service INFINITI FX35 2008 Service Manual

DTC P1217 ENGINE OVER TEMPERATUREEC-1035
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Diagnosis ProcedureINFOID:0000000001326901
1.CHECK COOLING FAN (CRANKSHAFT DRIVEN)
1. Start engine and let id idle.
2. Make sure that cooling fan (crankshaft driven) operates normally.
OK or NG
OK (With CONSULT-III)>>GO TO 2.
TBWM0255E
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EC-1036
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
OK (Without CONSULT-III)>>GO TO 4.
NG >> Check cooling fan (crankshaft driven). Refer to CO-48
.
2.CHECK COOLING FAN MIDDLE SPEED OPERATION
With CONSULT-III
1. Start engine and let it idle.
2. Select “COOLING FAN” in “ACTIVE TEST” mode wit h CONSULT-III, and touch “MID” on the CONSULT-III
screen.
3. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 3.
NG >> Check cooling fan middle speed cont rol circuit. (Go to "PROCEDURE A".)
3.CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-III
1. Select “COOLING FAN” in “A CTIVE TEST” mode with CONSULT-III and touch “HI” on the CONSULT-III
screen.
2. Make sure that cooling fan operates at higher speed than middle speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan high speed control circuit. (Go to "PROCEDURE B".)
4.CHECK COOLING FAN MIDDLE SPEED OPERATION
Without CONSULT-III
1. Disconnect engine coolant temperature sensor harness connector.
2. Connect 200 Ω resistor to engine coolant tem perature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 5.
NG >> Check cooling fan middle speed control circuit. (Go to "PROCEDURE A".)
5.CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-III
1. Disconnect 200 Ω resister to the engine coolant te mperature sensor harness connector.
2. Connect 150 Ω resistor to engine coolant tem perature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates at higher speed than middle speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan control circuit. (Go to "PROCEDURE B".)
6.CHECK COOLING SYSTEM FOR LEAK
PBIB0965E
SEF882V
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DTC P1217 ENGINE OVER TEMPERATUREEC-1037
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Apply pressure to the cooling sys
tem with a tester, and check if the
pressure drops.
CAUTION:
Higher than the specified pressu re may cause radiator damage.
Pressure should not drop.
OK or NG
OK >> GO TO 7.
NG >> Check the following for leak. Refer to CO-37, "
Inspec-
tion".
Hose
 Radiator
 Water pump
7.CHECK RADIATOR CAP
Apply pressure to cap with a tester.
OK or NG
OK >> GO TO 8.
NG >> Replace radiator cap.
8.CHECK COMPONENT PARTS
Check the following.
 Thermostat. (Refer to CO-52
.)
 Water control valve. (Refer to CO-52
.)
 Engine coolant temperature sensor. (Refer to EC-783, "
Component Inspection".)
OK or NG
OK >> GO TO 9.
NG >> Replace malfunctioning component.
9.CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to EC-1039, "
Main 13 Causes of Overheating".
>> INSPECTION END
PROCEDURE A
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E6.
3. Check voltage between IPDM E/R terminal 16 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2. Testing pressure: 157 kPa (1.6 kg/cm
2, 23 psi)
PBIC1528E
Radiator cap
relief pressure:
59 - 98 kPa (0.6 - 1.0 kg/cm2, 9 - 14 psi)
SLC755A
Voltage: Battery voltage
PBIB0966E
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EC-1038
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
2.DETECT MALFUNCTIONING PART
Check the following.
 40A fusible link
 Harness for open or short between IPDM E/R and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN OR SHORT
1. Disconnect IPDM E/R harness connector E5.
2. Disconnect cooling fan motor harness connector.
3. Check harness continuity between cooling fan motor terminal 2 and IPDM E/R terminal 8.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK COOLING FAN MOTOR GROUND CIRCUIT FOR OPEN OR SHORT
1. Check harness continuity between the following; cooling fan motor terminal 3 and ground,
cooling fan motor terminal 4 and ground,
IPDM E/R terminal 38 and ground,
IPDM E/R terminal 60 and ground.
Refer to wiring diagram.
2. Also check harness for short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to power in harness or connectors.
5.CHECK COOLING FAN MOTOR
Refer to EC-1040, "
Component Inspection".
OK or NG
OK >> GO TO 6.
NG >> Replace cooling fan motor.
6.CHECK INTERMITTENT INCIDENT
Perform EC-717
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17.
NG >> Repair or replace harness connectors.
PROCEDURE B
1.CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN OR SHORT
1. Disconnect IPDM E/R harness connector E6. Continuity should exist.
PBIB1493E
Continuity should exist.
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DTC P1217 ENGINE OVER TEMPERATUREEC-1039
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2. Disconnect cooling fan motor harness connector.
3. Check harness continuity between cooling fan motor terminal 1
and IPDM E/R terminal 11.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
2.CHECK COOLING FAN MOTOR
Refer to EC-1040, "
Component Inspection".
OK or NG
OK >> GO TO 3.
NG >> Replace cooling fan motor.
