heating INFINITI FX35 2005 User Guide

OVERHEATING CAUSE ANALYSIS CO-33
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Revision: 2005 July 2005 FX
OVERHEATING CAUSE ANALYSISPFP:00012
Troubleshooting ChartABS006JF
Symptom Check items
Cooling sys-
tem parts
malfunction Poor heat transfer
Water pump malfunction Worn or loose drive belt
—
Thermostat stuck closed —
Damaged fins Dust contamination or
paper clogging
Physical damage
Clogged radiator cooling
tube Excess foreign material
(rust, dirt, sand, etc.)
Reduced air flow Cooling fan does not oper-
ate
Fan assembly —
High resistance to fan rota-
tion
Damaged fan blades
Damaged radiator shroud — — —
Improper engine coolant
mixture ratio —— —
Poor engine coolant quality — Engine coolant density —
Insufficient engine coolant Engine coolant leaks Cooling hose
Loose clamp
Cracked hose
Water pump Poor sealing
Radiator cap Loose
Poor sealing
Radiator O-ring for damage, deterio-
ration or improper fitting
Cracked radiator tank
Cracked radiator core
Reservoir tank Cracked reservoir tank
Overflowing reservoir tank Exhaust gas leaks into
cooling system Cylinder head deterioration
Cylinder head gasket dete-
rioration

CO-34
[VK45DE]
OVERHEATING CAUSE ANALYSIS
Revision: 2005 July 2005 FX
Except cool-
ing system
parts mal-
function — Overload on engine
Abusive driving
High engine rpm under no
load
Driving in low gear for
extended time
Driving at extremely high
speed
Powertrain system mal-
function
—
Installed improper size
wheels and tires
Dragging brakes
Improper ignition timing
Blocked or restricted air
flow Blocked bumper —
—
Blocked radiator grille
Installed car brassiere
Mud contamination or
paper clogging
Blocked radiator —
Blocked condenser Blocked air flow
Installed large fog lamp
Symptom Check items

CO-54
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THERMOSTAT AND WATER CONTROL VALVE
Revision: 2005 July 2005 FX
7. Disconnect radiator hose (upper) and water hoses from thermostat housing.
8. Disconnect heater hoses from water outlet and heater pipe.
9. Remove thermostat housing, water outlet pipe, water connector, water control valve, water outlet and heater pipe.
CAUTION:
Do not disassemble water control valve.
INSPECTION AFTER REMOVAL

Make sure that valves both in thermostat and water control valve are completely closing at normal tempar-
ature.

Place a thread so that it is caught in the valves of the thermostat
and water control valve. Immerse fully in a container filled with
water. Heat while stirring. (The example in the figure shows ther-
mostat.)

The valve opening temperature is the temperature at which the
valve opens and falls from the thread.

Continue heating. Check the maximum valve lift.
NOTE:
The maximum valve lift standard temperature for water control
valve is the reference value.

After checking the maximum valve lift, lower the water tempera-
ture and check the valve closing temperature.
Standard values:

If the malfunctioning condition, when closing valve at normal temperature, or measured values are out of
the standard, replace thermostat and/or water control valve.
INSTALLATION
Note the following, and install in the reverse order of removal.
CAUTION:
Be careful not to spill engine coolant over engine room. Use rag to absorb engine coolant.
Thermostat and Water Control Valve

Install thermostat and water control valve with the whole circum-
ference of each flange part fit securely inside rubber ring. (The
example in the figure shows thermostat.)
SLC252B
Thermostat Water control valve
Valve opening temperature 80 - 84 °C (176 - 183 °F) 93.5 - 96.5 °C (200 - 206 °F)
Maximum valve lift More than 10 mm/ 95
°C
(0.39 in/ 203 °F) More than 8 mm/ 108
°C
(0.315 in/ 226 °F)
Valve closing temperature 77 °C (171 °F) 90 °C (194 °F)
PBIC0157E

