SAFARI

41 AIRCONDITIONING C. TROUBLESHOOTINGON COOLER ELECTRICAL CIRCUIT 1. Troubleshooting Flow Chart After making sure that the blower circuit operation is good, troubleshoot the cooler circuit in the following procedures. STEP 1 CHECK A/C SWITCH FUNCTION STEP 2 CHECK MAGNETIC CLUTCH STEP 3 CHECK POWER SOURCE TO CLUTCH STEP 4 CHECK MAGNETIC CLUTCH RELAY STEP 5 CHECK OUTPUT FROM AMPLIFIER STEP 6 CHECK INPUT TO AMPLIFIER With blower operated, push on A/C switch, and check whether A/C switch lamp is lit. No With A/C switch and blower switches On, check whether magnetic clutch is On. Yes Check voltage of 1-pole connec- tor for the magnetic clutch. Check voltages to clutch relay Connector No Battery Voltage or No Grounding Check output voltage from amplifier. Terminal 1A – OK No Good Inspect A/C fuse OK Blown or Bad Contact Check wiring between A/C fuse and the blower circuit. Check magnetic clutch coil. Step 4-1 Check relay and its wiring Check continuity of wiring between amplifier and mag- netic clutch relay. Check input voltage to A/C fuse 12V Replace it Check A/C switch Check condenser Fan relay circuit 12V OK OK OK Check each input voltage and sig- nal from sensor such as Ther- mistor, Dual Pressure S/W Engine RPM signal from eng. ECU. Also check the earth circuit for amplifier. OK Replace amplifier Check sensor and its wiring, which don't input correct sig- nal. Important Also A/C idle up check should be done Visu- allsy regardless of above troubleshooting result, No No Good OK