Circuit Open/Short Inspection: Notes

Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION .)
Connect the SST (104 Pin Breakout Box) with the PCM disconnected.
Tighten the connector attaching bolt.
Tightening torque

3.0-5.4 N.m {30-56 kgf.cm, 27-48 in.lbf}

Fig 1: Connecting Special Service Tool (104 Pin Breakout Box) With PCM Disconnected
Courtesy of MAZDA MOTORS CORP.
Inspect the following wiring harness for open or short circuit (Continuity check).

Fig 2: Identifying Knock Sensor Connector Terminals (View From Terminal Side)
Courtesy of MAZDA MOTORS CORP.