Pcm Removal/Installation

Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [LF, L5] ).
Disconnect the negative battery cable.
Remove the battery and battery tray. (See BATTERY REMOVAL/INSTALLATION [LF, L5] ).
Remove the following items: (See BATTERY REMOVAL/INSTALLATION [LF, L5] ).
- Battery
- PCM cover No. 1
Disconnect the PCM connector.
Remove the battery tray and PCM component. (See BATTERY REMOVAL/INSTALLATION [LF, L5] ).
Remove in the order indicated in the table.

Fig 1: Identifying PCM Cover No. 2 And Screws
Courtesy of MAZDA MOTORS CORP.
Install in the reverse order of removal.
CAUTION:
- If the PCM connector is connected incorrectly it could be damaged. When connecting the PCM connector, connect it using the following procedure.
- If the PCM connector is inserted at an angle and the lever is moved, the connector could be damaged. Verify that the PCM connector is inserted straight.
Verify that the PCM connector lever is tilted towards the wiring harness side as shown in the figure.
Insert the PCM connector straight until it contacts the PCM and verify that the lever reverts upward naturally.

Fig 3: Identifying PCM Connector Lever And Wiring Harness Side
Courtesy of MAZDA MOTORS CORP.
Push the lever until a click is heard.
When replacing the PCM on the vehicles, perform the following:
- PCM configuration (See PCM CONFIGURATION ).
- Immobilizer system component replacement/key addition and clearing (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [KEYLESS ENTRY SYSTEM] ). (See IMMOBILIZER SYSTEM-RELATED PARTS PROGRAMMING [ADVANCED KEYLESS ENTRY AND PUSH BUTTON START SYSTEM] ).
  
  Fig 4: Pushing Lever Click Heard
  Courtesy of MAZDA MOTORS CORP.