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Are you an aftermarket repair shop? Was the inverter new from Toyota? Was the water pump new from Toyota? Do you have the ability to clear hybrid codes from the hybrid control unit computer? If you clear these codes and hybrid codes do they come right back every time?
Yes we are. No, it was a known good one from a junkyard. Yes we have a snap-on modis scanner. Yes it was an updated auxillary pump from Toyota. Sometimes it will not let us clear the codes and sometimes we can start it up with no codes and no master warning light. Our scanner shows -50 inverter temp, but master warning light comes on with an over heating light.