Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2013 Mazda MX-5 Miata Grand Touring, Automatic TransFACTORY OEM SERVICE PROCEDURE

Circuit Open/Short Inspection

Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION ).
Inspect the following wiring harness for open or short circuit (continuity Inspection).

Fig 1: Identifying CPP Switch 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.
- CPP switch terminal B and PCM terminal 1D
- CPP switch terminal D and body ground

Short circuit

If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- CPP switch terminal B and body ground

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.

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