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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.
  1. Disconnect the negative battery cable. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION .)
  2. 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)
    1. Remove the bolt shown in the figure.
      Fig 1: Resonance Duct Bolt With Torque Specification
      G11274216Courtesy of MAZDA MOTORS CORP.
    2. Disconnect the air intake hose No. 1 from the joint pipe.
      G11274217Courtesy of MAZDA MOTORS CORP.
    3. 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.
      G11274218Courtesy of MAZDA MOTORS CORP.
  3. Disconnect the PCM connector. (See PCM CONNECTOR CONNECTION NOTE .)
    G11274219Courtesy of MAZDA MOTORS CORP.
  4. Detach the clips and remove the emission wiring harness protector.
    G11274220Courtesy of MAZDA MOTORS CORP.
  5. Remove the nuts and bolt.
    Fig 2: PCM Assembly, Nuts And Bolt With Torque Specification
    G11274221Courtesy of MAZDA MOTORS CORP.
  6. Remove the PCM assembly.
  7. Remove the nuts.
    Fig 3: PCM, PCM Bracket And Nuts With Torque Specification
    G11274222Courtesy of MAZDA MOTORS CORP.
  8. Remove the PCM from the PCM bracket.
  9. Install in the reverse order of removal.
  10. When replacing the PCM on the vehicles, perform the following:
    NOTE:
    • If configuration cannot be performed by reading/writing of the vehicle specification information, perform the configuration using As-Built information after replacing the PCM. (See PCM CONFIGURATION (USING AS-BUILT DATA) .)
    1. Perform the PCM configuration. (See PCM CONFIGURATION (USING READ/WRITE FUNCTION) .)
    2. Perform the immobilizer system-related part programming. (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING .)
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