DTC Confirmation Procedure
- PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
GO TO 2.
- DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A
- Start engine and warm it up to the normal operating temperature.
- Turn ignition switch OFF and wait at least 10 seconds.
- Restart engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
- Check 1st trip DTC.
Is 1st trip DTC detected?
YES
Proceed to Diagnosis Procedure .
NO
With CONSULT: GO TO 3.
NO
Without CONSULT: GO TO 5.
- DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-1
With CONSULT
Test condition: For better results, perform "DTC WORK SUPPORT" at a temperature of 0 to 30 deg.C (32 to 86 deg.F).
- Turn ignition switch ON and select "DATA MONITOR" mode of "ENGINE" using CONSULT.
- Start engine and warm it up to the normal operating temperature.
- Turn ignition switch OFF and wait at least 10 seconds.
- Restart 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 that "COOLANT TEMP/S" indicates more than 70 deg.C (158 deg.F).
If not, warm up engine and go to next step when "COOLANT TEMP/S" indication reaches 70 deg.C (158 deg.F).
- Open engine hood.
- Select "HO2S2 (B1) P1146" of "HO2S2" in "DTC WORK SUPPORT" mode of "ENGINE" using CONSULT.
- Follow the instruction of CONSULT display.NOTE: It will take at most 10 minutes until "COMPLETED"is displayed.
- Touch "SELF-DIAG RESULTS".
Which is displayed on CONSULT screen?
OK-1
To check malfunction symptom before repair: Refer to Intermittent Incident .
OK-2
Confirmation after repair: INSPECTION END
NG
Proceed to Diagnosis Procedure .
CAN NOT BE DIAGNOSED
GO TO 4.
- DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B-2
- Turn ignition switch OFF and leave the vehicle in a cool place (soak the vehicle).
- Perform DTC confirmation procedure again.
GO TO 3.
- 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.
- Start engine and warm it up to the normal operating temperature.
- Turn ignition switch OFF and wait at least 10 seconds.
- Restart 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 conditions.
ECM
Condition
Voltage
Connector
+
-
Terminal
F52
77
76
Revving up to 4, 000 rpm quickly under no load at least 10 times. (Depress and release the accelerator pedal as quickly as possible.)
The voltage should be below 0.18 V at least once during this procedure.
Is the inspection result normal?
YES
To check malfunction symptom before repair: Refer to Intermittent Incident .
YES
Confirmation after repair: INSPECTION END
NO
GO TO 6.
- PERFORM COMPONENT FUNCTION CHECK-2
Check the voltage between ECM harness connector terminals under the following conditions.
ECM
Condition
Voltage
Connector
+
-
Terminal
F52
77
76
Keeping engine at idle for 10 minutes.
The voltage should be below 0.18 V at least once during this procedure.
Is the inspection result normal?
YES
To check malfunction symptom before repair: Refer to Intermittent Incident .
YES
Confirmation after repair: INSPECTION END
NO
GO TO 7.
- PERFORM COMPONENT FUNCTION CHECK-3
Check the voltage between ECM harness connector terminals under the following conditions.
CAUTION: Always drive vehicle at a safe speed.ECM
Condition
Voltage
Connector
+
-
Terminal
F52
77
76
Coasting from 80 km/h (50 MPH) in the D position.
The voltage should be below 0.18 V at least once during this procedure.
Is the inspection result normal?
YES
To check malfunction symptom before repair: Refer to Intermittent Incident .
YES
Confirmation after repair: INSPECTION END
NO
Proceed to Diagnosis Procedure .