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Mazda Performance Reprogram

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Mazda Performance Reprogram

Some owners of 2016-2018 Mazda CX-9 vehicles may experience a lack of power with no warning lights and no related DTCs stored. This concern most likely occurs when the fuel temperature is high and during situations where high power is required.

The concern may be caused when the learning value for the low pressure fuel pump exceeds a certain level and the PCM limits engine power to avoid a lack of fuel injection. Even if the low pressure fuel pump has a problem, no DTCs are stored.

To eliminate the concern, the PCM control logic has been modified not to limit engine power. After the modification, DTCs P0192:00 or P0087:00 are stored when the fuel injection amount if insufficient.

Inspect the low pressure fuel pump using the Mazda Modular Diagnostic system (M-MDS). If the low pressure fuel pump exhibits normal performance, reprogram the PCM without replacing the fuel pump. If the low pressure fuel pump exhibits poor performance, replace the pump and reprogram the PCM.

1. Connect the M-MDS to the DLC-2.

2. Warm the engine and leave it at idle with the least amount of electrical loads.

3. After the tool has identified the vehicle, select the following items from the initialization screen of the M-MDS:

  • Select Datalogger
  • Select Modules
  • Select PCM

4. Select the following PID from the PID table:

  • FP_DUTY: Fuel pump control module control duty value
  • FUEL_LO_T: Fuel temperature inside the fuel supply line

5. Mark a point on the graph for the PID data and verify if the point is located above the line (in the poor performance area) or below the line (in the normal performance area).

Reboot the IDS to clear memory before reprogramming. Using IDS108.03 or higher, reprogram the PCM to the latest calibration by following the Module Reprogramming procedure. After reprogramming, clear all DTCs. Start the engine and confirm that no warning lights stay on. If the PID data is in the poor performance area, replace the low pressure fuel pump.

CALIBRATION INFORMATION

MODEL YEAR ............. DRIVE ........... FILE NAME

2016-2017......................2WD................PYFL-188K2-M

2016-2017......................AWD................PYFM-188K2-M

2018...............................2WD.................PYD7-188K2-C

2018...............................AWD.................PYD8-188K2-C

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