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MANUAL A/C DIAGNOSIS TSB Revision HEATER, AIR CONDITIONING AND VENTILATION 55-19 STEP 3. Check the rear heater switch continuity. Remove the rear heater switch and check continuity. Q: Is the rear heater switch normal? YES : Go to Step 4. STEP 4. Check the resister resistance value. Use an ohmmeter to check the resistance between terminals Standard value: 3.9 Ω Q: Is the resistance value correct? YES : The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is − How to Cope with Intermittent Malfunction .) NO : Replace. Then go to Step 5. STEP 5. Retest the system. YES : The procedure is complete. SWITCH TESTER SPECIFIED At the "OFF" 1 − 4 2 − 4 Open circuit At the "LO" 2 − 4 Less than 2 ohms At the "HI" 1 − 4 Less than 2 ohms AC002861 LO OFF HI AC AC002863AB |