2008 INFINITI FX35 transmission

DTC P1574 ICC VEHICLE SPEED SENSOREC-1075
< SERVICE INFORMATION > [VK45DE]
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DTC P1574 ICC VEHIC
LE SPEED SENSOR
Component DescriptionINFOID:0000000001326949
The ECM receives two vehicle speed signals via CAN comm unication line. One is sent from “unified meter and
A/C amp.”, and the other is from TCM (Transmission control module). The ECM uses these signals for ICC
control. Refer to ACS-7
for ICC functions.
On Board Diagnosis LogicINFOID:0000000001326950
This self-diagnosis has the on e trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
 If DTC P1574 is displayed with DTC U1000, U1001, first perform th e trouble diagnosis for DTC U1000,
U1001. Refer to EC-724
.
 If DTC P1574 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-726
.
 If DTC P1574 is displayed with DT C P0500, first perform the trouble diagnosis for DTC P0500. Refer
to EC-992
.
 If DTC P1574 is displayed with DTC P0605, firs t perform the trouble diagnosis for DTC P0605.
Refer to EC-1007
.
DTC Confirmation ProcedureINFOID:0000000001326951
CAUTION:
Always drive vehicle at a safe speed.
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:
Step 3 may be conducted with the dr ive wheels lifted in the shop or by driving the vehicle. If a road test
is expected to be easier, it is unnecessary to lift the vehicle.
1. Start engine (VDC switch OFF).
2. Drive the vehicle at more than 40 km/h (25MPH).
3. Check DTC.
4. If DTC is detected, go to EC-1075, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326952
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT- 3 8
.
OK or NG
OK >> GO TO 2.
NG >> Perform trouble shooting relevant to DTC indicated.
2.CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Refer to BRC-13
.
OK or NG
DTC No. Trouble diagnosis
name DTC detecting condition Possible cause
P1574
1574 ICC vehicle speed
sensor ECM detects a difference between two vehicle
speed signals is out of the specified range.  Harness or connectors
(The CAN communication line is open or
shorted.)
 Unified meter and A/C amp.
 ABS actuator and electric unit (control unit)
 Wheel sensor
TCM
ECM
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EXHAUST MANIFOLD AND THREE WAY CATALYST
EM-27
< SERVICE INFORMATION > [VQ35DE]
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6. Using the heated oxygen sensor wrench (SST), remove heated
oxygen sensors 2 (bank 1 and bank 2).
CAUTION:
 Be careful not to damage heated oxygen sensor.
 Discard any heated oxyg en sensor which has been
dropped onto a hard surface such as a concrete floor,
replace with a new sensor.
7. Remove exhaust mounting bracket between three way catalysts (right and left bank) and transmission. Refer to EX-3
.
8. Remove three way catalysts (right and left bank).
9. Disconnect air fuel ratio sensor 1 (bank 1 and bank 2) harness connectors and remove harness clip.
10. Using the heated oxygen sensor wrench (SST), remove air fuel ratio sensor 1 (bank 1 and bank 2).
CAUTION:
 Be careful not to damage air fuel ratio sensor.
 Discard any air fuel ratio sen sor which has been dropped
onto a hard surface such as a concrete floor, replace with
a new sensor.
11. Remove water pipe and heater pipe on both right and left side. Refer to CO-29, "
Component".
12. Remove exhaust manifold cover (right and left bank).
13. Loosen mounting nuts in the reverse order as shown in the fig- ure to remove exhaust manifold with power tool.
NOTE:
Disregard the numerical order No. 7 and 8 in removal.
14. Remove gaskets. CAUTION:
Cover engine openings to avoid entry of foreign materials.
INSPECTION AFTER REMOVAL
KBIA1740E
SBIA0575E
PBIC2042E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-32
< SERVICE INFORMATION >[VQ35DE]
OIL PAN AND OIL STRAINER
21. Remove oil strainer.
22. Remove transmission joint bolts which pierce oil pan (upper). Refer to
AT-241, "
Removal and Installation
(2WD Models)".
23. Remove rear cover plate.
24. Loosen mounting bolts in the reverse order as shown in the fig- ure with power tool to remove.
 Insert the seal cutter [SST: KV10111100 (J37228)] between oil
pan (upper) and cylinder block. Slide seal cutter by tapping on
the side of tool with a hammer. Remove oil pan (upper).
CAUTION:
 Be careful not to damage the mating surfaces.
 Do not insert a screwdriver, this will damage the matingsurfaces.
25. Remove O-rings from bottom of cylinder block and oil pump.
26. Remove oil pan gaskets.
INSPECTION AFTER REMOVAL
Clean oil strainer if any object attached.
INSTALLATION
1. Install oil pan (upper) as follows:
a. Use a scraper to remove old li quid gasket from mating surfaces.
CAUTION:
Do not scratch or damage the mating surfaces when clean-
ing off old liquid gasket.
 Also remove old liquid gasket from mating surface of cylinder block.
 Remove old liquid gasket from the bolt holes and threads.
b. Install new oil pan gaskets.
PBIC0783E
PBIC1144E
PBIC1145E
MEM108A
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-34
< SERVICE INFORMATION >[VQ35DE]
OIL PAN AND OIL STRAINER
 Tighten mounting bolts in numerical order as shown in the fig-
ure.
 There are two types of mounting bolts. Refer to the following
for locating bolts.
f. Tighten transmission joint bolts. Refer to AT-241, "
Removal and Installation (2WD Models)".
2. Install oil strainer to oil pump.
3. Install oil pan (lower) as follows:
a. Use scraper to remove old liquid gasket from mating surfaces.  Also remove old liquid gasket from mating surface of oil pan(upper).
 Remove old liquid gasket from the bolt holes and thread.
CAUTION:
Do not scratch or damage the mating surfaces when clean-
ing off old liquid gasket.
b. Apply a continuous bead of liquid gasket with the tube presser (commercial service tool) to the oil pan (lower) as shown in the
figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
CAUTION:
Attaching should be done with in 5 minutes after coating.
c. Install oil pan (lower). M8
× 100 mm (3.94 in) : 5, 7, 8, 11
M8 × 25 mm (0.98 in) : Except the above
PBIC0783E
SEM958F
PBIC2657E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

