2012 Mazda Mazdaspeed3 L4-2.3L TurboFACTORY OEM SERVICE PROCEDURE

Pinout Values and Diagnostic Parameters





PCM INSPECTION [MZR 2.3 DISI Turbo]

Without Using the M-MDS

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.

PCM terminal voltage table (Reference)

Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




*1
Without advanced keyless entry and push button start system
*2
With advanced keyless entry and push button start system

Inspection Using An Oscilloscope (Reference)

APP sensor (No.2) signal

Accelerator pedal released

Factory service manual diagram




Accelerator pedal depressed

Factory service manual diagram





PCM terminals
- 1AC (+)-body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Fan control module signal

Factory service manual diagram




PCM terminals
- 1AE (+)-body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Generator field coil control signal

Factory service manual diagram




PCM terminals
- 1AW (+)-body ground (-)

Oscilloscope setting
- 0.5 V/DIV (Y), 2 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Generator output voltage signal

Factory service manual diagram




PCM terminals
- 1AX (+)-body ground (-)

Oscilloscope setting
- 2 V/DIV (Y),1 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

A/F sensor heater control signal

Factory service manual diagram




PCM terminals
- 2C (+)-body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 200 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

CMP sensor signal

Factory service manual diagram




PCM terminals
- 2S (+)-body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 100 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

CKP sensor signal

Factory service manual diagram




PCM terminals
- 2W (+)-body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 5 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Wastegate control solenoid valve signal

Factory service manual diagram




PCM terminals
- 2AA (+)-body ground (-)

Oscilloscope setting
- 20 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition
- Switch the ignition to ON

Purge control signal

Factory service manual diagram




PCM terminals
- 2AB (+)-body ground (-)

Oscilloscope setting
- 10 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition
- Racing

OCV signal

Factory service manual diagram




PCM terminals
- 2AF (+)-body ground (-)

Oscilloscope setting
- 5 V/DIV (Y), 1 ms/DIV (X), DC range

Vehicle condition
- Racing

IGT1, IGT2, IGT3, IGT4 control signals

Factory service manual diagram




PCM terminals
- IGT1 (No.1): 2BA (+)-body ground (-)
- IGT2 (No.2): 2AW (+)-body ground (-)
- IGT3 (No.3): 2AX (+)-body ground (-)
- IGT4 (No.4): 2AT (+)-body ground (-)

Oscilloscope setting
- 2 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Fuel injection control (-)

Factory service manual diagram




PCM terminals
- Fuel injection No.1: 2BB (+)-body ground (-)
- Fuel injection No.2: 2BC (+)-body ground (-)
- Fuel injection No.3: 2BD (+)-body ground (-)
- Fuel injection No.4: 2AZ (+)-body ground (-)

Oscilloscope setting
- 10 V/DIV (Y), 20 ms/DIV (X), DC range

Vehicle condition
- Idle after warm up

Fuel injection control (+)

Factory service manual diagram




PCM terminals
- Fuel injection No.1, No.4: 2BG (+)-body ground (-)
- Fuel injection No.2, No.3: 2BH (+)-body ground (-)

Oscilloscope setting
- 20 V/DIV (Y), 400 microsecond/DIV (X), DC range

Vehicle condition
- Idle after warm up

Using the M-MDS

NOTE:
- PIDs for the following parts are not available on this model. Perform the specific inspections for the following parts:

- CMP sensor Testing and Inspection
- Main relay

1. Connect the M-MDS to the DLC-2.

Factory service manual diagram





2. Switch the ignition to ON.

3. Measure the PID value.

- If PID value is not within the specification, follow the instructions in the "Inspection item" column.

NOTE:
- The PID/DATA MONITOR function monitors the calculated value of the input/output signals in the PCM. Therefore, an output device malfunction is not directly indicated as a malfunction of the monitored value for the output device. If a monitored value of an output device is out of specification, inspect the monitored value of the input device related to the output control.
- For input/output signals except those of the monitoring items, use a voltmeter to measure the PCM terminal voltage.
- The simulation items that are used in the ENGINE CONTROL SYSTEM OPERATION INSPECTION are as follows.

- ACCS, ALTF, ARPMDES, EVAPCP, EVAPCV, FAN_DUTY, FP, IMRC, INJ_1, INJ_2, INJ_3, INJ_4, SEGRP, TEST, VT DUTY1 wt, WGC

PID/DATA monitor table (reference)

Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




Factory service manual diagram




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:

  • β€’ You smell fuel, burning insulation, or see smoke.
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  • 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.

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