Circuit Open/Short Inspection: Notes

Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION .)
Connect the SST (104 Pin Breakout Box) to the PCM disconnected.
Tighten the connector attaching bolt.
Tightening torque
1. 7.9-10.7 N.m {80-110 kgf.cm, 69.5-95.4 in.lbf}
Fig 1: Connecting 104 Pin Breakout Box
Courtesy of MAZDA MOTORS CORP.
Inspect the following wiring harness for open or short (Continuity check).

Fig 2: Identifying EGR Boost Sensor Solenoid Valve & Main Relay Harness Side Connectors
Courtesy of MAZDA MOTORS CORP.