Performance Testing The A/C System - Lexus 1993 ES300 General Procedures

Performance Testing the A/C System

Proceed with Performance Testing the A/C System after
completing the Special Oil Injection Service.
1. Start the engine and maintain 1,500 RPM.
2. Set the A/C to AUTO –– MAX COOL.
3. Fully open all doors.
4. At the Under Hood Diagnostic Connector jump
OP1 to E1 to maintain a stable fan speed.
5. Position one thermometer in the center duct and
one thermometer near the A/C inlet. (NOT laying
on the carpet.)
6. After 5 minutes of operation compare the
difference between the inlet temperature and the
center duct temperature to the Performance
Test Chart. System performance is acceptable if
temperature difference is greater than the
specified minimum (as shown).
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