ON-VEHICLE INSPECTION 1. CHECK CONDENSER FINS FOR BLOCKAGE OR DAMAGE If the fins are clogged, clean them with pressurized water. CAUTION: Be careful not to damage the fins. 2. MAKE SURE THAT DRIVE BELT IS INSTALLED CORRECTLY After installing the drive belt, check that it fits properly in the ribbed grooves. 3. CHECK DRIVE BELT TENSION Using a belt tension gauge, check the drive belt tension. Belt tension gauge: Nippondenso BTG-20(95506-00020) or Borroughs No.BT-33-73F Drive belt tension: New belt 160 ± 20 lb Used belt 105 ± 10 lb HINT: • "New belt" refers to a belt which has been used less than 5 minutes on a running engine. • "Used belt" refers to a belt which has been used on a running engine for 5 minutes or more. 4. START ENGINE 5. TURN ON A/C SWITCH Check that the A/C operates at each position of the blower switch. 6. CHECK MAGNETIC CLUTCH OPERATION If magnetic clutch does not engage, check the A/C fuse. 7. CHECK THAT IDLE INCREASES When the magnetic clutch engages, engine revolution should increase. Standard idle-up rpm: 7M-GTE E/G 900 rpm 700 rpm M/T (N range) A/T (D range) 7M-GE E/G 900 rpm 650 rpm 8. CHECK CONDENSER FAN MOTOR ROTATES 9. CHECK AMOUNT OF REFRIGERANT If you can see bubbles in the sight glass, additional refrigerant is needed. (See page AC-21) 10. IF NO COOLING OR IT IS INSUFFICIENT, INSPECT FOR LEAKAGE Using a gas leak detector, inspect each component of the refrigeration system. [DIAGRAMS SHOWING: Three waveform patterns labeled "CORRECT", "WRONG", "WRONG" with CHO086 reference number, and belt tension gauge diagrams showing Nippondenso and Borroughs configurations with reference number EC0063,EC0634,D0061]