Tesla Model S Owners & Service Manuals

Tesla Model S: Slave Charger - LH - 1st Generation (Remove and Replace)

Tesla Model S (2012-2024) Service Manual / High Voltage System / Slave Charger - LH - 1st Generation (Remove and Replace)

Note: This procedure describes how to remove and install the 1st generation slave charger. If the vehicle is equipped with a 2nd generation slave charger, refer to procedure 44102102 (refer to procedure).

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 minimum rating of class 00 (500V) must be worn any time a high voltage cable is handled. Refer to Tech Note TN-15-92-003, "High Voltage Awareness Care Points" for additional safety information.

Warning: To avoid personal injury, eye protection must be worn while using compressed air.

Removal

Note: The slave charger is optional equipment. This procedure describes replacement of a failed slave charger. To install a slave charger in a vehicle that is only equipped with 1 charger, refer to Service Bulletin SB-12-44-005.

  1. Remove the HV junction box (refer to procedure).
  2. Disconnect the low voltage harness connector from the slave charger.

    Slave Charger - LH - 1st Generation (Remove and Replace)

  3. Remove the nuts (x4) that secure the charger to the body (torque 6.5 Nm).

    Slave Charger - LH - 1st Generation (Remove and Replace)

  4. Remove the bolt that secures the ground strap to the charger case (torque 6.5 Nm).
  5. Position the ground strap aside.
  6. Clamp both coolant hoses near the charger to minimize coolant loss.
  7. Remove the coolant plug from the inboard side of the replacement charger and have it ready before performing the next step.
  8. Note: Place suitable absorbent material around the affected area to absorb any possible fluid spillage. Tilt the inboard side of the charger upwards. Remove the coolant hose from the charger and immediately insert the coolant plug into the charger to stop coolant from spilling out.

    Slave Charger - LH - 1st Generation (Remove and Replace)

  9. Repeat steps 7-8 on the outboard coolant hose.
  10. Remove the slave charger.

    Slave Charger - LH - 1st Generation (Remove and Replace)

  11. If the charger is being shipped or stored, allow the coolant to drain from the charger, then use compressed air lightly to blow out any remaining coolant.

Caution: Do not exceed 25 PSI when using compressed air to blow out any remaining coolant.

Installation
  1. Installation procedure is the reverse of removal, except for the following:
  2. After the HV junction box and slave charger are reinstalled, restore power to the vehicle by reversing the Electrical Isolation procedure. Note: Do not reinstall the rear seat cushion yet.
  3. Connect a laptop with Toolbox to the Ethernet port and powertrain CAN bus.
  4. Use the Toolbox "Charger Config" panel to configure the master charger:
  5. Use the Toolbox "Resets" panel to reset the Gateway.
  6. Refill and bleed the cooling system (refer to procedure). Note: While the coolant air purge routine is running, check the charger coolant hose connections to make sure there is no leakage.
  7. Perform a full firmware update.
  8. If possible, charge the vehicle at above 40 A for several minutes and verify that there are no alerts.

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