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TROUBLE DIAGNOSIS
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VENT CONT/VIgnition switch: ON OFF
THRTL RELAY
Ignition switch: ON ON
COOLING FAN
Engine: After warming up, idle
the engine
Air co INFINITI FX35 2005 Service Manual EC-840
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TROUBLE DIAGNOSIS
Revision: 2005 July 2005 FX
VENT CONT/VIgnition switch: ON OFF
THRTL RELAY
Ignition switch: ON ON
COOLING FAN
Engine: After warming up, idle
the engine
Air co](/manual-img/42/57020/w960_57020-2232.png)
EC-840
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TROUBLE DIAGNOSIS
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VENT CONT/VIgnition switch: ON OFF
THRTL RELAY
Ignition switch: ON ON
COOLING FAN
Engine: After warming up, idle
the engine
Air conditioner switch: OFF Engine coolant temperature is 94
°C
(201 °F) or less OFF
Engine coolant temperature is between
95 °C (203 °F) and 104 °C (219 °F) MID
Engine coolant temperature is 105 °C
(221 °F) or more HI
HO2S1 HTR (B1)
HO2S1 HTR (B2)
Engine: After warming up
Engine speed: Below 3,000 rpm ON
Engine speed: Above 3,000 rpm OFF
HO2S2 HTR (B1)
HO2S2 HTR (B2)
Engine speed: Below 3,600 rpm after the following conditions are met.
–Engine: After warming up
–Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load ON
Engine speed: Above 3,600 rpm OFF
I/P PULLY SPD
Vehicle speed: More than 20 km/h (12 MPH) Almost the same speed as
the tachometer indication
VEHICLE SPEED
Turn drive wheels and compare CONSULT-II value with the speedometer
indication. Almost the same speed as
the speedometer indication
TRVL AFTER MIL
Ignition switch: ON Vehicle has traveled after MIL has turned
ON. 0 - 65,535 km
(0 - 40,723 miles)
SNOW MODE SW
Ignition switch: ON Snow mode switch: ON ON
Snow mode switch: OFF OFF
O2SEN HTR DTY
Engine coolant temperature when engine started: More than 80 °C (176 °F)
Engine speed: Below 3,000 rpm Approx. 50%
AC PRESS SEN
Ignition switch: ON (Engine stopped) Approx. 0V
Engine: Idle
Air conditioner switch: OFF 1.0 - 4.0V
VHCL SPEED SE
Turn drive wheels and compare CONSULT-II value with the speedometer
indication. Almost the same speed as
the speedometer indication
SET VHCL SPD
Engine: Running ASCD: Operating The preset vehicle speed is
displayed
MAIN SW
Ignition switch: ON MAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW
Ignition switch: ON CANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW
Ignition switch: ON RESUME/ACCELERATE switch:
Pressed ON
RESUME/ACCELERATE switch:
Released OFF
SET SW
Ignition switch: ON SET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
BRAKE SW1
(ICC/ASCD brake
switch)
Ignition switch: ON Brake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW2
(Stop lamp switch)
Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
MONITOR ITEM CONDITION SPECIFICATION
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*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal. DIST SW
Ignition switch: ON
DISTANCE switch: Pressed ON
DISTANCE switch: Released OFF
CRUISE LAMP
Ignition switch: ON MAIN switch: Pressed at the 1st time
→
at the 2nd time ON
→ OFF
SET LAMP
MAIN switch: ON
When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH) ASCD is operating ON
ASCD is not operating OFF
MONITOR ITEM CONDITION SPECIFICATION
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EC-842
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Major Sensor Reference Graph in Data Monitor ModeABS007IA
The following are the major sensor reference graphs in “DATA MONITOR” mode.
CLSD THL POS, ACCEL SEN 1, THRTL SEN 1
Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch ON and with selector lever in D position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from “ON” to “OFF”.
ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), HO2S1 (B1), INJ PULSE-B1
Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)”, “HO2S1 (B1)” and
“INJ PULSE-B1” when revving engine quickly up to 4,800 rpm under no load after warming up engine suffi-
ciently.
Each value is for reference, the exact value may vary.
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![INFINITI FX35 2005 Service Manual EC-844
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
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TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionABS00E4K
The specification (SP) value indicates the tole INFINITI FX35 2005 Service Manual EC-844
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
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TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionABS00E4K
The specification (SP) value indicates the tole](/manual-img/42/57020/w960_57020-2236.png)
EC-844
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TROUBLE DIAGNOSIS - SPECIFICATION VALUE
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TROUBLE DIAGNOSIS - SPECIFICATION VALUEPFP:00031
DescriptionABS00E4K
The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” 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 cor-
rection)
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)
Testing ConditionABS00E4L
Vehicle driven distance: More than 5,000 km (3,017 miles)
Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm2 , 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*1
Electrical load: Not applied*2
Engine speed: Idle
*1: After the engine is warmed up to normal operating temperature, drive vehicle until “ATF TEMP 1” (A/T fluid
temperature sensor signal) indicates more than 60 °C (140 °F).
*2: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
Inspection ProcedureABS00E4M
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1. Perform EC-769, "
Basic Inspection" .
2. Confirm that the testing conditions indicated above are met.
3. Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2” and “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with
CONSULT-II.
4. Make sure that monitor items are within the SP value.
5. If NG, go to EC-845, "
Diagnostic Procedure" .
SEF601Z
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Diagnostic ProcedureABS00E4N
OVERALL SEQUENCE
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EC-846
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DETAILED PROCEDURE
1. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start INFINITI FX35 2005 Service Manual TROUBLE DIAGNOSIS - SPECIFICATION VALUE EC-847
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DETAILED PROCEDURE
1. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start](/manual-img/42/57020/w960_57020-2239.png)
TROUBLE DIAGNOSIS - SPECIFICATION VALUE EC-847
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DETAILED PROCEDURE
1. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Start engine.
2. Confirm that the testing conditions are met. Refer to EC-844, "
Testing Condition" .
3. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR (SPEC)” mode, and make sure that the each indication is within
the SP value.
NOTE:
Check “A/F ALPHA-B1”, “A/F ALPHA-B2” for approximately 1
minute because they may fluctuate. It is NG if the indication is
out of the SP value even a little.
OK or NG
OK >> GO TO 17.
NG (Less than the SP value)>>GO TO 2.
NG (More than the SP value)>>GO TO 3.
2. CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK >> GO TO 4.
NG (More than the SP value)>>GO TO 19.
3. CHECK “B/FUEL SCHDL”
Select “B/FUEL SCHDL” in “DATA MONITOR (SPEC)” mode, and
make sure that the indication is within the SP value.
OK or NG
OK >> GO TO 6.
NG (More than the SP value)>>GO TO 6.
NG (Less than the SP value)>>GO TO 25.
4. CHECK “A/F ALPHA-B1”, “A/F ALPHA-B2”
1. Stop the engine.
2. Disconnect PCV hose, and then plug it.
3. Start engine.
4. Select “A/F ALPHA-B1”, “A/F ALPHA-B2” in “DATA MONITOR (SPEC)” mode, and make sure that the each indication is within the SP value.
OK or NG
OK >> GO TO 5.
NG >> GO TO 6.
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