Circuit Open/Short Inspection

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

Fig 1: Identifying APP And PCM Sensor Connector Terminals

G05981141

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