626 1999-2001

Powertrain Control Module

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Location



Specific to:

Mazda 626 1998-2002

The Powertrain Control Module (PCM) is located below the center of the instrument panel, and is accessed by removing the center console.

Operation



Specific to:

Mazda 626 1999-2002

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



Specific to:

Mazda 626 1999-2002

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the rear console.
  4.  
  5. Unplug the wiring harness connector from the control module.
  6.  
  7. Loosen 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.  

Testing



Specific to:

Mazda 626 1998-2002


NOTE
Manufacturer does not provide a specific testing procedure for this component. See -DIAGNOSTICS- section for individual testing of PCM-related issues.

 
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