Tesla Model S: DCDC Converter - 1st Generation (Remove and Replace)
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 or equipment damage from
electrostatic discharge, an ESD wrist strap must be worn while
carrying out this procedure.
Removal
- Perform the vehicle electrical isolation procedure (refer
to procedure).
- Remove the front RH upper wheel arch liner (refer to procedure).
- Clamp the DCDC converter feed and return coolant hoses.
- Position a container to collect the coolant.
- Release the clips (x2) that secure the feed and return coolant
hoses to the DCDC converter. Release the hoses from the converter.
Caution: Plug pipe connections to prevent ingress of
moisture or dirt.
Note: Note installed position of components before
removal.
- Remove the nut and washers that secure the 12V ground terminal
to the DCDC converter (torque 16 Nm). Release the harness and move
it aside.
- Release the DCDC converter 12V positive terminal insulation
cover.
- Remove the nut and washers securing the 12V positive terminal to
the DCDC converter (torque 9 Nm). Release the harness and move it
aside.
- Release the clip that secures the harness to the DCDC converter.
Warning: Proper personal protective equipment (PPE) and
insulating HV gloves with a minimum rating of class 00 (500V) must
be worn while performing the remainder of this procedure.
Warning: Ensure that the multimeter and leads are capable
of handling at least 500V.
- Remove the bolt that secures the HV connector cover (torque 18
Nm).
- Use a multimeter to check voltages across the HV cables and to
ground:
- B+ to ground
- B- to ground
- B+ to B-
Warning: If any voltage reading is more than 10V,
the high voltage contactors are not fully opened. Due to the
risk of electrocution, contact Service Engineering before
performing any further work.
- Disconnect the HV harness from the DCDC converter (torque 5 Nm).
- Disconnect the HV harness connectors (x3) that secure the
battery coolant, electric heater, cabin heater and compressor to the
DCDC converter.
Note: Note installed position of components before
removal.
- Disconnect the signal harness connector from the DCDC converter.
- Release the clips (x3) that secure the harness to the DCDC
converter.
- Remove the bolt and nuts (x2) that secure the DCDC converter to
the body (torque 9 Nm).
- Remove the DCDC converter from the vehicle.
Installation
Installation procedure is the reverse of removal, except for the
following:
Warning: Only use cleaning agents and solvents in a
well-ventilated area.
Note: Clean the affected areas before installation.
- Refill and bleed the cooling system (refer to procedure).
- If necessary, perform a full firmware update.
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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
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
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
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The settings associated with Adaptive Suspension
Damping provide real-time adjustments to the
suspension system to optimize both ride and handling.
Choose from:
Comfort - Provides a gentler ride for a relaxed driving
experience.
Auto - Adjusts to a wide range of roads and driving styles, pro
Warning: If the vehicle has air suspension, activate "Jack"
mode on the touchscreen before raising and supporting the vehicle.
Removal
Position the vehicle on a lift, but do not raise the vehicle at
this time.
Loosen the front LH lug nuts (torque 175 Nm).
Remove the