Pcm Removal/Installation: Notes

CAUTION:

If configuration and reprogramming is not performed when the PCM is replaced with a new one, the vehicle specification information and PCM software is not stored in the PCM and the system will not operate normally.
When performing configuration and reprogramming, it is necessary to read the vehicle specification information from the PCM before replacing it. Connect the M-MDS to the vehicle and perform vehicle identification before removing the PCM. The vehicle specification information is temporarily stored in the M-MDS.

NOTE:

The PCM prior to replacement stores the vehicle specification information.
A new PCM does not store any vehicle specification information.
If the vehicle specification information PCM prior to replacement cannot be read, perform the configuration using As-Built data.

When replacing the PCM, perform the PCM configuration using the M-MDS.
1. Connect the M-MDS to the DLC-2.
2. Switch the ignition ON (engine off or on).
3. Perform the following procedure using the M-MDS.
  1. Press [Start] for the vehicle identification.
  2. Press the [Toolbox] tab.
  3. Press the [Work Support] icon.
  4. Press [Configuration].
  5. Press [Run] for [Configuration].
  6. Press [PCM].
4. Perform the configuration following the instructions on the screen.
Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)

Set the resonance duct and air intake hoses No. 1 and 2 aside as a single unit using the following procedure. (With resonance chamber No. 2)

Remove the bolt shown in the figure below.

Fig 1: Resonance Duct And Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.

Disconnect the air intake hose No. 1 from the joint pipe.

Courtesy of MAZDA MOTORS CORP.

Set the resonance duct and air intake hoses No. 1 and 2 aside as a single unit in the direction of the arrow shown in the figure below.

Courtesy of MAZDA MOTORS CORP.

Disconnect the PCM connector. (See PCM Connector Connection Note .)

Courtesy of MAZDA MOTORS CORP.
Detach the clips and remove the emission wiring harness protector.

Courtesy of MAZDA MOTORS CORP.
Remove the nuts and bolt.

Fig 2: PCM Assembly, Nuts And Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the PCM assembly.
Remove the nuts.

Fig 3: PCM, PCM Bracket And Nuts With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the PCM from the PCM bracket.
Install in the reverse order of removal.
If the PCM is replaced, perform the following procedure.
1. Perform the PCM configuration using the M-MDS.
  1. Connect the M-MDS to the DLC-2.
  2. Switch the ignition ON (engine off or on).
  3. Perform the following procedure using the M-MDS.
    CAUTION:
    If the configuration fails, perform the configuration again.
    1. Press [Start] for the vehicle identification.
    2. Press the [Toolbox] tab.
    3. Press the [Work Support] icon.
    4. Press [Configuration].
    5. Press [Run] for [Configuration].
    6. Press [PCM].
  4. Perform the servicing following the instructions on the screen.
    CAUTION:
    When performing the configuration, CAN communication is cut temporarily and communication error DTCs may be detected. After performing the configuration, perform the DTC inspection and clear DTCs if any are displayed.
  5. Perform the DTC inspection. (Refer to [DTC INSPECTION ] in the troubleshooting information)
    - If a DTC is displayed, clear it. (Refer to [CLEARING DTC ] in the troubleshooting information)
      - If the DTC is displayed again, repair or replace the malfunctioning location according to the applicable DTC troubleshooting.
  6. If the configuration fails, perform the configuration procedure again.
2. Perform the immobilizer system-related part programming. (Refer to IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [SECURITY AND LOCKS] in the troubleshooting information.)