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.
2007 Mazda 3 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Component Tests and General Diagnostics
PCM INSPECTION[LF, L3]
Without Using the SST
California emission regulation applicable model









NOTE: The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.
Except for California emission regulation applicable model with LF ATX









NOTE: The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.
Except for California emission regulation applicable model with LF MTX and L3








NOTE: The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.
Without Using the SST
California emission regulation applicable model
Terminal 1A-1B:
Terminal 1C-1U:
Terminal 1V-1AI:
Terminal 1AJ-1AS:
Terminal 1AT-2D:
Terminal 2E-2Y:
Terminal 2Z-2AP:
Terminal 2AQ-2BH:
NOTE: The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.
Except for California emission regulation applicable model with LF ATX
Terminal 1A-1N:
Terminal 1O-1AB:
Terminal 1AC-1AQ:
Terminal 1AR-2H:
Terminal 2I-2AC:
Terminal 2AD-2AU:
Terminal 2AV-2BH:
NOTE: The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.
Except for California emission regulation applicable model with LF MTX and L3
Terminal 1A-1B:
Terminal 1C-1AA:
Terminal 1AB-1AS:
Terminal 1AT-2G:
Terminal 2H-2AA:
Terminal 2AB-2AR:
Terminal 2AS-2BH:
NOTE: The PCM terminal voltage can vary with the conditions when measuring and changes due to aged deterioration on the vehicle, causing false diagnosis. Therefore determine comprehensively where the malfunction occurs among the input systems, output systems, and the PCM.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.