EC-5
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FUNCTION .............................................................
. 426
Description .......................................................... . 426
On Board Diagnosis Logic .................................. . 426
DTC Confirmation Procedure .............................. . 426
Wiring Diagram ................................................... . 427
Diagnostic Procedure .......................................... . 428
Component Inspection ........................................ . 431
Remove and Installation ...................................... . 431
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY ................................................................... . 432
Component Description ....................................... . 432
CONSULT-II Reference Value in Data Monitor Mode . 432
On Board Diagnosis Logic .................................. . 432
DTC Confirmation Procedure .............................. . 432
Wiring Diagram ................................................... . 434
Diagnostic Procedure .......................................... . 435
DTC P1128 THROTTLE CONTROL MOTOR ....... . 437
Component Description ....................................... . 437
On Board Diagnosis Logic .................................. . 437
DTC Confirmation Procedure .............................. . 437
Wiring Diagram ................................................... . 438
Diagnostic Procedure .......................................... . 439
Component Inspection ........................................ . 440
Removal and Installation ..................................... . 441
DTC P1146, P1166 HO2S2 .................................... . 442
Component Description ....................................... . 442
CONSULT-II Reference Value in Data Monitor Mode . 442
On Board Diagnosis Logic .................................. . 442
DTC Confirmation Procedure .............................. . 443
Overall Function Check ....................................... . 443
Wiring Diagram ................................................... . 445
Diagnostic Procedure .......................................... . 448
Component Inspection ........................................ . 450
Removal and Installation ..................................... . 452
DTC P1147, P1167 HO2S2 .................................... . 453
Component Description ....................................... . 453
CONSULT-II Reference Value in Data Monitor Mode . 453
On Board Diagnosis Logic .................................. . 453
DTC Confirmation Procedure .............................. . 454
Overall Function Check ....................................... . 454
Wiring Diagram ................................................... . 456
Diagnostic Procedure .......................................... . 459
Component Inspection ........................................ . 461
Removal and Installation ..................................... . 463
DTC P1148, P1168 CLOSED LOOP CONTROL ... . 464
On Board Diagnosis Logic .................................. . 464
DTC P1211 TCS CONTROL UNIT ........................ . 465
Description .......................................................... . 465
On Board Diagnosis Logic .................................. . 465
DTC Confirmation Procedure .............................. . 465
Diagnostic Procedure .......................................... . 465
DTC P1212 TCS COMMUNICATION LINE ........... . 466
Description .......................................................... . 466
On Board Diagnosis Logic .................................. . 466
DTC Confirmation Procedure .............................. . 466
Diagnostic Procedure .......................................... . 466 DTC P1217 ENGINE OVER TEMPERATURE .......
.467
Description ........................................................... .467
CONSULT-II Reference Value in Data Monitor Mode .469
On Board Diagnosis Logic ................................... .469
Overall Function Check ....................................... .469
Wiring Diagram .................................................... .471
Diagnostic Procedure .......................................... .473
Main 12 Causes of Overheating .......................... .478
Component Inspection ......................................... .478
DTC P1225 TP SENSOR ....................................... .479
Component Description ....................................... .479
On Board Diagnosis Logic ................................... .479
DTC Confirmation Procedure .............................. .479
Diagnostic Procedure .......................................... .480
Removal and Installation ..................................... .480
DTC P1226 TP SENSOR ....................................... .481
Component Description ....................................... .481
On Board Diagnosis Logic ................................... .481
DTC Confirmation Procedure .............................. .481
Diagnostic Procedure .......................................... .482
Removal and Installation ..................................... .482
DTC P1229 SENSOR POWER SUPPLY ............... .483
On Board Diagnosis Logic ................................... .483
DTC Confirmation Procedure .............................. .483
Wiring Diagram .................................................... .484
Diagnostic Procedure .......................................... .485
DTC P1271, P1281 A/F SENSOR 1 ...................... .488
Component Description ....................................... .488
CONSULT-II Reference Value in Data Monitor Mode .488
On Board Diagnosis Logic ................................... .488
DTC Confirmation Procedure .............................. .488
Wiring Diagram .................................................... .490
Diagnostic Procedure .......................................... .493
Removal and Installation ..................................... .496
DTC P1272, P1282 A/F SENSOR 1 ...................... .497
Component Description ....................................... .497
CONSULT-II Reference Value in Data Monitor Mode .497
On Board Diagnosis Logic ................................... .497
DTC Confirmation Procedure .............................. .497
Wiring Diagram .................................................... .499
Diagnostic Procedure .......................................... .502
Removal and Installation ..................................... .505
DTC P1273, P1283 A/F SENSOR 1 ...................... .506
Component Description ....................................... .506
CONSULT-II Reference Value in Data Monitor Mode .506
On Board Diagnosis Logic ................................... .506
DTC Confirmation Procedure .............................. .506
Wiring Diagram .................................................... .508
Diagnostic Procedure .......................................... .511
Removal and Installation ..................................... .515
DTC P1274, P1284 A/F SENSOR 1 ...................... .516
Component Description ....................................... .516
CONSULT-II Reference Value in Data Monitor Mode .516
On Board Diagnosis Logic ................................... .516

