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EC-148 < COMPONENT DIAGNOSIS > [QR25DE] P0101 MAF SENSOR 1. Turn ignition switch OFF. 2. Reconnect all harness connectors disconnected. 3. Lift up the vehicle. 4. Turn ignition switch ON. 5. Connect CONSULT-III and select “DATA MONITOR” mode. 6. Select “MAS A/F SE-B1” and check indication. 7. Activate “INSPECTION MODE 1” ( ) to start engine, and warm up engine to normal operating temperature. 8. Depress the accelerator pedal and keep it. 9. Shift the selector lever to N position with engine running. CAUTION: Never leave the selector lever in the N position for a long period of time. In the N position, the engine operates but electricity cannot be generated. 10. Select “MAS A/F SE-B1” in “DATA MONITOR” and check indication. 11. Shift the selector lever to P position. 12. Fully depress the accelerator pedal and keep it. 13. Check indication. 14. Fully release accelerator pedal then fully depress it. 15. Check for linear voltage rise in response to engine being increased to about 2,500 rpm. Without CONSULT-III 1. Turn ignition switch OFF. 2. Reconnect all harness connectors disconnected. 3. Lift up the vehicle. 4. Turn ignition switch ON. 5. Check the voltage between ECM harness connector and ground. 6. Activate “INSPECTION MODE 1” ( ) to start engine, and warm up engine to normal operating temperature. 7. Depress the accelerator pedal and keep it. 8. Shift the selector lever to N position with engine running. CAUTION: Never leave the selector lever in the N position for a long period of time. In the N position, the engine operates but electricity cannot be generated. Monitor item Condition MAS A/F SE-B1 MAS A/F SE-B1 Ignition switch ON Approx. 0.4 V Monitor item Condition MAS A/F SE-B1 MAS A/F SE-B1 Idle (Engine is warmed-up to normal operat- 0.9 - 1.2 V Monitor item Condition MAS A/F SE-B1 MAS A/F SE-B1 2,500 rpm (Engine is warmed-up to normal 1.5 - 1.8 V ECM Ground Condition Voltage Connector Terminal F13 58 (MAF sensor signal) Ground Ignition switch ON Approx. 0.4 V JMBIA1631ZZ |