Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION ).
2. Disconnect the APP sensor connector.
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
   Fig 1: Identifying APP Sensor Wiring Harness Side Connector Terminals

   Courtesy of MAZDA MOTORS CORP.
   Fig 2: Identifying PCM Wiring Harness-Side 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.
  • APP sensor terminal A and PCM terminal 1AJ
  • APP sensor terminal B and PCM terminal 1AV
  • APP sensor terminal C and PCM terminal 1AP
  • APP sensor terminal D and PCM terminal 1AL
  • APP sensor terminal E and PCM terminal 1 AS
  • APP sensor terminal F and PCM terminal 1AO

Short circuit 

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