Circuit Open/Short Inspection

Disconnect the PCM connector.
Disconnect the throttle body connector.
Inspect the following wiring harnesses for open or short circuit. (Continuity inspection)

Fig 1: Identifying Throttle Body And PCM Connector Terminals

G05981140

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.

Throttle body terminal C and PCM terminal 2P
Throttle body terminal D and PCM terminal 2AL
Throttle body terminal E and PCM terminal 2AO
Throttle body terminal F and PCM terminal 2AK

Short circuit

If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.

Throttle body terminal E and body ground
Throttle body terminal E and power supply
Throttle body terminal F and body ground
Throttle body terminal F and power supply
Throttle body terminal D and body ground
Throttle body terminal D and power supply