Caution / Notice / Hint

HINT:

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.

PID Item/Simulation Item Used In Diagnosis

PID/DATA MONITOR ITEM TABLE

Item	Definition	Unit	Condition/Specification
Heated Exhaust Gas Oxygen Sensor (bank 1, sensor 1)	A/F sensor current	μA	Idle (after warm up): 0-50 μA Deceleration fuel cut (accelerator pedal released from engine speed of 4000 rpm or more): Approx. 3.84 mA

Intention of troubleshooting procedure
- Step 1-3
  - Perform an inspection of the A/F sensor and ECM-related connectors and wiring harnesses.
- Step 4
  - Perform a unit inspection of the A/F sensor.
- Step 5-6
  - Verify that the primary malfunction is resolved and there are no other malfunctions.