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EVAP Leak Detecting Pump Check

Check EVAP leak detecting pump in EVAP leak check module as follows.
1. Connect spherical pneumatic plastic bag (1) with approximately 12.5 cm (4.92 in) diameter (volume of a sphere: 1 L) to EVAP leak check module using a rubber band (2) as shown in figure.
2. Operate EVAP canister vent valve and EVAP leak detecting pump by connecting 12 V-battery to EVAP leak check module terminals as shown in figure.
3. Check that air in the pneumatic plastic bag is fully evacuated by EVAP leak detecting pump within approximately 2 minutes.
  If check result is not as described above, replace EVAP leak check module.
  
  CAUTION: Check to make sure that connection is made between correct terminals. Wrong connection can cause damage to EVAP canister vent valve and EVAP leak detecting pump in EVAP leak check module.

Fig 1: Checking EVAP Leak Detecting Pump In EVAP Leak Check Module

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