EC-12Revision: 2005 July 2005 FX
Component Inspection .........................................
11 5 5
Removal and Installation ..................................... 11 5 5
DTC P1124, P1126 THROTTLE CONTROL MOTOR
RELAY .................................................................... 115 6
Component Description ....................................... 11 5 6
CONSULT-II Reference Value in Data Monitor Mode 11 5 6
On Board Diagnosis Logic ................................... 11 5 6
DTC Confirmation Procedure .............................. 11 5 6
Wiring Diagram .................................................... 11 5 8
Diagnostic Procedure .......................................... 11 5 9
DTC P1128 THROTTLE CONTROL MOTOR ........ 116 1
Component Description ....................................... 11 6 1
On Board Diagnosis Logic ................................... 11 6 1
DTC Confirmation Procedure .............................. 11 6 1
Wiring Diagram .................................................... 11 6 2
Diagnostic Procedure .......................................... 11 6 3
Component Inspection ......................................... 11 6 4
Removal and Installation ..................................... 11 6 5
DTC P1140, P1145 IVT CONTROL POSITION SEN-
SOR ........................................................................ 116 6
Component Description ....................................... 11 6 6
CONSULT-II Reference Value in Data Monitor Mode 11 6 6
On Board Diagnosis Logic ................................... 11 6 6
DTC Confirmation Procedure .............................. 11 6 6
Wiring Diagram .................................................... 11 6 7
Diagnostic Procedure .......................................... 11 7 0
Component Inspection ......................................... 11 7 3
Removal and Installation ..................................... 11 7 3
DTC P1143, P1163 HO2S1 .................................... 117 4
Component Description ....................................... 11 7 4
CONSULT-II Reference Value in Data Monitor Mode 11 7 4
On Board Diagnosis Logic ................................... 11 7 4
DTC Confirmation Procedure .............................. 11 7 5
Overall Function Check ....................................... 11 7 6
Diagnostic Procedure .......................................... 11 7 6
Component Inspection ......................................... 11 7 8
Removal and Installation ..................................... 11 7 9
DTC P1144, P1164 HO2S1 .................................... 118 0
Component Description ....................................... 11 8 0
CONSULT-II Reference Value in Data Monitor Mode 11 8 0
On Board Diagnosis Logic ................................... 11 8 0
DTC Confirmation Procedure .............................. 11 8 1
Overall Function Check ....................................... 11 8 2
Diagnostic Procedure .......................................... 11 8 2
Component Inspection ......................................... 11 8 4
Removal and Installation ..................................... 11 8 6
DTC P1146, P1166 HO2S2 .................................... 118 7
Component Description ....................................... 11 8 7
CONSULT-II Reference Value in Data Monitor Mode 11 8 7
On Board Diagnosis Logic ................................... 11 8 7
DTC Confirmation Procedure .............................. 11 8 8
Overall Function Check ....................................... 11 8 8
Wiring Diagram .................................................... 11 9 0
Diagnostic Procedure .......................................... 11 9 3 Component Inspection .........................................
