DTC Confirmation Procedure

TESTING CONDITION: 

Before performing the following procedure, confirm that battery voltage is more than 11V at idle. 

With CONSULT-III

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.
4. Let engine idle for 1 minute.
5. Select "A/F SEN1(B1) P1278/P1279" of "A/F SEN1" in "DTC WORK SUPPORT" mode with CONSULT-III.
6. Touch "START".

   If "COMPLETED" appears on CONSULT-III screen, go to step  10.

   If "COMPLETED" does not appear on CONSULT-III screen, go to the following step.

7. After perform the following procedure, "TESTING" will be displayed on the CONSULT-III screen.
   1. Increase the engine speed up to 4,000 to 5,000 rpm and keep it for 10 seconds.
   2. Fully release accelerator pedal and then let engine idle for about 10 seconds.

      If "TESTING" is not displayed after 10 seconds,  refer to ECU DIAGNOSIS .

8. Wait for about 20 seconds at idle at under the condition that "TESTING" is displayed on the CONSULT-III screen.
9. Make sure that "TESTING" changes to "COMPLETED".

   If "TESTING" changed to "OUT OF CONDITION",  refer to ECU DIAGNOSIS .

10. Make sure that "OK" is displayed after touching "SELF-DIAG RESULT".

    If "NG" is displayed, go to "DIAGNOSIS PROCEDURE ".

WITH GST

1. Start engine and warm it up to normal operating temperature.
2. Select Service $01 with GST.
3. Calculate the total value of "Short term fuel trim" and "Long term fuel trim" indications.

   Make sure that the total percentage should be within ±15%.

   If OK, go to the following step.

   If NG, check the following.

   • Intake air leaks
   • Exhaust gas leaks
   • Incorrect fuel pressure
   • Lack of fuel
   • Fuel injector
   • Incorrect PCV hose connection
   • PCV valve
   • Mass air flow sensor
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1minute under no load.
6. Let engine idle for 1 minute.
7. Increase the engine speed up to 4,000 to 5,000 rpm and keep it for 10 seconds.
8. Fully release accelerator pedal and then let engine idle for about 1 minute.
9. Select Service $07 with GST.

   If the 1st trip DTC is displayed, go to "DIAGNOSIS PROCEDURE ".