P0141

System Description
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater (rear) corresponding to the engine speed.

Operation:

Consult-II Reference Value In Data Monitor Mode:

ECM Terminals And Reference Value:

On Board Diagnosis Logic:

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 5 seconds before conducting the next test.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5 V and 16 V at idle.

With CONSULT-II
1. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT-II.
2. Start engine.
3. Drive vehicle at a speed of more than 70 km/h (43 MPH) for 2 consecutive minutes.




4. Stop vehicle and let engine idle for at least 6 seconds.
5. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
- Follow the procedure "With CONSULT-II".

EC-HO2S2H-01:

EC-HO2S2H-01 Connector View:

Wiring Diagram

Super Multiple Junction Terminal Arrangements:

Steps 1 - 2:

Steps 3 - 6:

Diagnostic Procedure

Component Inspection

HEATED OXYGEN SENSOR 2 HEATER (REAR)

Check the following.
1. Check resistance between terminals 4 and 1.
Resistance: 2.3 - 4.3ohm at 25 °C (77 °F)







2. Check continuity.
If NG, replace the heated oxygen sensor 2 (rear).

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 J43897-18 or J-43897-12 and approved anti-seize lubricant.