Electric Vehicle Forums - How-To: Replace the Battery Cooling Blower on a GS450H

Hey guys,

I had the pleasure of working on a GS450H for the first time ever this past weekend! The customer wanted to replace the battery blower on his gorgeous white pearl GS hybrid so I gladly went about the job :shade: All in all it took about 2.5 hours to accomplish the replacement job but your time may vary depending on the level of your mechanical proficiency. For thos DIY'ers in tonight's studio audience, here is a handy dandy guide for replacing the battery cooling blower on a GS450H:

**Reference Material**
GS450H Battery Cooling Blower diagram

--CAUTION--
Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions, such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.

After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.

1) Disconnect the negative battery cable.

2) Remove the luggage compartment floor mat.

3) Remove the battery service hole cover LH.

4) Remove the hybrid service plug grip.

5) Remove the tool box.

6) Remove the rope hook assembly.

7) Remove the luggage compartment front trim cover.

8) Remove the No. 2 HV battery intake duct. Wear insulated gloves.

9) Remove the 2 nuts and battery cooling blower connector.

10) Separate the No. 3 HV battery intake duct and No. 4 HV battery intake duct.

11) Remove the battery cooling blower assembly together with the No. 3 HV battery intake duct from the HV battery.

12) Remove the No. 3 HV battery intake duct from the battery cooling blower assembly.

--To install--

1) Install the No. 3 HV battery intake duct to the battery cooling blower assembly.

2) Install the battery cooling blower assembly together with the No. 3 HV battery intake duct to the HV battery. Wear insulated gloves.

3) Connect the No. 3 HV battery intake duct to the No. 4 HV battery intake duct.

4) Install the 2 nuts and connector. Tighten the HV blower mounting bolts to 71 inch. lbs. (8 Nm).

5) Install the No. 2 HV battery intake duct with the 2 clips.

6) Install the luggage compartment front trim cover.

7) Install the rope trim assembly.

8) Install the tool box.

9) Install luggage compartment inner trim cover RH.

10) Install the service plug grip.

11) Install the battery service hole cover.

12) Install the luggage compartment floor mat.

13) Connect the negative battery cable.