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Perform the vehicle electrical
isolation procedure (refer to procedure).
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Remove the extension box from the underhood storage compartment (refer to procedure).
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Slide the harness connector off of the base of the coolant heater
assembly.
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At the base of the coolant heater bracket, disconnect the harness that leads to
the DCDC converter.
-
Release the gray harness from the forward junction box (FJB).
Caution: When looking at the FJB from the front of the vehicle, this
connector is the second from the left. Do not release the leftmost
connector.
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Release any clips that secure the coolant heater assembly to the body.
-
Release the 2 bolts that secure the coolant heater assembly to the crossmember
(torque 8 Nm).
Caution: Although the cooalnt heater assembly is now loose within the
vehicle, do not attempt to remove it at this time.
-
Clamp the input and output coolant hoses on the coolant heater:
-
Clamp the hose on the lower LH nipple as close to the coolant heater as
possible.
-
Clamp the hose on the upper nipple outboard of the battery inlet
temperature sensor.
1
|
Clamp hose to lower LH nipple |
2
|
Clamp hose to upper nipple |
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Place absorbent material beneath the coolant hoses.
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Place a container beneath the coolant heater to catch any spilled coolant.
Caution: During the next steps, do not allow coolant to spill onto the
High Voltage Battery, forward junction box, DCDC converter, coolant heater, or any
harnesses.
-
Release the coolant hose from the lower LH side of the coolant heater. Drain the
coolant from the coolant heater into the container.
-
Place a cap or plug over the lower LH side nipple on the coolant heater.
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Release the coolant hose outboard of the battery inlet temperature sensor. Drain
excess coolant into the container.
Note: Do not release the coolant hose from the top of the coolant
heater.
-
Place a cap or plug over the upper nipple on the coolant heater.
-
Remove the coolant heater from the vehicle.