Circuit Open/Short Inspection

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

Fig 1: Identifying APP And PCM Sensor 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 1AS
• 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 D and body ground
• APP sensor terminal D and power supply
• APP sensor terminal A and body ground
• APP sensor terminal A and power supply
• APP sensor terminal F and body ground
• APP sensor terminal F and power supply
• APP sensor terminal C and body ground
• APP sensor terminal C and power supply