11 9 6
Removal and Installation ...................................... 11 9 7
DTC P1147, P1167 HO2S2 .................................... 11 98
Component Description ....................................... 11 9 8
CONSULT-II Reference Value in Data Monitor Mode 11 9 8
On Board Diagnosis Logic ................................... 11 9 8
DTC Confirmation Procedure ............................... 11 9 9
Overall Function Check ........................................ 11 9 9
Wiring Diagram .................................................... 1201
Diagnostic Procedure ........................................... 1204
Component Inspection ......................................... 1207
Removal and Installation ...................................... 1208
DTC P1148, P1168 CLOSED LOOP CONTROL ... 1209
On Board Diagnosis Logic ................................... 1209
DTC Confirmation Procedure (Up To Serial 400595
Except for Serial 400590) .................................... 1209
DTC Confirmation Procedure (For Serial 400590
and From Serial 400596) ..................................... 1210
Overall Function Check (Up To Serial 400595
Except for Serial 400590) .................................... 1210
Diagnostic Procedure ........................................... 1210
DTC P1211 TCS CONTROL UNIT ......................... 1211
Description ........................................................... 1211
On Board Diagnosis Logic ................................... 1211
DTC Confirmation Procedure ............................... 1211
Diagnostic Procedure ........................................... 1211
DTC P1212 TCS COMMUNICATION LINE ............ 1212
Description ........................................................... 1212
On Board Diagnosis Logic ................................... 1212
DTC Confirmation Procedure ............................... 1212
Diagnostic Procedure ........................................... 1212
DTC P1217 ENGINE OVER TEMPERATURE ....... 1213
Description ........................................................... 1213
CONSULT-II Reference Value in Data Monitor Mode 1214
On Board Diagnosis Logic ................................... 1214
Overall Function Check ........................................ 1215
Wiring Diagram .................................................... 1217
Diagnostic Procedure ........................................... 1219
Main 13 Causes of Overheating .......................... 1223
Component Inspection ......................................... 1224
DTC P1225 TP SENSOR ....................................... 1225
Component Description ....................................... 1225
On Board Diagnosis Logic ................................... 1225
DTC Confirmation Procedure ............................... 1225
Diagnostic Procedure ........................................... 1226
Removal and Installation ...................................... 1226
DTC P1226 TP SENSOR ....................................... 1227
Component Description ....................................... 1227
On Board Diagnosis Logic ................................... 1227
DTC Confirmation Procedure ............................... 1227
Diagnostic Procedure ........................................... 1228
Removal and Installation ...................................... 1228
DTC P1229 SENSOR POWER SUPPLY ............... 1229
On Board Diagnosis Logic ................................... 1229
DTC Confirmation Procedure ............................... 1229
Wiring Diagram .................................................... 1230
Diagnostic Procedure ........................................... 1231

