Heated Oxygen Sensor 1

With CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Select MANU TRIG and adjust TRIGGER POINT to 100% in DATA MONITOR mode with CONSULT-II.
3. Select HO2S1 (B1) and HO2S1 MNTR (B1).
4. Hold engine speed at 2,000 RPM under no load during the following steps.
5. Touch RECORD on CONSULT-II screen. See Figure .
6. Check the following.
   • HO2S1 MNTR (B1)/(B2) in DATA MONITOR mode changes from RICH to LEAN to RICH more than 5 times in 10 seconds.

     5 times (cycles) are counted as shown in Figure and Figure .

   • HO2S1 (B1)/(B2) voltage goes above 0.6V at least once.
   • HO2S1 (B1)/(B2) voltage goes below 0.3V at least once.
   • HO2S1 (B1)/(B2) voltage never exceeds 1.0V.

Without CONSULT-II 

1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 16 [HO2S1 (B1) signal] or 35 [HO2S1 (B2) signal] and ground. See Figure .
3. Check the following with engine speed held at 2,000 RPM constant under no load.
   • The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V more than 5 times within 10 seconds.
   • The maximum voltage is over 0.6V at least 1 time.
   • The minimum voltage is below 0.3V at least 1 time.
   • The voltage never exceeds 1.0V.
     1. 1 time: 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V
     2. 2 times: 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V --> 0.6 - 1.0V --> 0 - 0.3V
   CAUTION:

   • Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
   • Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.