3.CHECK INTERMITTENT INCIDENT
Perform EC-717
.
OK or NG
OK >> Replace IPDM E/R. Refer to PG-17.
NG >> Repair or replace harness connectors.
Main 13 Causes of OverheatingINFOID:0000000001326902
Continuity should exist.
PBIB1493E
Engine Step Inspection item Equipment Standard Reference page
OFF 1  Blocked radiator  Blocked condenser
 Blocked radiator grille
 Blocked bumper  Visual No blocking —
2  Coolant mixture  Coolant tester 50 - 50% coolant mixture MA-10
3  Coolant level  Visual Coolant up to MAX level in
reservoir tank and radiator
filler neckCO-37
4  Radiator cap  Pressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm2, 9 - 14
psi) (Limit) CO-42
ON*25  Coolant leaks  Visual No leaks
CO-37
ON*26  Thermostat  Touch the upper and
lower radiator hosesBoth hoses should be hot
CO-52
ON*17  Cooling fan  CONSULT-III Operating See trouble diagnosis for
DTC P1217 (EC-1030
).
OFF 8  Combustion gas leak  Color checker chemical tester 4 Gas analyzerNegative —
ON*
39  Coolant temperature gauge  Visual Gauge less than 3/4 when
driving —
 Coolant overflow to res- ervoir tank  Visual No overflow during driving
and idling CO-37
OFF*410  Coolant return from res-
ervoir tank to radiator  Visual Should be initial level in
reservoir tank CO-37
OFF 11  Water control valve  Remove and inspect
the valveWithin the specified value
CO-52
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EC-1040
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to CO-34
.
Component InspectionINFOID:0000000001326903
COOLING FAN MOTOR
1. Disconnect cooling fan motor harness connector.
2. Supply cooling fan motor terminals with battery voltage and
check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.
OFF 12  Cylinder head  Straight gauge feeler gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping) EM-226
13  Cylinder block and pis-
tons  Visual No scuffing on cylinder
walls or piston EM-241
Engine Step Inspection item Equipment Standard Reference page
Sp ee d
Te r m i n a l s
(+) ( −)
Cooling fan motor Middle 1 3 and 4
2 3 and 4
High 1, 2 3, 4
SEF321T
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DTC P1225 TP SENSOREC-1041
< SERVICE INFORMATION > [VK45DE]
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DTC P1225 TP SENSOR
Component DescriptionINFOID:0000000001326904
Electric throttle control actuator
consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has t he two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect t he opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
On Board Diagnosis LogicINFOID:0000000001326905
The MIL will not light up for this diagnosis.
DTC Confirmation ProcedureINFOID:0000000001326906
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
1. Turn ignition switch ON.
2. Turn ignition switch OFF, wait at least 10 seconds.
3. Turn ignition switch ON.
4. Check 1st trip DTC.
5. If 1st trip DTC is detected, go to EC-1041, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326907
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is c aught between the throttle valve (1)
and the housing.
- Illustration shows the view with intake air duct removed.
OK or NG
OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-663, "
Throttle Valve Closed Position Learning".
3. Perform EC-663, "
Idle Air Volume Learning".
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1225
1225 Closed throttle position
learning performance Closed throttle position learning value is exces-
sively low.  Electric throttle control actuator
(TP sensor 1 and 2)
PBIB3247E
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EC-1042
< SERVICE INFORMATION >[VK45DE]
DTC P1225 TP SENSOR
>>
INSPECTION END
Removal and InstallationINFOID:0000000001326908
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-175.
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DTC P1226 TP SENSOREC-1043
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DTC P1226 TP SENSOR
Component DescriptionINFOID:0000000001326909
Electric throttle control actuator
consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has t he two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect t he opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.
On Board Diagnosis LogicINFOID:0000000001326910
The MIL will not light up for this diagnosis.
DTC Confirmation ProcedureINFOID:0000000001326911
NOTE:
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
1. Turn ignition switch ON.
2. Turn ignition switch OFF, wait at least 10 seconds.
3. Turn ignition switch ON.
4. Repeat steps 2 and34 for 32 times.
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to EC-1043, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326912
1.CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Turn ignition switch OFF.
2. Remove the intake air duct.
3. Check if foreign matter is c aught between the throttle valve (1)
and the housing.
- Illustration shows the view with intake air duct removed.
OK or NG
OK >> GO TO 2.
NG >> Remove the foreign matter and clean the electric throttle control actuator inside.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
PBIB0145E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1226
1226 Closed throttle position
learning performance Closed throttle position learning is not per-
formed successfully, repeatedly.  Electric throttle control actuator
(TP sensor 1 and 2)
PBIB3247E
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3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1044
< SERVICE INFORMATION >[VK45DE]
DTC P1226 TP SENSOR
2. Perform
EC-663, "Throttle Valve Closed Position Learning".
3. Perform EC-663, "
Idle Air Volume Learning".
>> INSPECTION END
Removal and InstallationINFOID:0000000001326913
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-175.
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