DTC Confirmation Procedure

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:

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

Do you have M.U.T.-III SE? 

YES >>: GO TO 2 

NO >>: GO TO  6

With M.U.T.-III SE

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
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 about 3, 600 rpm and keep it for 10 seconds.
8. Fully release accelerator pedal and then let engine idle for about 1 minute.
9. Check the items status of "DATA MONITOR" as follows.
   NOTE: If "Active DTC" changed to "ABSNT", refer to COMPONENT FUNCTION CHECK .

   Data monitor item	Status
   A/F SEN1 DIAG3 (B1)	PRSNT

   Is "Active DTC" displayed on M.U.T.-III SE screen? 

   YES >>: GO TO  4

   NO >>: GO TO 3  .

With M.U.T.-III SE

Perform DTC confirmation procedure-1 again.

Is "Active DTC" displayed on M.U.T.-III SE screen? 

YES >>: GO TO 4  .

NO >>: Refer to COMPONENT FUNCTION CHECK .

With M.U.T.-III SE

1. Wait for about 20 seconds at idle.
2. Check the items status of "DATA MONITOR" as follows.
   NOTE: If "CMPLT" changed to "INCMP", refer to COMPONENT FUNCTION CHECK .

   Data monitor item	Status
   A/F SEN1 DIAG1 (B1)	CMPLT
   A/F SEN1 DIAG2 (B1)

   Is "CMPLT" displayed on M.U.T.-III SE screen? 

   YES >>: GO TO 5 

   NO >>: Refer to COMPONENT FUNCTION CHECK .

With M.U.T.-III SE

Check the "SELF-DIAG RESULT".

Is any DTC detected? 

YES >>: Proceed to DTC DIAGNOSIS PROCEDURE .

NO >>: INSPECTION END

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.

Is the total percentage within ±15%? 

YES >>: GO TO  8

NO >>: GO TO 7 

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

>>: Repair or replace malfunctioning part.

1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Start engine and keep the engine speed between 3, 500 and 4, 000 rpm for at least 1 minute under no load.
5. Let engine idle for 1 minute.
6. Increase the engine speed up to about 3, 600 rpm and keep it for 10 seconds.
7. Fully release accelerator pedal and then let engine idle for about 1 minute.
8. Check 1st trip DTC.

Is 1st trip DTC detected? 

YES >>: Proceed to DTC DIAGNOSIS PROCEDURE .

NO-1 >>: To check malfunction symptom before repair: Refer to INTERMITTENT INCIDENT .

NO-2 >>: Confirmation after repair: INSPECTION END