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

Factory service manual diagram



Terminal 1A-1B:

Factory service manual diagram



Terminal 1C-1U:

Factory service manual diagram



Terminal 1V-1AI:

Factory service manual diagram



Terminal 1AJ-1AS:

Factory service manual diagram



Terminal 1AT-2D:

Factory service manual diagram



Terminal 2E-2Y:

Factory service manual diagram



Terminal 2Z-2AP:

Factory service manual diagram



Terminal 2AQ-2BH:

Factory service manual diagram





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

Factory service manual diagram



Terminal 1A-1N:

Factory service manual diagram



Terminal 1O-1AB:

Factory service manual diagram



Factory service manual diagram



Terminal 1AC-1AQ:

Factory service manual diagram



Terminal 1AR-2H:

Factory service manual diagram



Terminal 2I-2AC:

Factory service manual diagram



Terminal 2AD-2AU:

Factory service manual diagram



Terminal 2AV-2BH:

Factory service manual diagram





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

Factory service manual diagram



Terminal 1A-1B:

Factory service manual diagram



Terminal 1C-1AA:

Factory service manual diagram



Terminal 1AB-1AS:

Factory service manual diagram



Terminal 1AT-2G:

Factory service manual diagram



Terminal 2H-2AA:

Factory service manual diagram



Terminal 2AB-2AR:

Factory service manual diagram



Terminal 2AS-2BH:

Factory service manual diagram





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 Quote

No obligation. See pricing before you book.