on various factors unique to each
release. You can choose how quickly and often you
receive software updates. To change your preference,
touch Controls > Software > Software Update
Preferences and choose either of the