Circuit Open/Short Inspection

Fig 1: Identifying MAP Sensor Wiring Harness-Side Connector

Courtesy of MAZDA MOTORS CORP.

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

   Courtesy of MAZDA MOTORS CORP.

Open circuit 

• If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
  • MAP/boost air temperature sensor terminal A and PCM terminal 2AV
  • MAP/boost air temperature sensor terminal C and PCM terminal 2AU
  • MAP/boost air temperature sensor terminal D and PCM terminal 2AG

Short circuit 

• If there is continuity, there is a short circuit. Repair or replace the wiring harness.
  • MAP/boost air temperature sensor terminal A and power supply.
  • MAP/boost air temperature sensor terminal C and body ground.
  • MAP/boost air temperature sensor terminal D and power supply.
  • MAP/boost air temperature sensor terminal D and body ground.