2026-08-20

Coolant Pump - Powertrain (Remove and Replace)

Correction code 18308112 0.60 NOTE: Unless otherwise explicitly stated in the procedure, the correction code and its associated FRT reflect all of the work required to perform this procedure, including the linked procedures. Do not stack correction codes unless explicitly told to do so. NOTE: See Flat Rate Times to learn more about FRTs and how they are created. NOTE: See Personal Protection to make sure wearing proper PPE when performing the below procedure. NOTE: See Ergonomic Precautions for safe and healthy working practices.

  • 2026-08-20: Added the step to run the heat pump commissioning routine.
  • 2025-12-01: Fixed minor errors.
  • 2025-07-28: Added coolantPumpType configuration step.
  • 2024-08-07: Changed instruction for lubrication of O-rings to use Silicone lubricant instead of using silaramic grease.
  • 2024-02-29: Updated the routines.
  • 2023-07-06: Added steps for config changes and pump identification.

Torque Specifications

Table 1. Torque Specifications: Coolant Pump - Powertrain (Remove and Replace)
Description Torque Value Recommended Tools Reuse/Replace Notes
Bolts (x4) that attach the powertrain coolant pump to the supermanifold
1.8 Nm (1.3 lbs-ft)
  • T20 socket
Reuse

Remove

  1. Open the LH front door and lower the LH front window.
  2. Remove the HEPA filter assembly. See Assembly - Filter - HEPA (Remove and Replace).
  3. Place the vehicle in Service Mode. See Service Mode.
  4. Unlock the vehicle gateway. See Gateway (Unlock).
  5. On the touchscreen, touch Service Mode > Thermal > Coolant System > Coolant Fill Drain and select Run, and allow the routine to complete.
  6. Disconnect 12V power. See 12V/LV Power (Disconnect and Connect).
  7. Remove the fresh intake duct. See Duct - Fresh Intake (Remove and Replace).
  8. Place an absorbent material underneath the coolant pump.
    Note
    Make sure the material covers the front drive unit 12V connector, steering rack, and is positioned to catch fluid from the heat exchanger coolant outlet.
  9. Disconnect the electrical harness from the powertrain coolant pump connector.
    Note
    Pull the red tab to release the connector lock, and then pull the connector to disconnect the connector.
    Tip
    If multiple pumps are being disconnected, apply masking tape to each electrical connector and label the tape with the pump locations.
  10. Remove the bolts (x4) that attach the powertrain coolant pump to the supermanifold, and then remove the pump from the supermanifold.
    CAUTION
    Make sure the inner and outer O-rings are removed with the coolant pump.
    Tip
    Use of the following tool(s) is recommended:
    • T20 socket

Install

  1. Remove and discard any o-rings or debris in the supermanifold where the coolant pump will install.
  2. Make sure that new o-rings are installed onto the new coolant pump.
  3. Lubricate the o-rings with Silicone lubricant.
  4. Position the outlet of the coolant pump in the up position, and then insert the coolant pump into the supermanifold.
    CAUTION
    Make sure that the coolant pump is fully seated in the supermanifold.
  5. Hand-tighten the bolts (x4) that attach the coolant pump to the supermanifold.
  6. Tighten the coolant pump bolts (x4) in a cross-pattern.
    1.8 Nm (1.3 lbs-ft)
    Tip
    Use of the following tool(s) is recommended:
    • T20 socket
  7. Connect the electrical harness to the coolant pump connector, and then engage the locking tab.
    CAUTION
    If multiple pumps were disconnected, make sure to reconnect the correct electrical connector for this pump location.
  8. Remove the coolant drain material from under the vehicle.
  9. Perform a cooling system vacuum refill. See Cooling System (Vacuum Refill).
  10. Connect 12V power. See 12V/LV Power (Disconnect and Connect).
  11. Unlock the vehicle gateway. See Gateway (Unlock).
  12. Perform the routine using Service Mode or Toolbox: PROC_VCFRONT_X_STOP-THERMAL-FILL-DRAINvia Service Mode:
    • Thermal ➜ Actions ➜ Stop Thermal Fill/Drain
    • Thermal ➜ Coolant System ➜ Stop Coolant Fill/Drain
    • Thermal ➜ Refrigerant System ➜ Stop Refrigerant Fill/Drain
    via Service Mode Plus:
    • Drive Inverter ➜ Front Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
    • Drive Inverter ➜ Rear Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
    • Drive Inverter ➜ Rear Left Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
    • Drive Inverter ➜ Rear Right Drive Inverter Replacement ➜ Stop Fluid Fill/Drain
    • Drive Unit ➜ Front Drive Unit Replacement ➜ Stop Coolant Fill/Drain
    • Drive Unit ➜ Rear Drive Unit Replacement ➜ Stop Coolant Fill/Drain
    via Toolbox:(link)
  13. Enable Service Mode Plus. See Service Mode Plus.
  14. Perform the routine using Service Mode or Toolbox: TEST-SELF_VCFRONT_X_HEAT-PUMP-COMMISSIONINGvia Service Mode:Thermal ➜ Refrigerant System ➜ Commission Heat Pumpvia Service Mode Plus:Drive Inverter ➜ Front Drive Inverter Replacement ➜ Heatpump commissioningvia Toolbox:(link)
  15. Tap Thermal > Actions > Thermal Configurations > coolantPumpType to inspect the current coolant pump configuration. If the configuration is not DUAL_MIX, change it to DUAL_MIX.
  16. Tap Coolant System > Run Coolant Pumps Identification > Run, and close once the routine is passed.
  17. Tap Coolant System > Coolant Purge > Run, and close once the routine is passed.
  18. Inspect the coolant level and make sure the fluid level is at the Max line.
  19. Install the fresh intake duct. See Duct - Fresh Intake (Remove and Replace).
  20. Install the HEPA filter assembly. See Assembly - Filter - HEPA (Remove and Replace).
  21. Exit Service Mode. See Service Mode.
  22. Raise the LH front window and close the LH front door.