Nissan Teana J32. Manual - part 392

 

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Nissan Teana J32. Manual - part 392

 

 

EC-106

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

If one or more SRT related self-diagnoses show NG results in 2 consecutive cycles, the SRT will also indicate
“CMPLT”. 

 Case 3 above

The table above shows that the minimum number of cycles for setting SRT as “INCMP” is the number one (1)
for each self-diagnosis (Case 1 & 2) or the number two (2) for one of self-diagnoses (Case 3). However, in
preparation for the state emissions inspection, it is unnecessary for each self-diagnosis to be executed twice
(Case 3) for the following reasons:
• The SRT will indicate “CMPLT” at the time the respective self-diagnoses have one (1) OK result.
• The emissions inspection requires “CMPLT” of the SRT only with OK self-diagnosis results.
• During SRT driving pattern, the 1st trip DTC (NG) is detected prior to “CMPLT” of SRT and the self-diagnosis

memory must be erased from the ECM after repair.

• If the 1st trip DTC is erased, all the SRT will indicate “INCMP”.

NOTE:
SRT can be set as “CMPLT” together with the DTC(s). Therefore, DTC check must always be carried out
prior to the state emission inspection even though the SRT indicates “CMPLT”.

SRT Service Procedure

If a vehicle has failed the state emissions inspection due to one or more SRT items indicating “INCMP”, review
the flowchart diagnostic sequence on the next figure.

*1

“How to Read DTC and 1st Trip DTC” *2

“How to Display SRT Status”

*3

“How to Set SRT Code”

PBIB2320E

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-107

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

D

E

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How to Display SRT Status

WITH CONSULT-III

Selecting “SRT STATUS” in “DTC CONFIRMATION” mode with CONSULT-III.
For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT-III screen; for items whose SRT
codes are not set, “INCMP” is displayed.
NOTE:
Though displayed on the CONSULT-III screen, “HO2S HTR” is not SRT item.

WITH GST

Selecting Service $01 with GST (Generic Scan Tool)

MALFUNCTION INDICATOR (MI)

Description

The MI is located on the instrument panel.

1.

The MI will illuminate when the ignition switch is turned ON with-
out the engine running. This is a bulb check.
If the MI does not illuminate, check MI circuit. Refer to 

EC-346,

"Component Function Check"

.

2.

When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.

On Board Diagnostic System Function

The on board diagnostic system has the following three functions.

Diagnostic Test Mode I — Bulb Check

In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check MI circuit. Refer to 

EC-

346, "Component Function Check"

.

Diagnostic Test Mode I — Malfunction Warning

SAT652J

Diagnostic Test 
Mode

KEY and ENG. 
Status

Function

Explanation of Function

Mode I

Ignition switch in 
ON position 

Engine stopped

BULB CHECK

This function checks the MI bulb for damage (blown, open 
circuit, etc.).
If the MI does not come on, check MI circuit.

Engine running

MALFUNCTION
WARNING

When a malfunction is detected twice in two consecutive 
driving cycles (two trip detection logic), the MI will illuminate 
to inform the driver that a malfunction has been detected.
The following malfunctions will illuminate or blink the MI in 
the 1st trip.
• Misfire (Possible three way catalyst damage)
• One trip detection diagnoses

Mode II

Ignition switch in 
ON position 

Engine stopped

SELF-DIAGNOSTIC
RESULTS

This function allows DTCs and 1st trip DTCs to be read.

EC-108

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

This DTC number is clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

Diagnostic Test Mode II — Self-diagnostic Results

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MI as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MI does not illuminate in diagnostic test mode
I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MI illumi-
nates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are dis-
played, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These unidentified
codes can be identified by using the CONSULT-III or GST. A DTC will be used as an example for how to read
a code.

A particular trouble code can be identified by the number of four-digit numeral flashes as per the following.

The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds consisting of an ON (0.6-sec-
onds) - OFF (0.6-seconds) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-seconds ON and 0.3-seconds OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-seconds OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC 0000 refers to no mal-
function. (See 

EC-389, "DTC Index"

)

How to Switch Diagnostic Test Mode

NOTE:
• It is better to count the time accurately with a clock.

MI

Condition

ON

When the malfunction is detected.

OFF

No malfunction.

JMBIA1140GB

Number

0

1

2

3

4

5

6

7

8

9

A

B

C

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E

F

Flashes

10

1

2

3

4

5

6

7

8

9

11

12

13

14

15

16

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-109

< FUNCTION DIAGNOSIS >

[VQ25DE, VQ35DE]

C

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EC

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• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has

a malfunction.

• ECM always returns to Diagnostic Test Mode I after the ignition switch is turned OFF.
HOW TO SET DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS)
1.

Confirm that accelerator pedal is fully released, turn ignition switch ON and wait 3 seconds.

2.

Repeat the following procedure quickly 5 times within 5 seconds.

-

Fully depress the accelerator pedal.

-

Fully release the accelerator pedal.

3.

Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approx. 10 seconds until the
MI starts blinking.
NOTE:
Do not release the accelerator pedal for 10 seconds if MI starts blinking during this period. This
blinking is displaying SRT status and is continued for another 10 seconds.

4.

Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
NOTE:
Wait until the same DTC (or 1st trip DTC) appears to completely confirm all DTCs.

HOW TO ERASE DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS)
1.

Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to “How to Set Diagnostic Test Mode II
(Self-diagnostic Results)”.

2.

Fully depress the accelerator pedal and keep it depressed for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.

3.

Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.

• If the battery is disconnected, the DTC will be lost from the backup memory within 24 hours.
• Be careful not to erase the stored memory before starting trouble diagnoses.

OBD System Operation Chart

Relationship Between MI, 1st Trip DTC, DTC, and Detectable Items

• When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are

stored in the ECM memory.

• When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are

stored in the ECM memory, and the MI will come on.

• The MI will go off after the vehicle is driven 3 times (driving pattern B) with no malfunction. A drive is counted

only when the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while
counting, the counter will reset.

• The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A) with-

out the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel Injec-
tion System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (driving pattern
C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC RESULTS” mode of CON-
SULT-III will count the number of times the vehicle is driven.

• The 1st trip DTC is not displayed when the self-diagnosis results in OK for the 2nd trip.

Summary Chart

PBIB0092E

Items

Fuel Injection System

Misfire

Other

MI (turns off)

3 (pattern B)

3 (pattern B)

3 (pattern B)

DTC, Freeze Frame Data (no 
display)

80 (pattern C)

80 (pattern C)

40 (pattern A)

 

 

 

 

 

 

 

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