Short circuit

• If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.
  • Front HO2S terminal A and body ground
  • Front HO2S terminal B and body ground
  • Front HO2S terminal B and power supply
  • Front HO2S terminal D and body ground
  • Front HO2S terminal D and power supply
  • Front HO2S terminal E and body ground
  • Front HO2S terminal E and body ground

^*1 : LF MTX, L3

^*2 : LF ATX

• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
  • HO2S terminal A and body ground
  • HO2S terminal A and power supply
  • HO2S terminal B and power supply

^*1 : LF MTX, L3

^*2 : LF

Fig 1: PCM Connector Terminal Identification

Courtesy of MAZDA MOTORS CORP.

• If there is no continuity, there is a short circuit. Repair or replace the wiring harness.

  Front and rear 

  • HO2S terminal C and body ground
  • HO2S terminal D and power supply
  • HO2S terminal D and body ground

^*1 :LF MTX, L3

^*2 :LFA

Fig 1: PCM Connector Terminal Identification

Courtesy of MAZDA MOTORS CORP.