Circuit Open/Short Inspection

1. Disconnect the PCM connector.
2. Disconnect the KS connector.
3. Inspect the following wiring harnesses for open or short. (Continuity inspection)

Fig 1: Identifying KS And PCM Connector Terminals

Courtesy of MAZDA MOTORS CORP.

Open circuit 

• If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.

• KS No. 1 terminal A and PCM terminal 2U
• KS No. 1 terminal B and PCM terminal 2V
• KS No. 2 terminal A and PCM terminal 2AC
• KS No. 2 terminal B and PCM terminal 2Y

Short circuit 

• If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

• KS No. 1 terminal A and body ground
• KS No. 1 terminal A and power supply
• KS No. 1 terminal B and body ground
• KS No. 1 terminal B and power supply
• KS No. 2 terminal A and body ground
• KS No. 2 terminal A and power supply
• KS No. 2 terminal B and body ground
• KS No. 2 terminal B and power supply