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EC-162 < COMPONENT DIAGNOSIS > [VQ35HR] P0101, P010B MAF SENSOR Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 2. 2. CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR 1. Turn ignition switch OFF. 2. Check for the cause of uneven air flow through mass air flow sensor. Refer to the following. - Crushed air ducts - Malfunctioning seal of air cleaner element - Uneven dirt of air cleaner element - Improper specification of intake air system parts Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. CHECK MASS AIR FLOW SENSOR-II With CONSULT-III 1. Repair or replace malfunctioning part. 2. Start engine and warm it up to normal operating temperature. 3. Connect CONSULT-III and select “DATA MONITOR” mode. 4. Select “MAS A/F SE-B1” and “MAS A/F SE-B2”, and check the indication. *: Check for linear voltage rise in response to engine being increased to about 4,000 rpm. Without CONSULT-III 1. Repair or replace malfunctioning part. 2. Start engine and warm it up to normal operating temperature. 3. Check the voltage between ECM harness connector terminals under the following conditions. *: Check for linear voltage rise in response to engine being increased to about 4,000 rpm. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 4. Monitor item Condition Indication (V) MAS A/F SE-B1 Ignition switch ON (Engine stopped.) Approx. 0.4 Idle (Engine is warmed-up to normal operating temperature.) 0.8 - 1.1 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.4 - 1.7 Idle to about 4,000 rpm 0.8 - 1.1 to Approx. 2.4* ECM Condition Voltage (V) Connector + – Terminal Terminal F102 77 [MAF sensor (bank 1) signal] 68 Ignition switch ON (Engine stopped.) Approx. 0.4 Idle (Engine is warmed-up to normal operat- 0.8 - 1.1 2,500 rpm (Engine is warmed-up to normal 1.4 - 1.7 Idle to about 4,000 rpm 0.8 - 1.1 to Approx. 2.4* 79 [MAF sensor (bank 2) signal] 94 Ignition switch ON (Engine stopped.) Approx. 0.4 Idle (Engine is warmed-up to normal operat- 0.8 - 1.1 2,500 rpm (Engine is warmed-up to normal 1.4 - 1.7 Idle to about 4,000 rpm 0.8 - 1.1 to Approx. 2.4* |