Mazda Car 2005-06

Powertrain Control Module (PCM)

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Operation



The PCM/ECM performs many functions on your car. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range.

Based on the information that is received and programmed into the PCM's memory, the PCM generates output signals to control relays, actuators and solenoids. The PCM also sends out a command to the fuel injectors that meters the appropriate quantity of fuel. The module automatically senses and compensates for any changes in altitude when driving your vehicle.

The PCM/ECM performs many functions on your car. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range.

Based on the information that is received and programmed into the PCM's memory, the PCM generates output signals to control relays, actuators and solenoids. The PCM also sends out a command to the fuel injectors that meters the appropriate quantity of fuel. The module automatically senses and compensates for any changes in altitude when driving your vehicle.

Removal & Installation



  1. Disconnect the negative battery cable.
  2.  
  3. Remove the battery cover.
  4.  
  5. Remove the battery duct.
  6.  
  7. Remove the battery and battery tray with the PCM.
  8.  
  9. Remove the PCM harness connectors.
  10.  
  11. Remove the PCM from the battery tray.
  12.  
  13. Installation is the reverse of the removal procedure.
  14.  

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the PCM cover.
  4.  
  5. Remove the PCM harness connectors.
  6.  
  7. Remove the mounting fasteners and remove the PCM from the vehicle.
  8.  
  9. Installation is the reverse of the removal procedure. Tighten mounting fasteners to 70-95 in lbs.
  10.  

 
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