Camry Sedan L4-2.4L (2AZ-FE) (2003)
Oxygen Sensor: Testing and Inspection
Air-Fuel Ratio (A/F) Sensor
1. INSPECT AIR-FUEL RATIO COMPENSATION SYSTEM
a. Measure voltage between terminals of the engine ECM.
CAUTION: Connect test leads from the back side of the connector with the ECM connected.
HINT:
Voltage between terminals of the engine ECM is kept constant regardless of the voltage of A/F sensor.
b. Connect the hand-held tester to the DLC3.
c. Select "DATA MONITOR" - "A/FS B1 S1", "A/FS B2 S1" and "O2S B1 S2" to display the monitor.
d. Warm up the A/F sensor with the engine speed at 2,500 rpm for approx. 2 minutes.
e. Keep the engine speed at 2,500 rpm and confirm that the displays of "A/FS B1 S1" and "A/FS B2 S1" are as shown in the illustration.
CAUTION: The illustration differs from the real display.
Only hand-held tester displays the waveform of A/F sensor.
f.
Confirm that the display of "O2S B1 S2" changes between 0 V to 1 V with the engine speed at 2,500 rpm.