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Evaporative system test description
- The evaporative system test finds gas leaks in the system using the PCM to monitor changes in the EVAP system leak detection pump air pump load current. This test starts after sending an on-demand test signal from the WDS to the PCM. The PCM controls the Air pump and Change over valve (COV) operation and also stores the load current of the air pump as follows.
- The PCM commands turn the air pump up and retrieve the air pump load current value (LDP_MON PID) as a reference current (LDP_REF PID).
- After retrieving a reference current value, the PCM commands the Change over valve (COV) to open, then captures the air pump load current value (LDP_MON PID) as idle current (LDP_IDL PID). The evaporative system will be pressurized from the phase.
- The PCM continues to monitor the air pump load current value (LDP_MON PID) until the end of the test.
Courtesy of MAZDA MOTORS CORP.
- You can confirm whether any evaporative gas leak occurred or not by reading the test results.
Courtesy of MAZDA MOTORS CORP.