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.

Disconnect the negative battery cable. (See NEGATIVE BATTERY CABLE 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)
1. Remove the bolt shown in the figure.
  
  Fig 1: Identifying Resonance Duct Bolt With Torque Specifications
  Courtesy of MAZDA MOTORS CORP.
2. Disconnect the air intake hose No. 1 from the joint pipe.
  
  Fig 2: Identifying Joint Pipe And Air Intake Hose No. 1
  Courtesy 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.
Fig 3: Setting Resonance Duct And Air Intake Hoses No. 1 And 2 Aside
Courtesy of MAZDA MOTORS CORP.
Disconnect the PCM connector. (See Connector Connection-PCM .)

Fig 4: Disconnecting PCM Connector
Courtesy of MAZDA MOTORS CORP.
Detach the clips and remove the emission wiring harness protector.

Fig 5: Removing Emission Wiring Harness Protector
Courtesy of MAZDA MOTORS CORP.
Remove the nuts and bolt.

Fig 6: Identifying PCM Assembly Nut And Bolt With Torque Specifications
Courtesy of MAZDA MOTORS CORP.
Remove the PCM assembly.
Remove the nuts.

Fig 7: Identifying PCM Assembly, Bracket And Nuts
Courtesy of MAZDA MOTORS CORP.
Remove the PCM from the PCM bracket.
Install in the reverse order of removal.
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 .)