Using SST (104 Pin Breakout Box)

Disconnect the negative battery cable.
Disconnect the PCM connector.
Connect the SST (104 Pin Breakout Box) to the PCM as shown.

Fig 1: Connecting SST To PCM
Courtesy of MAZDA MOTORS CORP.
Tighten the connector bolt.
Tightening torque

7.9-10.7 N.m { 80-110 kgf.m, 69.5-95.4 in.lbf }
Connect the negative battery cable.
Measure the voltage at each terminal.
If any incorrect voltage is detected, check related systems, wiring harnesses and connectors referring to the possible malfunction in the terminal voltage list.