Infiniti Q45 (FY33). Manual — part 136
EXPLANATION FOR DRIVING PATTERNS EXCEPT FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”
<Driving pattern A>
AEC574
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The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
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The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
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The DTC will not be displayed after the A counter reaches 40.
<Driving pattern B>
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
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The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
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The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
I
The MIL will go off when the B counter reaches 3 (*2 in “OBD SYSTEM OPERATION CHART”).
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
OBD System Operation Chart (Cont’d)
EC-73
SEF046TA
CONSULT-II
CONSULT-II INSPECTION PROCEDURE
1.
Turn off ignition switch.
2.
Connect “CONSULT-II” to data link connector which is located
beside the hood lock release handle.
PBR455D
3.
Turn on ignition switch.
4.
Touch “START”.
PEF895K
5.
Touch “ENGINE”.
SEF824Y
6.
Perform each diagnostic test mode according to each service
procedure.
For further information, see the CONSULT-II Operation
Manual.
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
EC-74
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
Item
DIAGNOSTIC TEST MODE
WORK
SUP-
PORT
SELF-DIAGNOSTIC
RESULTS*1
DATA
MONITOR
ACTIVE
TEST
DTC & SRT
CONFIRMATION
FREEZE
FRAME
DATA*2
SRT STA-
TUS
DTC
WORK
SUPPORT
ENGINE
CONTROL
COMPONENT
P
ARTS
INPUT
Camshaft position sensor
X
X
X
Mass air flow sensor
X
X
Engine coolant temperature sensor
X
X
X
X
Heated oxygen sensor 1 (front)
X
X
X
X
Heated oxygen sensor 2 (rear)
X
X
X
X
Vehicle speed sensor
X
X
X
Throttle position sensor
X
X
X
Fuel tank temperature sensor
X
X
X
EVAP control system pressure sensor
X
X
Absolute pressure sensor
X
X
EGR temperature sensor
X
X
Intake air temperature sensor
X
X
Crankshaft position sensor (OBD)
X
Knock sensor
X
Ignition switch (start signal)
X
Closed throttle position switch
X
Closed throttle position switch (throttle
position sensor signal)
X
Air conditioner switch
X
Park/Neutral position switch
X
X
Power steering oil pressure switch
X
Air conditioner switch
X
Battery voltage
X
Ambient air temperature switch
X
OUTPUT
Injectors
X
X
Power transistor (Ignition timing)
X
(Ignition
signal)
X
X
IACV-AAC valve
X
X
X
X
EVAP canister purge volume control valve
X
X
X
X
Air conditioner relay
X
Fuel pump relay
X
X
X
EGRC-solenoid valve
X
X
X
Heated oxygen sensor 1 heater (front)
X
X
X
Heated oxygen sensor 2 heater (rear)
X
X
X
EVAP canister purge control solenoid valve
X
X
X
EVAP canister vent control valve
X
X
X
Vacuum cut valve bypass valve
X
X
X
X
MAP/BARO switch solenoid valve
X
X
X
Calculated load value
X
X
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame
data mode only if a 1st trip DTC or DTC is detected. For details, refer to EC-51.
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont’d)
EC-75
FUNCTION
Diagnostic test mode
Function
Work support
This mode enables a technician to adjust some
devices faster and more accurately by following the
indications on the CONSULT-II unit.
Self-diagnostic results
Self-diagnostic results such as 1st trip DTC, DTCs
and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*1
Data monitor
Input/Output data in the ECM can be read.
Active test
Diagnostic Test Mode in which CONSULT-II drives
some actuators apart from the ECMs and also shifts
some parameters in a specified range.
DTC & SRT confirmation
The status of system monitoring tests and the self-
diagnosis status/result can be confirmed.
ECM part numbers
ECM part numbers can be read.
*1 The following emission-related diagnostic information is cleared when the ECM memory is erased.
1. Diagnostic trouble codes
2. 1st trip diagnostic trouble codes
3. Freeze frame data
4. 1st trip freeze frame data
5. System readiness test (SRT) codes
6. Test values
7. Others
WORK SUPPORT MODE
WORK ITEM
CONDITION
USAGE
TP SW/TP SEN IDLE POSI ADJ
I
FOLLOW THE BASIC INSPECTION IN THE SERVICE
MANUAL.
When adjusting the idle throttle posi-
tion.
IACV-AAC/V ADJ
SET ENGINE SPEED AT THE SPECIFIED VALUE UNDER THE
FOLLOWING CONDITIONS.
I
ENGINE WARMED UP
I
NO-LOAD
When adjusting ignition timing and idle
speed
FUEL PRESSURE RELEASE
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FUEL PUMP WILL STOP BY TOUCHING “START” DURING
IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.
When releasing fuel pressure from
fuel line
SELF-LEARNING CONT
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THE COEFFICIENT OF SELF-LEARNING CONTROL MIXTURE
RATIO RETURNS TO THE ORIGINAL COEFFICIENT.
When releasing fuel pressure from
fuel line
EVAP SYSTEM CLOSE
OPEN THE VACUUM CUT VALVE BYPASS VALVE AND CLOSE
THE EVAP CANISTER VENT CONTROL VALVE IN ORDER TO
MAKE THE EVAP SYSTEM CLOSE UNDER THE FOLLOWING
CONDITIONS.
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IGN SW “ON”
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ENGINE NOT RUNNING
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AMBIENT TEMPERATURE IS ABOVE 0°C (32°F).
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NO VACUUM AND NO HIGH PRESSURE IN EVAP SYSTEM
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FUEL TANK TEMP. IS MORE THAN 0°C (32°F).
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WITHIN 10 MINUTES AFTER STARTING “EVAP SYSTEM
CLOSE”
I
WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-II WILL
DISCONTINUE IT AND DISPLAY APPROPRIATE INSTRUC-
TION.
NOTE:
WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY “BAT-
TERY VOLTAGE IS LOW. CHARGE BATTERY”, EVEN IN
USING CHARGED BATTERY.
When detecting EVAP vapor leak
point of EVAP system
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
CONSULT-II (Cont’d)
EC-76
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