OIL PAN AND OIL STRAINEREM-37
< SERVICE INFORMATION > [VQ35DE]
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23. Remove crankshaft position sensor (POS).
CAUTION:
 Handle carefully to avoid dropping and shocks.
 Do not disassemble.
 Do not allow metal powder to adhere to magnetic part at sensor tip.
 Do not place sensors in a location wh ere they are exposed to magnetism.
24. Remove oil pan (lower) as follows:
a. Loosen mounting bolts in reverse order as shown in the figure to remove.
b. Insert the seal cutter (SST) between oil pan (upper) and oil pan (lower).
c. Slide the seal cutter by tapping on the side of tool with a ham- mer. Remove oil pan (lower).
CAUTION:
 Be careful not to damage the mating surface.
 Do not insert flat-bladed screw driver, this will damage the
mating surface.
25. Remove oil strainer.
26. Remove transmission joint bolts which pierce oil pan (upper). Refer to AT-241, "
Removal and Installation
(2WD Models)".
27. Loosen mounting bolts in the reverse order as shown in the fig- ure with power tool to remove.
 Insert the seal cutter [SST: KV10111100 (J37228)] between oilpan (upper) and cylinder block. Slide seal cutter by tapping on
the side of tool with a hammer. Remove oil pan (upper).
CAUTION:
 Be careful not to damage the mating surfaces.
 Do not insert a screwdriver, this will damage the mating
surfaces.
28. Remove O-rings from bottom of cylinder block and oil pump.
PBIC0782E
SEM960F
PBIC0783E
PBIC1144E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-40
< SERVICE INFORMATION >[VQ35DE]
OIL PAN AND OIL STRAINER
d. Apply a continuous bead of liquid gasket with the tube presser
(commercial service tool) to the cylinder block mating surface of
oil pan (upper) to a limited portion as shown in the figure.
Use Genuine RTV Silicone Seal ant or equivalent. Refer to
GI-44, "
Recommended Chemical Product and Sealant".
CAUTION:
 For bolt holes with marks (5 locations), apply liquid
gasket outside the holes.
 Apply a bead of 4.5 to 5.5 mm (0.177 to 0.217 in) in diame-
ter to area “A”.
 Attaching should be done wit hin 5 minutes after coating.
e. Install oil pan (upper). CAUTION:
Install avoiding misalignment of both oil pan gasket and O-rings.
 Tighten mounting bolts in numerical order as shown in the fig- ure.
 There are two types of mounting bolts. Refer to the following
for locating bolts.
f. Tighten transmission joint bolts. Refer to AT-241, "
Removal and Installation (2WD Models)".
3. Install oil strainer to oil pump.
4. Install oil pan (lower) as follows:
a. Use scraper to remove old liquid gasket from mating surfaces.  Also remove old liquid gasket from mating surface of oil pan(upper).
 Remove old liquid gasket from the bolt holes and thread.
CAUTION:
Do not scratch or damage the mating surfaces when clean-
ing off old liquid gasket. M8
× 100 mm (3.94 in) : 5, 7, 8, 11
M8 × 25 mm (0.98 in) : Except the above
PBIC2300E
PBIC0783E
SEM958F
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

FRONT TIMING CHAIN CASEEM-63
< SERVICE INFORMATION > [VQ35DE]
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 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
*: Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc. Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EM-82
< SERVICE INFORMATION >[VQ35DE]
TIMING CHAIN
e. Further tighten by 90 degrees. (Angle tightening)
 Check the tightening angle by referencing to the notches. Theangle between two notches is 90 degrees.
19. Rotate crankshaft pulley in normal direction (clock wise when viewed from front) to confirm it turns
smoothly.
20. For the following operations, perform steps in the reverse order of removal.
INSPECTION AFTER INSTALLATION
Inspection for Leaks
The following are procedures for checking fluids leak, lubricates leak. Before starting engine, check oil/fluid levels incl uding engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to GI-44, "
Recommended Chemical Product and Sealant".
 Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
- Start engine. With engine speed increased, che ck again for fuel leakage at connection points.
 Run engine to check for unusual noise and vibration. NOTE:
If hydraulic pressure inside chain tensioner drops af ter removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate an unusualness. Noise
will stop after hydraulic pressure rises.
 Warm up engine thoroughly to make sure there is no leakage of fuel, or any oil/fluids including engine oil and engine coolant.
 Bleed air from lines and hoses of applic able lines, such as in cooling system.
 After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the specified level, if necessary.
Summary of the inspection items:
*: Transmission/transaxle/CVT fluid. power steering fluid, brake fluid, etc.
PBIC4821E
Items Before starting engine Engine running After engine stopped
Engine coolant Level Leakage Level
Engine oil Level Leakage Level
Other oils and fluid* Level Leakage Level
Fuel Leakage Leakage Leakage
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C