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P117A AIR FUEL RATIO EC-359 < DTC/CIRCUIT DIAGNOSIS > [QR25DE] C D E F G H I J K L M A EC N P O • Always drive vehicle at a safe speed. NOTE: • Drive the vehicle at approximately 88 km/h (55MPH) allows easy diagnosis. • Keep the accelerator pedal as possible during cruising. 3. Check “SYSTEM 1 DIAGNOSIS A B1” indication. YES >> GO TO 5. NO >> GO TO 2. 5. PERFORM DTC CONFIRMATION PROCEDURE-3 Check 1st trip DTC. YES >> Proceed to . NO >> INSPECTION END 6. PERFORM DTC CONFIRMATION PROCEDURE-4 Without CONSULT 1. Start the engine and warm it up to normal operating temperature. 2. Drive vehicle under the following conditions for at least 5 consecutive seconds. CAUTION: • Always drive vehicle at a safe speed. NOTE: • Drive the vehicle at approximately 88 km/h (55MPH) allows easy diagnosis. • Keep the accelerator pedal as possible during cruising. 3. Check 1st trip DTC. YES >> Proceed to . NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009481042 1. CHECK FOR INTAKE AIR LEAK 1. Stop engine and check the following for connection. - Air duct - Vacuum hoses - PCV hose - Intake air passage between air duct to intake manifold 2. Start engine and let it idle. 3. Listen for an intake air leak after the mass air flow sensor. ENG SPEED 1,200 – 1,900rpm COOLAN TEMP/S More than 80 °C (176°F) B/FUEL SCHDL A/T: 5 – 10 msec Selector lever A/T: D position SYSTEM 1 DIAGNOSIS B B1 PRSENT Engine speed 1,200 – 1,900rpm Calculated load value A/T: 23 – 63 % Selector lever A/T: D position |