|
|
EC-186 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0102, P0103 MAF SENSOR YES >> GO TO 7. NO >> Repair open circuit, short to ground or short to power in harness or connectors. 7. CHECK MASS AIR FLOW SENSOR Check mass air flow sensor. Refer to EC-186, "Component Inspection" . Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-42, "Intermittent Incident" . NO >> Replace mass air flow sensor. Refer to . Component Inspection INFOID:0000000009651039 1. CHECK MASS AIR FLOW SENSOR-I With CONSULT 1. Reconnect all harness connectors disconnected. 2. Start engine and warm it up to normal operating temperature. 3. Connect CONSULT and select “DATA MONITOR” mode. 4. Select “MAS A/F SE-B1” and check indication under the following conditions. *: Check for linear voltage rise in response to engine being increased to approximately 4,000 rpm. Without CONSULT 1. Reconnect all harness connectors disconnected. 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 approximately 4,000 rpm. Is the inspection result normal? YES >> INSPECTION END NO >> GO TO 2. 2. CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR Check for the cause of uneven air flow through mass air flow sensor. Refer to the following. Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. CHECK MASS AIR FLOW SENSOR-II Monitor item Condition MAS A/F SE-B1 (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 - 1.2 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9 Idle to approximately 4,000 rpm 0.8 - 1.2 to Approx. 2.4* ECM Condition Voltage (V) Connector + – Terminal Terminal F8 82 (MAF sen- 80 (Sensor Ignition switch ON (Engine stopped.) Approx. 0.4 Idle (Engine is warmed-up to normal operating temperature.) 0.8 - 1.2 2,500 rpm (Engine is warmed-up to normal operating temperature.) 1.6 - 1.9 Idle to approximately 4,000 rpm 0.8 - 1.2 to Approx. 2.4* |