Part 2

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Emission-related Diagnostic Information

PERMANENT DIAGNOSTIC TROUBLE CODE (PERMANENT DTC)

Permanent DTC is defined in SAE J1979/ISO 15031-5 Service $0A.
ECM stores a DTC issuing a command of turning on MIL as a permanent DTC and keeps storing the DTC as a permanent DTC until ECM judges that there is no presence of malfunction.
Permanent DTCs cannot be erased by using the Erase function of CONSULT or Generic Scan Tool (GST) and by disconnecting the battery to shut off power to ECM. This prevents a vehicle from passing the state emission inspection without repairing a malfunctioning part.
When not passing the state emission inspection due to more than one permanent DTC, permanent DTCs should be erased, referring to this manual.
NOTE:
- The important items in state emission inspection are that MIL is not ON, SRT test items are set, and permanent DTCs are not included.
- Permanent DTCs do not apply for regions that permanent DTCs are not regulated by law.
Permanent DTC Item
For permanent DTC items, MIL turns ON. , "EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS".
Permanent DTC Set Timing
The setting timing of permanent DTC is stored in ECM with the lighting of MIL when a DTC is confirmed.
Permanent DTC Service Procedure





How to Display Permanent DTC Status
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 "PERMANENT DTC STATUS" in "DTC & SRT CONFIRMATION" mode with CONSULT.
NOTE:
Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pattern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).

CAUTION:
Since the "PERMANENT DTC STATUS" screen displays the previous trip information, repeat the following twice to update the information: "Ignition switch OFF", "Wait for more than 10 seconds"
and "Ignition switch ON".





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 .

TEST VALUE AND TEST LIMIT (GST ONLY - NOT APPLICABLE TO CONSULT)

The following is the information specified in Service $06 of SAE J1979/ISO 15031-5.
The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the maximum or minimum value and is compared with the test value being monitored.
These data (test value and test limit) are specified by On Board Monitor ID (OBDMID), Test ID (TID), Unit and
Scaling ID and can be displayed on the GST screen.
The items of the test value and test limit will be displayed with GST screen which items are provided by the
ECM. (e.g., if bank 2 is not applied on this vehicle, only the items of bank 1 is displayed)































HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

How to Erase DTC





NOTE:
- If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10
seconds and then turn it ON (engine stopped) again.
- If the DTC is not for CVT related items, skip step 1.
1.Erase DTC in TCM.
2.Select "ENGINE" with CONSULT.
3.Select "SELF-DIAG RESULTS".
4.Touch "ERASE". (The DTC in the ECM will be erased.)
With GST
NOTE:
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.
1.Select Service $04 with GST.
No Tools
NOTE:
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.
1.Erase DTC in ECM. Refer to How to Erase Diagnostic Test Mode II (Self-diagnostic Results).
-If the battery is disconnected, the emission-related diagnostic information will be lost within 24 hours.
-The following data are cleared when the ECM memory is erased.
- Diagnostic trouble codes
- 1st trip diagnostic trouble codes
- Freeze frame data
- 1st trip freeze frame data
- System readiness test (SRT) codes
- Test values
How to Erase Permanent DTC
- When a DTC is stored in ECM and MIL is ON, a permanent DTC is erased with MIL shut off if the same malfunction is not detected after performing the driving pattern for MIL shut off three times in a raw.










- 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










Group A






*1: When the same malfunction is detected in two consecutive trips, MIL will illuminate.

