Nissan Teana J32. Manual — part 396
EC-122
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Diagnosis Tool Function
INFOID:0000000003856504
DESCRIPTION
Generic Scan Tool (OBD II scan tool) complying with ISO 15031-5
has 8 different functions explained below.
ISO15765-4 is used as the protocol.
The name “GST” or “Generic Scan Tool” is used in this service man-
ual.
FUNCTION
INSPECTION PROCEDURE
1.
Turn ignition switch OFF.
2.
Connect “GST” to data link connector (1), which is located under
LH dash panel.
SEF139P
Diagnostic Service
Function
Service $01
READINESS TESTS
This diagnostic service gains access to current emission-related data values, including an-
alog inputs and outputs, digital inputs and outputs, and system status information.
Service $02
(FREEZE DATA)
This diagnostic service gains access to emission-related data value which were stored by
ECM during the freeze frame. For details, refer to
Service $03
DTCs
This diagnostic service gains access to emission-related power train trouble codes which
were stored by ECM.
Service $04
CLEAR DIAG INFO
This diagnostic service can clear all emission-related diagnostic information. This in-
cludes:
• Clear number of diagnostic trouble codes (Service $01)
• Clear diagnostic trouble codes (Service $03)
• Clear trouble code for freeze frame data (Service $01)
• Clear freeze frame data (Service $02)
• Reset status of system monitoring test (Service $01)
• Clear on board monitoring test results (Service $06 and $07)
Service $06
(ON BOARD TESTS)
This diagnostic service accesses the results of on board diagnostic monitoring tests of
specific components/systems that are not continuously monitored.
Service $07
(ON BOARD TESTS)
This diagnostic service enables the off board test drive to obtain test results for emission-
related powertrain components/systems that are continuously monitored during normal
driving conditions.
Service $08
—
This diagnostic service is not applicable on this vehicle.
Service $09
(CALIBRATION ID)
This diagnostic service enables the off-board test device to request specific vehicle infor-
mation such as Vehicle Identification Number (VIN) and Calibration IDs.
JMBIA1389ZZ
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-123
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
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3.
Turn ignition switch ON.
4.
Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)
5.
Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Manual of
the tool maker.
SEF398S
SEF416S
EC-124
< COMPONENT DIAGNOSIS >
[VQ25DE, VQ35DE]
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
COMPONENT DIAGNOSIS
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Description
INFOID:0000000003856505
The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” of “DATA MONI-
TOR” mode of CONSULT-III during normal operation of the Engine Control System. When the value in “SPEC”
in “DATA MONITOR” mode is NOT within the SP value, the Engine Control System may have one or more
malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not illuminate
the MI.
The SP value will be displayed for the following three items:
• B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board correc-
tion)
• A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)
• MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)
Component Function Check
INFOID:0000000003856506
1.
START
Check that all of the following conditions are satisfied.
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (0.983 - 1.043 bar, 1.003 - 1.064 kg/cm
2
, 14.25 - 15.12 psi)
• Atmospheric temperature: 20 - 30
°
C (68 - 86
°
F)
• Engine coolant temperature: 75 - 95
°
C (167 - 203
°
F)
• Transmission: Warmed-up
- After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE” (CVT
fluid temperature sensor signal) indicates more than 60
°
C (140
°
F).
• Electrical load: Not applied
- Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
• Engine speed: Idle
>> GO TO 2.
2.
PERFORM “SPEC” OF “DATA MONITOR” MODE
With CONSULT-III
NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1.
EC-11, "BASIC INSPECTION : Special Repair Requirement"
2.
Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2” and “MAS A/F SE-B1” in “SPEC” of “DATA
MONITOR” mode with CONSULT-III.
3.
Check that monitor items are within the SP value.
Is the measurement value within the SP value?
YES
>> INSPECTION END
NO
>> Go to
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
EC-125
< COMPONENT DIAGNOSIS >
[VQ25DE, VQ35DE]
C
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E
F
G
H
I
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A
EC
N
P
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Diagnosis Procedure
INFOID:0000000003856507
OVERALL SEQUENCE
JMBIA1468GB
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