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HOMESERVICE MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 600 (SYMPTOM TROUBLESHOOTING [ENGINE CONTROL SYSTEM L3 WITH TC))ENGINE CONTROL SYSTEM OPERATION INSPECTIONVARIABLE VALVE TIMING CONTROL SYSTEM OPERATION INSPECTIONEVAP SYSTEM TEST DESCRIPTION
2008 Mazda 6 s Sport, 4D Hatchback, Standard

EVAP system test description

2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION EVAP system test description
WARNING: This page is about a different car, the 2007 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
  • The EVAP system test finds gas leaks in the system using the PCM to monitor changes in the air pump load current of the EVAP system leak detection pump. This test starts after sending an on-demand test signal from the M-MDS to the PCM. The PCM controls the air pump and change-over-valve operation and also stores the load current of the air pump as follows:
    1. The PCM turns the air pump on and retrieves the air pump load current value (LDP_MON PID) as a reference current (LDP_REF PID).
    2. After retrieving the reference current value, the PCM commands the change-over-valve to open, then captures the air pump load current value (LDP_MON PID) as the idle current (LDP_IDL PID). The EVAP system will be pressurized from this phase.
    3. The PCM continues to monitor the air pump load current value (LDP_MON PID) until the end of the test.
  • You can confirm whether any EVAP gas leak has occurred or not by reading the test results.
    Fig 1: Testing Evaporative Gas
    G04324270Courtesy of MAZDA MOTORS CORP.
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