I have test for Mass airflow sensor but it makes no sense.
Notice that on svx it does not tell where to test to or from. This is from service manual. Thanks

Legacy
Key On ................ Red & Black/Red ............ 10-13 Volts
Engine On ............. Red & Black/Red ............ 13-14 Volts
Key On ............... Black & Black/Red ............ 0-0.3 Volt
Engine On ............ Black & Black/Red ......... 0.8-1.2 Volts
Key On .............. White & Black/Red ............. Zero Volts
Engine On ........... White & Black/Red ............. Zero Volts
Loyale
Key Off ............... Black & Ground ............... 0-10 Ohms
Key On ................. Red & Ground ............ 10 Volts Min.
Key On ................. White & Black .......... (1) .1-.5 Volt
SVX
Key On ................... Black/Red ............... 10-13 Volts
Key On ..................... White ................. 0-0.3 Volts
Key On ..................... Black .................. Zero Volts
Engine On ................ Black/Red ............... 13-14 Volts
Engine On .................. White ............... 0.8-1.2 Volts
Engine On .................. Black .................. Zero Volts