Maxima SE V6-3.0L (VQ30DE) (1998)
Oxygen Sensor: Component Tests and General Diagnostics
Front Heated Oxygen Sensor
COMPONENT INSPECTION
Front heated oxygen sensor
With CONSULT
(1) Start engine and warm it up to normal operating temperature.
(2) Select "MANU TRIG" and "HI SPEED" in "DATA MONITOR" mode with CONSULT, and select "FR O2 SEN-B1 (-B2)" and "FR O2
MNTR-B1 (-B2)".
(3) Hold engine speed at 2,000 rpm under no load during the following steps.
(4) Touch "RECORD" on CONSULT screen.
(5) Check the following.
*
"FR O2 MNTR-B1 (-B2)" in "DATA MONITOR" mode changes from "RICH" to "LEAN" to "RICH" 5 times in 10 seconds.
5 times (cycles) are counted as shown below:
Cycle | 1 | 2 | 3 | 4 | 5 |
FR O2 MNTR-B1 R-L-R-L-R-L-R-L-R-L-R
R = "FR O2 MNTR-B1 (-B2)", "RICH"
L = "FR O2 MNTR-B1 (-B2)", "LEAN"
*
"FR O2 SEN-B1 (-B2)" voltage goes above 0.6 V at least once.
*
"FR O2 SEN-B1 (-B2)" voltage goes below 0.35 V at least once.
*
"FR O2 SEN-B1 (-B2)" voltage never exceeds 1.0 V.
- - OR - -
Without TOOLS
(1) Start engine and warm it up to normal operating temperature.