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Infiniti G35 (V35) Sedan. Manual - part 494

EC-122

< FUNCTION DIAGNOSIS >

[VQ35HR]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

*: Leaving cooling fan OFF with CONSULT-III while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE

SRT STATUS Mode

For details, refer to

EC-101, "Diagnosis Description"

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

DTC WORK SUPPORT Mode

*: DTC P1442 and P1456 does not apply to V36 models but appears in DTC Work Support Mode screens.

Diagnosis Tool Function

INFOID:0000000000956517

DESCRIPTION

INT V/T ANGLE

• Engine: Return to the original

trouble condition

• Change intake valve timing using

CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Intake valve timing control sole-

noid valve

EXT V/T ANGLE

• Engine: Return to the original

trouble condition

• Change exhaust valve timing us-

ing CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Exhaust valve timing control mag-

net retarder

FAN DUTY CON-
TROL*

• Ignition switch: ON
• Change duty ratio using CON-

SULT-III.

Cooling fan speed changes.

• Harness and connectors
• Cooling fan motor
• Cooling fan relay
• Cooling fan control module
• IPDM E/R

ALTERNATOR
DUTY

• Engine: Idle
• Change duty ratio using CON-

SULT-III.

Battery voltage changes.

• Harness and connectors
• IPDM E/R
• Alternator

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE SYSTEM

EVP SML LEAK P0442/P1442*

P0442

EC-274

P0455

EC-310

EVP V/S LEAK P0456/P1456*

P0456

EC-316

PURG VOL CN/V P1444

P0443

EC-280

PURG FLOW P0441

P0441

EC-269

A/F SEN1

A/F SEN1 (B1) P1278/P1279

P0133

EC-197

A/F SEN1 (B1) P1276

P0130

EC-187

A/F SEN1 (B2) P1288/P1289

P0153

EC-197

A/F SEN1 (B2) P1286

P0150

EC-187

HO2S2

HO2S2 (B1) P1146

P0138

EC-208

HO2S2 (B1) P1147

P0137

EC-202

HO2S2 (B1) P0139

P0139

EC-216

HO2S2 (B2) P1166

P0158

EC-208

HO2S2 (B2) P1167

P0157

EC-202

HO2S2 (B2) P0159

P0159

EC-216

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-123

< FUNCTION DIAGNOSIS >

[VQ35HR]

Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has
8 different functions explained below.
ISO9141 is used as the protocol.
The name “GST” or “Generic Scan Tool” is used in this service man-
ual.

FUNCTION

INSPECTION PROCEDURE

Turn ignition switch OFF.

Connect “GST” to data link connector (1), which is located under
LH dash panel near the hood opener handle.

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

EC-521, "DTC Index"

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 can close EVAP system in ignition switch ON position (Engine
stopped). When this diagnostic service is performed, EVAP canister vent control valve can
be closed.
In the following conditions, this diagnostic service cannot function.
• Low ambient temperature
• Low battery voltage
• Engine running
• Ignition switch OFF
• Low fuel temperature
• Too much pressure is applied to EVAP system

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.

JMBIA0055ZZ

EC-124

< FUNCTION DIAGNOSIS >

[VQ35HR]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

Turn ignition switch ON.

Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)

Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Manual of
the tool maker.

SEF398S

SEF416S

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-125

< COMPONENT DIAGNOSIS >

[VQ35HR]

COMPONENT DIAGNOSIS

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Description

INFOID:0000000000956518

The specification (SP) value indicates the tolerance of the value that is displayed in “SPEC” in “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 within the SP value, the Engine Control System is confirmed OK. 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 light the
MIL.
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/B2 (The signal voltage of the mass air flow sensor)

Component Function Check

INFOID:0000000000956519

PRECONDITIONING

Make sure that all of the following conditions are satisfied.
TESTING CONDITION
• Vehicle driven distance: More than 5,000 km (3,107 miles)
• Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

, 14.25 - 15.12 psi)

• Atmospheric temperature: 20 - 30

C (68 - 86

• Engine coolant temperature: 75 - 95

C (167 - 203

• Transmission: Warmed-up
- For A/T models: After the engine is warmed up to normal operating temperature, drive vehicle until “ATF

TEMP SE 1” (A/T fluid temperature sensor signal) indicates more than 60

C (140

F).

- For M/T models: After the engine is warmed up to normal operating temperature, drive for 5 minutes.
• 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.

PERFORM SPEC IN DATA MONITOR MODE

With CONSULT-III

NOTE:
Perform “SPEC” in “DATA MONITOR” mode in maximum scale display.
1.

Perform

EC-12, "BASIC INSPECTION : Special Repair Requirement"

Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”, “MAS A/F SE-B1” and “MAS A/F SE-B2” in
“SPEC” of “DATA MONITOR” mode with CONSULT-III.

Make sure that monitor items are within the SP value.

Is the measurement value within the SP value?

YES

>> INSPECTION END

>> Go to

EC-125, "Diagnosis Procedure"

Diagnosis Procedure

INFOID:0000000000956520

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