EC-272
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DTC P0181 FTT SENSOR
Revision: 2005 July 2005 FX
2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 4 and 5 by heating with hot water or heat gun as
shown in the figure.
Removal and InstallationABS006PC
FUEL TANK TEMPERATURE SENSOR
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Temperature °C ( °F) Resistance k Ω
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90
PBIB0931E

DTC P0182, P0183 FTT SENSOR EC-277
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2. Check resistance between “fuel level sensor unit and fuel pump”
terminals 4 and 5 by heating with hot water or heat gun as
shown in the figure.
Removal and InstallationABS006PJ
FUEL TANK TEMPERATURE SENSOR
Refer to FL-4, "FUEL LEVEL SENSOR UNIT, FUEL FILTER AND FUEL PUMP ASSEMBLY" .
Temperature °C ( °F) Resistance k Ω
20 (68) 2.3 - 2.7
50 (122) 0.79 - 0.90
PBIB0931E

DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS- FIRE
EC-285
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DTC P0300 - P0306 MULTIPLE CYLINDER MISFIRE, NO. 1 - 6 CYLINDER MIS-
FIRE
PFP:00000
On Board Diagnosis LogicABS006PS
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor (POS) signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage) On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level that will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration) For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. During this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected on any one cylinder or on multiple cylinders.
DTC Confirmation ProcedureABS0095P
CAUTION:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws when driv-
ing.
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
Sensor Input Signal to ECM ECM function
Crankshaft position sensor (POS) Engine speed On board diagnosis of misfire
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0300
0300 Multiple cylinder misfire
detected Multiple cylinder misfire.

Improper spark plug

Insufficient compression

Incorrect fuel pressure

The injector circuit is open or shorted

Fuel injector

Intake air leak

The ignition signal circuit is open or
shorted

Lack of fuel

Signal plate

Air fuel ratio (A/F) sensor 1

Incorrect PCV hose connection
P0301
0301 No.1 cylinder misfire
detected No. 1 cylinder misfires.
P0302
0302 No. 2 cylinder misfire
detected No. 2 cylinder misfires.
P0303
0303 No. 3 cylinder misfire
detected No. 3 cylinder misfires.
P0304
0304 No. 4 cylinder misfire
detected No. 4 cylinder misfires.
P0305
0305 No. 5 cylinder misfire
detected No. 5 cylinder misfires.
P0306
0306 No. 6 cylinder misfire
detected No. 6 cylinder misfires.

DTC P1217 ENGINE OVER TEMPERATURE EC-469
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CONSULT-II Reference Value in Data Monitor ModeABS006V9
Specification data are reference values.
On Board Diagnosis LogicABS006VA
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
This self-diagnosis has the one trip detection logic.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to CO-11, "
Changing Engine
Coolant" . Also, replace the engine oil. Refer to LU-9, "Changing Engine Oil" .
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to use coolant with the proper mixture ratio. Refer to MA-13, "
Anti-Freeze Coolant Mixture Ratio" .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function CheckABS006VB
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
MONITOR ITEM CONDITION SPECIFICATION
AIR COND SIG

Engine: After warming up, idle
the engine Air conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.) 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 99 °C
(210 °F) LOW
Engine coolant temperature is
between 100 °C (212 °F) and 104 °C
(219 °F) MID
Engine coolant temperature is 105 °C
(221 °F) or more HI
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217 Engine over tempera-
ture (Overheat)

Cooling fan does not operate properly (Over-
heat).

Cooling fan system does not operate prop-
erly (Overheat).

Engine coolant level was not added to the
system using the proper filling method.

Engine coolant is not within the specified
range.

Harness or connectors
(The cooling fan circuit is open or
shorted.)

IPDM E/R

Cooling fan

Radiator hose

Radiator

Radiator cap

Water pump

Thermostat
For more information, refer to EC-478,
"Main 12 Causes of Overheating" .

EC-474
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2005 July 2005 FX
5. CHECK RADIATOR CAP
Apply pressure to cap with a tester.
OK or NG
OK >> GO TO 6.
NG >> Replace radiator cap.
6. CHECK THERMOSTAT
1. Check valve seating condition at normal room temperatures. It should seat tightly.
2. Check valve opening temperature and valve lift.
3. Check if valve is closed at 5 °C (9 °F) below valve opening tem-
perature.
For details, refer to CO-26, "
WATER INLET AND THERMO-
STAT ASSEMBLY" .
OK or NG
OK >> GO TO 7.
NG >> Replace thermostat
7. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-212, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace engine coolant temperature sensor.
8. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-478, "
Main 12 Causes of Overheating" .
>> INSPECTION END
Radiator cap relief pressure:
59 - 98 kPa (0.6 - 1.0 kg/cm
2
, 9 - 14 psi)
SLC755A
Valve opening temperature: 76.5 °C (170 °F) [standard]
Valve lift: More than 8.6 mm/90 °C
(0.339 in/194 °F)
SLC343