Confirmation Procedure
- DTC PRIORITY
If DTC P0159 is detected with DTC P0157 or P0158, first perform the confirmation procedure (trouble diagnosis) for DTC P0157 or P0158.
Is DTC P0157 or P0158 detected?
YES
Perform diagnosis of applicable.
- P0157: Refer to DTC Description .
- P0158: Refer to DTC Description .
NO
GO TO 2.
- INSPECTION START
Do you have CONSULT?
YES
GO TO 3.
NO
GO TO 8.
- PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
For better results, perform "DTC WORK SUPPORT" at a temperature of 0 to 30 deg.C (32 to 86 deg.F).
GO TO 4.
- PERFORM DTC CONFIRMATION PROCEDURE
With CONSULT
- Turn ignition switch ON.
- On CONSULT screen, select "ENGINE">>"Data Monitor".
- Start engine and warm it up to the normal operating temperature.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
- Start engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
- Let engine idle for 1 minute.
- Make sure that "COOLAN TEMP/S" indicates more than 70 deg.C (158 deg.F).
- Drive the vehicle in a proper gear at 60 km/h (38MPH) and maintain the speed.CAUTION: Always drive vehicle at a safe speed.
- Release the accelerator pedal fully at least 5 seconds.CAUTION:
- Enable the engine brake.
- Always drive carefully.
- Never apply brake when releasing the accelerator pedal.
- Repeat step 9 and 10 at least 8 times.
- Check the following item of "Data Monitor".
Data monitor item
Status
HO2 S2 DIAG1 (B2)
CMPLT
HO2 S2 DIAG2 (B2)
Is "CMPLT" displayed on CONSULT screen?
YES
GO TO 6.
NO
Perform DTC confirmation procedure again.
NO
GO TO 5.
- PERFORM DTC WORK SUPPORT
- Open engine hood.
- On CONSULT screen, select "ENGINE">>"DTC Work Support">>"HO2S2">>"HO2S2 (B2) P0159".
- Start engine and follow the instruction of CONSULT display.NOTE: It will take at most 10 minutes until "COMPLETED" is displayed.
Is "COMPLETED" displayed on CONSULT screen?
YES
GO TO 7.
NO
GO TO 6.
- PERFORM DTC CONFIRMATION PROCEDURE AGAIN
- Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
- Perform DTC confirmation procedure again.
GO TO 4.
- PERFORM SELF-DIAGNOSIS
Perform ECM self-diagnosis.
Is DTC P0159 detected?
YES
Refer to DTC Diagnosis Procedure .
NO
To check malfunction symptom before repair: Refer to Inspection .
NO
Confirmation after repair: INSPECTION END
- PERFORM COMPONENT FUNCTION CHECK-1 NOTE: Use component function check to check the overall function of the heated oxygen sensor 2 circuit. During this check, a 1st trip DTC might not be confirmed.
Without CONSULT
- Start engine and warm it up to the normal operating temperature.
- Turn ignition switch OFF and wait at least 10 seconds.
- Start engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
- Let engine idle for 1 minute.
- Check the voltage between ECM harness connector terminals under the following condition.
ECM
Condition
Voltage
Connector
+
-
Terminal
F143
51
81
Revving up to 4, 000 rpm under no load at least 10 times
A change of voltage should be more than 0.56 V for 1 second during this procedure.
Is the inspection result normal?
YES
To check malfunction symptom before repair: Refer to Inspection .
YES
Confirmation after repair: INSPECTION END
NO
GO TO 9.
- PERFORM COMPONENT FUNCTION CHECK-2
Check the voltage between ECM harness connector terminals under the following condition.
ECM
Condition
Voltage
Connector
+
-
Terminal
F143
51
81
Keeping engine at idle for 10 minutes
A change of voltage should be more than 0.56 V for 1 second during this procedure.
Is the inspection result normal?
YES
To check malfunction symptom before repair: Refer to Inspection .
YES
Confirmation after repair: INSPECTION END
NO
GO TO 10.
- PERFORM COMPONENT FUNCTION CHECK-3
Check the voltage between ECM harness connector terminals under the following condition.
ECM
Condition
Voltage
Connector
+
-
Terminal
F143
51
81
Coasting from 80 km/h (50 MPH) on the suitable gear position
A change of voltage should be more than 0.56 V for 1 second during this procedure.
Is the inspection result normal?
YES
To check malfunction symptom before repair: Refer to Inspection .
YES
Confirmation after repair: INSPECTION END
NO
Refer to DTC Diagnosis Procedure .