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EC-614 < COMPONENT DIAGNOSIS > [HR16DE (WITHOUT EURO-OBD)] HO2S1 HEATER NO >> Repair or replace ground connection. 2. CHECK HO2S1 POWER SUPPLY CIRCUIT 1. Disconnect HO2S1 harness connector. 2. Turn ignition switch ON. 3. Check the voltage between HO2S1 harness connector and ground. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. DETECT MALFUNCTIONING PART Check the following. >> Repair or replace harness or connectors. 4. CHECK HO2S1 HEATER OUTPUT SIGNAL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between HO2S1 harness connector and ECM harness connector. 4. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 5. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 5. CHECK HO2S1 HEATER EC-615, "Component Inspection" Is the inspection result normal? YES >> GO TO 7. NO >> GO TO 6. 6. REPLACE HEATED OXYGEN SENSOR 1 Replace Heated oxygen sensor 1. CAUTION: • Discard any heated oxygen sensor 1 which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one. • Before installing new heated oxygen sensor 1, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool and approved anti-seize lubricant. >> INSPECTION END 7. CHECK INTERMITTENT INCIDENT Perform GI-55, "Intermittent Incident" . >> Repair or replace. HO2S1 Ground Voltage Connector Terminal F30 2 Ground Battery voltage HO2S1 ECM Continuity Connector Terminal Connector Terminal F30 3 F7 3 Existed |