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.Check permanent DTC. , "How to Display Permanent DTC Status".
6.Perform "DTC CONFIRMATION PROCEDURE" for DTCs which are the same as permanent DTCs stored in ECM.
7.Turn ignition switch OFF and wait at least 10 seconds.
8.Turn ignition switch ON.
9.Turn ignition switch OFF and wait at least 10 seconds.
10.Turn ignition switch ON.
11.Check permanent DTC. , "How to Display Permanent DTC Status".
12.Check that the permanent DTCs have been erased.
Group B










NOTE:
- Drive the vehicle according to only driving patterns indicating "INCMP" in driving patterns B and D on the
"PERMANENT DTC STATUS" screen.
- When experiencing both driving pattern B and D during the same trip, the experience of driving pattern D is counted by priority.
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.Check permanent DTC. , "How to Display Permanent DTC Status".
6.Start engine and warm it up to normal operating temperature.
7.Use "PERMANENT DTC WORK SUPPORT" to drive the vehicle according to 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 or D is reset.
- If self-diagnosis results are erased during the trip of driving pattern B or D, an experience of driving pattern B and D during the same trip is not counted up.
8.Turn ignition switch OFF and wait at least 10 seconds.
9.Turn ignition switch ON.
10.Turn ignition switch OFF and wait at least 10 seconds.
11.Turn ignition switch ON.
12.Check permanent DTC. , "How to Display Permanent DTC Status".
13.Drive the vehicle according to 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 or D is reset.
- If self-diagnosis results are erased during the trip of driving pattern B or D, an experience of driving pattern B and D during the same trip is not counted up.
14.Turn ignition switch OFF and wait at least 10 seconds.
15.Turn ignition switch ON.
16.Turn ignition switch OFF and wait at least 10 seconds.
17.Turn ignition switch ON.
18.Check permanent DTC. , "How to Display Permanent DTC Status".
19.Check that the permanent DTCs have been erased.
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.Check permanent DTC. , "How to Display Permanent DTC Status".
6.Start engine and warm it up to normal operating temperature.
7.Drive the vehicle according to 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 or D is reset.
- If self-diagnosis results are erased during the trip of driving pattern B or D, an experience of driving pattern B and D during the same trip is not counted up.
8.Turn ignition switch OFF and wait at least 10 seconds.
9.Turn ignition switch ON.
10.Turn ignition switch OFF and wait at least 10 seconds.
11.Turn ignition switch ON.
12.Check permanent DTC. , "How to Display Permanent DTC Status".
13.Drive the vehicle according to 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 or D is reset.
- If self-diagnosis results are erased during the trip of driving pattern B or D, an experience of driving pattern B and D during the same trip is not counted up.
14.Turn ignition switch OFF and wait at least 10 seconds.
15.Turn ignition switch ON.
16.Turn ignition switch OFF and wait at least 10 seconds.
17.Turn ignition switch ON.
18.Check permanent DTC. , "How to Display Permanent DTC Status".
19.Check that the permanent DTCs have been erased.
DRIVING PATTERN
- Driving pattern B means a trip satisfying the following conditions.
- Engine speed reaches 400 rpm or more.
- Water temperature reaches 70�C (158�F) ore more.
- Vehicle speed of 70 - 120 km/h (44 - 75 MPH) is maintained for 60 seconds or more under the control of closed loop.
- Vehicle speed of 30 - 60 km/h (19 - 37 MPH) is maintained for 10 seconds or more under the control of closed loop.
- Under the closed loop control condition, the following state reaches 12 seconds or more in total: Vehicle speed of 4 km/h (2 MPH) or less with idling condition.
- The state of driving at 10 km/h (7 MPH) or more reaches 10 minutes or more in total.
- A lapse of 22 minutes or more after engine start.

CAUTION:
Always drive at a safe speed.
NOTE:
- Drive the vehicle at a constant velocity.
- When the same malfunction is detected regardless of driving conditions, reset the counter of driving pattern
B.
- When the above conditions are satisfied without detecting the same malfunction, reset the counter of driving pattern B.
- Driving pattern D means operating vehicle as per the following.
- The state of driving at 40 km/h (25 MPH) reaches 300 seconds or more in total.
- Idle speed lasts 30 seconds or more.
- A lapse of 600 seconds or more after engine start.

CAUTION:
Always drive at a safe speed.
NOTE:
- When the same malfunction is detected regardless of driving conditions, reset the counter of driving pattern
D.
- When the above conditions are satisfied without detecting the same malfunction, reset the counter of driving pattern D.