Test B: Checking Charge Using Sight Glass
NOTE:
The following procedure can be used for quickly checking whether the A/C system has a proper charge of refrigerant or not.
- Run engine at fast idle.
- Operate A/C at its maximum cooling capacity (for single A/C model) or at the following conditions (for dual A/C model) for a few minutes:
- Main (front) A/C switch in ON position.
- Rear A/C main switch in ON position (if equipped).
- Front blower motor switch in MAX position.
- Rear blower motor switch in MAX position (if equipped.)
- Air outlet control button in FACE position.
- Temperature control lever in MAX cool position.
- Vehicle doors all open.
- Air inlet door in RECIRCULATION position.
- Look at the sight glass and compare what is observed with the symptoms listed in the table. See Fig 1.