Caution / Notice / Hint

HINT: 

• Refer to "Data List / Active Test" [A/F Heater Duty #1].

  Refer to DATA LIST / ACTIVE TEST [12/2012 - ]

• Sensor 1 refers to the sensor closest to the engine assembly.
• Sensor 2 refers to the sensor farthest away from the engine assembly.
• Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.
• Change the fuel injection volume using the Control the Injection Volume function provided in the Active Test and monitor the air fuel ratio sensor output voltage (Refer to CAUTION / NOTICE / HINT ). If the sensor output voltage does not change (almost no reaction) while performing the Active Test, the sensor may be malfunctioning.