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P2A00 A/F SENSOR 1 EC-941 < COMPONENT DIAGNOSIS > [QR25DE EXCEPT FOR CALIFORNIA] C D E F G H I J K L M A EC N P O 7. DETECT MALFUNCTIONING PART Check the following. • IPDM E/R harness connector F10 • 15A fuse (No. 37) • Harness for open or short between A/F sensor 1 and fuse >> Repair or replace harness or connectors. 8. CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector. 4. Check the continuity between ECM harness connector or A/F sensor 1 harness connector and ground. 5. Also check harness for short to power. YES >> GO TO 9. NO >> Repair open circuit or short to ground or short to power in harness or connectors. 9. CHECK A/F SENSOR 1 HEATER EC-686, "Component Inspection" Is the inspection result normal? YES >> GO TO 10. NO >> GO TO 11. 10. CHECK INTERMITTENT INCIDENT Perform GI-42, "Intermittent Incident" . Is the inspection result normal? YES >> GO TO 11. NO >> Repair or replace. 11. REPLACE AIR FUEL RATIO (A/F) SENSOR 1 Replace air fuel ratio (A/F) sensor 1. CAUTION: • Discard any sensor 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 sensor, clean exhaust system threads using oxygen sensor thread cleaner tool [commercial service tool: (J-43897-18) or (J-43897-12)] and approved anti-seize lubricant (commer- cial service tool). Do you have CONSULT-III? YES >> GO TO 12. NO >> GO TO 13. 12. CONFIRM A/F ADJUSTMENT DATA With CONSULT-III A/F sensor 1 ECM Continuity Connector Terminal Connector Terminal F44 1 F13 45 Existed 2 49 A/F sensor 1 ECM Ground Continuity Connector Terminal Connector Terminal F44 1 F13 45 Ground Not existed 2 49 |