Where are the sensors of Power Mac G5(MLB Max6690 AMB and MLB Inlet AMB)

Because I replacing the MLB. So, I Used the Initiate Calibration in the ASD(693-5964). It reported me an error.
-ERROR　CPU0
Check or replace temperature inlet sensor on housing

So, I Used the diagnostic. It reported me two errors.

-TEST LOG-
Testing Temperature Sensor MLB Max6690 AMB...
-Thermometer reads within operating range
Check to ensure that Thermometer reads within operating range
Error 1
- TEST FAILED -

Testing Temperature Sensor MLB Inlet AMB...
-Thermometer reads within operating range
Check to ensure that Thermometer reads within operating range
Error 1
- TEST FAILED -

I have no another same type machine to replacing sensors.
Have another users or technical can tell me where are two sensors in the machine?
Thank you very much!