|
|
EC-242 < DTC/CIRCUIT DIAGNOSIS > [HR16DE] P014C, P014D, P015A, P015B, A/F SENSOR 1 Diagnosis Procedure INFOID:0000000009020748 1. CHECK GROUND CONNECTION 1. Turn ignition switch OFF. 2. Check ground connection E15. Refer to GI-41, "Intermittent Incident" . Is the inspection result normal? YES >> GO TO 2. NO >> Repair or replace ground connection. 2. RETIGHTEN A/F SENSOR 1 Loosen and retighten the A/F sensor 1. Refer to >> GO TO 3. 3. CHECK EXHAUST GAS LEAK 1. Start engine and run it at idle. 2. Listen for an exhaust gas leak before three way catalyst (manifold). Is exhaust gas leak detected? YES >> Repair or replace. NO >> GO TO 4. 4. CHECK FOR INTAKE AIR LEAK Listen for an intake air leak after the mass air flow sensor. YES >> Repair or replace. NO >> GO TO 5. 5. CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE 1. Clear the mixture ratio self-learning value. Refer to . 2. Run engine for at least 10 minutes at idle speed. Is the 1st trip DTC P0171 or P172 detected? Is it difficult to start engine? YES >> Perform trouble diagnosis for DTC P0171 or P0172. Refer to NO >> GO TO 6. 6. CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT 1. Disconnect A/F sensor 1 harness connector. 2. Turn ignition switch ON. 3. Check the voltage between A/F sensor 1 harness connector and ground. Is the inspection result normal? YES >> GO TO 8. PBIB1216E A/F sensor 1 Ground Voltage Connector Terminal F12 4 Ground Battery voltage |