HEXA

HVAC 35 2 No cool air TROUBLESHOOTING HINTS : A/C compressor system malfunction - Step 2 or A/C switch system mal- function - Step 3, 4 Step Inspection Action 1 Inspect air blow out Does air blow out? Yes Go to next step. No Go to step 1 of troubleshooting indexes No. 1, 2 2 Inspect a/c compressor operation Start engine Turn both A/C switch and blower switch on. Does A/C compressor operate? Yes Go to next step. No Go to next step. 3 Inspect a/c switch indicator light Does a/c switch indicator light illuminate Yes Go to step 5. NO Go to next step. 4 Inspect a/c switch Inspect A/C switch is it okay? Yes Inspect wiring harness between climate control unit and resistor. No Replace climate control unit. 5 Inspect a/c relay (Coil-side) In- spect A/C relay. Is it okay? Yes Repair wiring harness between A/C relay and PCM (Terminal S). No Replace A/C relay. 6 Inspect a/c relay (Switch-side) Inspect A/C relay. Is it okay? Yes Install A/C relay, then go to next step. No Replace A/C relay. 7 Verify whether malfunction is in magnetic clutch and thermal pro- tector or wiring harness (Between a/c relay and magnetic clutch) Test voltage at magnetic clutch connector terminal A (A/C control signal) . Is voltage approximately 12 V? Yes Inspect magnetic clutch, If magnetic clutch is nor- mal Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs. If magnetic clutch is malfunctioning: Replace compressor, then go to next step. No Repair wiring harness between A/C relay and magnetic clutch, then go to next step. 8 Verify that malfunction symptom occurs after repair Does cool air blow out? (Is refrig- erant system performance test result correct?) Yes Troubleshooting completed. Explain repairs to customer. No Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.