Infiniti F50. Manual - part 355

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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Driving Pattern

PBIB1053E

EC-62

ON BOARD DIAGNOSTIC (OBD) SYSTEM

●

The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driv-
ing habits, etc.
Zone A refers to the range where the time, required for the diagnosis under normal conditions*, is the
shortest.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed
within zone A.

*: Normal conditions refer to the following:

●

Sea level

●

Flat road

●

Ambient air temperature: 20 - 30

°

C (68 - 86

°

F)

●

Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30

°

C (68 - 86

°

F)], diag-

nosis may also be performed.

Pattern 1:

●

The engine is started at the engine coolant temperature of 

−

10 to 35

°

C (14 to 95

°

F)

(where the voltage between the ECM terminal 121 and ground is 3.0 - 4.3V).

●

The engine must be operated at idle speed until the engine coolant temperature is greater than
70

°

C (158

°

F) (where the voltage between the ECM terminal 121 and ground is lower than 1.4V).

●

The engine is started at the fuel tank temperature of warmer than 0

°

C (32

°

F) (where the voltage

between the ECM terminal 92 and ground is less than 4.1V).

Pattern 2:

●

When steady-state driving is performed again even after it is interrupted, each diagnosis can be con-
ducted. In this case, the time required for diagnosis may be extended.

Pattern 3:

●

The driving pattern outlined in *2 must be repeated at least 3 times.

Pattern 4:

●

Tests are performed after the engine has been operated for at least 17 minutes.

●

The accelerator pedal must be held very steady during steady-state driving.

●

If the accelerator pedal is moved, the test must be conducted all over again.

*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal
and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h
(56 MPH) again.
*2: Operate the vehicle in the following driving pattern.

1.

Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.

2.

Repeat driving pattern shown at right at least 10 times.

–

During acceleration, hold the accelerator pedal as steady as
possible.

*3: Checking the vehicle speed with GST is advised.

Suggested Transmission Gear Position
Set the selector lever in the “D” position.

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

The following is the information specified in Mode 6 of SAE J1979.
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.
Items for which these data (test value and test limit) are displayed are the same as SRT code items (30 test
items).
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be dis-
played on the GST screen.

SEF414S

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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EC

×

: Applicable

—: Not applicable

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC

 WIth CONSULT-II

The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased individu-
ally from the ECM and TCM (Transmission control module).

NOTE:
If the DTC is not for A/T related items (see 

EC-9, "INDEX FOR DTC"

 ), skip steps 2 through 4.

1.

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.

SRT item

Self-diagnostic test item

Test value (GST display)

Test limit

Application

TID

CID

CATALYST

Three way catalyst function (Bank 1)

01H

01H

Max.

×

02H

81H

Min.

×

Three way catalyst function (Bank 2)

03H

02H

Max.

×

04H

82H

Min.

×

EVAP SYSTEM

EVAP control system (Small leak)

05H

03H

Max.

×

EVAP control system purge flow monitoring

06H

83H

Min.

×

EVAP control system (Very small leak)

07H

03H

Max.

×

HO2S

Heated oxygen sensor 1 (Bank 1)

09H

04H

Max.

×

0AH

84H

Min.

×

0BH

04H

Max.

×

0CH

04H

Max.

×

0DH

04H

Max.

×

Heated oxygen sensor 1 (Bank 2)

11H

05H

Max.

×

12H

85H

Min.

×

13H

05H

Max.

×

14H

05H

Max.

×

15H

05H

Max.

×

Heated oxygen sensor 2 (Bank 1)

19H

86H

Min.

×

1AH

86H

Min.

×

1BH

06H

Max.

×

1CH

06H

Max.

×

Heated oxygen sensor 2 (Bank 2)

21H

87H

Min.

×

22H

87H

Min.

×

23H

07H

Max.

×

24H

07H

Max.

×

HO2S HTR

Heated oxygen sensor 1 heater (Bank 1)

29H

08H

Max.

×

2AH

88H

Min.

×

Heated oxygen sensor 1 heater (Bank 2)

2BH

09H

Max.

×

2CH

89H

Min.

×

Heated oxygen sensor 2 heater (Bank 1)

2DH

0AH

Max.

×

2EH

8AH

Min.

×

Heated oxygen sensor 2 heater (Bank 2)

2FH

0BH

Max.

×

30H

8BH

Min.

×

EC-64

ON BOARD DIAGNOSTIC (OBD) SYSTEM

2.

Turn CONSULT-II “ON” and touch “A/T”.

3.

Touch “SELF-DIAG RESULTS”.

4.

Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK”
twice.

5.

Touch “ENGINE”.

6.

Touch “SELF-DIAG RESULTS”.

7.

Touch “ERASE”. (The DTC in the ECM will be erased.)

 With GST

The emission related diagnostic information in the ECM can be erased by selecting Mode 4 with GST.

NOTE:
If the DTC is not for A/T related items (see 

EC-9, "INDEX FOR DTC"

 ), skip step 2.

1.

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.

2.

Perform 

AT-40, "HOW TO ERASE DTC (WITH GST)"

 . (The DTC in TCM will be erased.)

3.

Select Mode 4 with GST (Generic Scan Tool).

 No Tools

NOTE:
If the DTC is not for A/T related items (see 

EC-9, "INDEX FOR DTC"

 ), skip step 2.

1.

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.

2.

Perform 

AT-41, "HOW TO ERASE DTC (NO TOOLS)"

 . (The DTC in TCM will be erased.)

3.

Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to

EC-66, "HOW TO SWITCH DIAGNOSTIC TEST MODE"

 .

SEF823YA