How to Erase Permanent DTC

How to Erase Permanent DTC

Description

Outline

When a DTC is stored in ECM

When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL shutoff if the same malfunction is not detected after performing the driving pattern for MIL shutoff three times in a raw.

When a DTC is not stored in ECM

The erasing method depends on a permanent DTC stored in ECM. Refer to the following table.

NOTE:

If the applicable permanent DTC includes multiple groups, perform the procedure of Group B first. If the permanent DTC is not erased, perform the procedure of Group A.

x: Applicable -: Not applicable

*: For group, refer to [DTC Index: ECM] DTC Index ECM.

Permanent DTC Item

For permanent DTC items, MIL turns ON. Refer to [DTC Index: ECM] DTC Index ECM.

Permanent DTC Service Procedure

Work Procedure (Group A)

1. CHECK DTC

Check DTC.

Is any DTC detected?
YES
Repair malfunction(s) and erase DTC. Refer to [On Board Diagnosis Function] On Board Diagnosis Function.
NO
GO TO 2.

2. CHECK PERMANENT DTC

With SDT
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 Turn ignition switch ON.
5 Select "System readiness test results" in "Engine (GST Mode) Utility" mode with SDT.
With GST
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 Turn ignition switch ON.
5 Select Service $0A with GST.

Is any permanent DTC detected?
YES
GO TO 3.
NO
END

3. DRIVE DRIVING PATTERN B

CAUTION:
- Always drive at a safe speed.
- Never erase self-diagnosis results.
- If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving pattern B and D is reset.

With SDT
1 Start engine and warm it up to normal operating temperature.
2 Drive the vehicle according to driving pattern B. Refer to [Driving Pattern] Driving Pattern.
With GST
1 Start engine and warm it up to normal operating temperature.
2 Drive the vehicle according to driving pattern B. Refer to [Driving Pattern] Driving Pattern.

GO TO 4.

4. CHECK PERMANENT DTC

With SDT
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 Turn ignition switch ON.
5 Select "System readiness test results" in "Engine (GST Mode) Utility" mode with SDT.
With GST
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 Turn ignition switch ON.
5 Select Service $0A with GST.

Is any permanent DTC detected?
YES
GO TO 5.
NO
END

5. DRIVE DRIVING PATTERN D

CAUTION:
- Always drive at a safe speed.
- Never erase self-diagnosis results.
- If self-diagnosis results are erased during the trip of driving pattern B or D, the counter of driving pattern B and D is reset.

1 Drive the vehicle according to driving pattern D. Refer to [Driving Pattern] Driving Pattern.

GO TO 6.

6. CHECK PERMANENT DTC

With SDT
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 Turn ignition switch ON.
5 Select "System readiness test results" in "Engine (GST Mode) Utility" mode with SDT.
With GST
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 Turn ignition switch ON.
5 Select Service $0A with GST.

Is any permanent DTC detected?
YES
GO TO 1.
NO
END