2026-08-24

Battery Coolant Pump 2 (Remove and Replace)

Correction Code 18308602 Correction Code 18308802

Coolant pump locations:

RWD vehicles built through April 10, 2016 (1st Generation) Dual Motor vehicles built through April 10, 2016 (1st Generation)
RWD vehicles built after April 10, 2016 (2nd Generation) Dual Motor vehicles built after April 10, 2016 (2nd Generation)
1 Battery Coolant Pump 1
2 Battery Coolant Pump 2
3 Powertrain Coolant Pump 1
4 Powertrain Coolant Pump 2

Removal

Warning
If the 12V power supply is disconnected, do not attempt to open any doors with door glass in closed position. Failure to follow this instruction could result in door glass shatter.
Note
Before disconnecting the 12V power supply, ensure that the driver’s door window is fully open. Failure to follow this instruction could result in vehicle lockout.
  1. Disconnect 12V power. See Disconnect 12V Power.
  2. Remove the underhood storage unit for access. See Underhood Storage Unit (Remove and Install).
  3. Disconnect the harness from the coolant pump.
  4. Position a container beneath the pump in order to catch any coolant that is spilled in a later step.
  5. Clamp the inlet and outlet hoses.
  6. Release the spring clamps from the inlet and outlet hoses.
    CAUTION
    Do not remove the clamps that were placed on the inlet and outlet hoses in step 5.
  7. Remove the inlet and outlet hoses from the coolant pump assembly.
  8. Slide the coolant pump assembly off of the bracket. Remove the pump assembly from the vehicle.
    Note
    The coolant pump assembly includes both the coolant pump and the rubber isolator.
  9. Use a marker to draw a line on the top of the rubber isolator and pump.
    Note
    This line helps to align the isolator when installing it on the new coolant pump.
  10. Carefully remove the rubber isolator from the coolant pump.
    CAUTION
    Do not damage or remove the vent.
  11. Clean any spilled coolant.

Installation

Installation procedure is the reverse of removal, except for the following:
  • Clean any spilled coolant.
  • When placing the rubber isolator over the coolant pump, ensure that the lines on the pump and the isolator are aligned.
  • When all components have been reinstalled, refill and bleed the cooling system. See Cooling System - Partial Refill and Bleed.