2008 INFINITI FX35 Service Manual

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Page 2313 of 3924

INFINITI FX35 2008 Service Manual
DTC P1572 ASCD BRAKE SWITCHEC-1073
< SERVICE INFORMATION > [VK45DE]
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6.DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Harness for open

Page 2314 of 3924

INFINITI FX35 2008 Service Manual
EC-1074
< SERVICE INFORMATION >[VK45DE]
DTC P1572 ASCD BRAKE SWITCH
NG >> GO TO 11.
11 .DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Harness for open or short betw

Page 2315 of 3924

INFINITI FX35 2008 Service Manual
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 rec

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

Page 2316 of 3924

INFINITI FX35 2008 Service Manual
EC-1076
< SERVICE INFORMATION >[VK45DE]
DTC P1574 ICC VEHIC
LE SPEED SENSOR
OK >> GO TO 3.
NG >> Repair or replace.
3.CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Check combination meter function.

Page 2317 of 3924

INFINITI FX35 2008 Service Manual
DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-1077
< SERVICE INFORMATION > [VK45DE]
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DTC P1574 ASCD VEHIC
LE SPEED SENSOR
Component DescriptionINFOID:0000000001326953
The ECM

DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-1077
< SERVICE INFORMATION > [VK45DE]
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DTC P1574 ASCD VEHIC
LE SPEED SENSOR
Component DescriptionINFOID:0000000001326953
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from “unified
meter and A/C amp.”, and the other is from TCM (Tr ansmission control module). The ECM uses these signals
for ASCD control. Refer to EC-615
for ASCD functions.
On Board Diagnosis LogicINFOID:0000000001326954
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 DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-1007
DTC Confirmation ProcedureINFOID:0000000001326955
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 (25 MPH).
3. Check DTC.
4. If DTC is detected, go to EC-1077, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326956
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 ASCD 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

Page 2318 of 3924

INFINITI FX35 2008 Service Manual
EC-1078
< SERVICE INFORMATION >[VK45DE]
DTC P1574 ASCD VEHICLE SPEED SENSOR
OK >> GO TO 3.
NG >> Repair or replace.
3.CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-26
.
>> INSPECTION E

Page 2319 of 3924

INFINITI FX35 2008 Service Manual
DTC P1715 INPUT SPEED SENSOR (TURBINE REVOLUTION SENSOR)
EC-1079
< SERVICE INFORMATION > [VK45DE]
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DTC P1715 INPUT SPEED SENSOR (T
URBINE REVOLUTION SENSOR)
Description

DTC P1715 INPUT SPEED SENSOR (TURBINE REVOLUTION SENSOR)
EC-1079
< SERVICE INFORMATION > [VK45DE]
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DTC P1715 INPUT SPEED SENSOR (T
URBINE REVOLUTION SENSOR)
DescriptionINFOID:0000000001326957
ECM receives turbine revolution sensor signal from TCM through CAN communication line. ECM uses this
signal for engine control.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326958
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001326959
NOTE:
If DTC P1715 is displayed with DTC U1000, U1001 fi rst perform the trouble diagnosis for DTC U1000,
U1001. Refer to EC-724
.
If DTC P1715 is displayed with DTC U1010 first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-726
.
If DTC P1715 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-1007
.
If DTC P1715 is displayed with DT C P0335, first perform the trouble diagnosis for DTC P0335. Refer
to EC-906
.
If DTC P1715 is displayed with DT C P0340, first perform the trouble diagnosis for DTC P0340. Refer
to EC-911
.
The MIL will not lights up for this diagnosis.
Diagnosis ProcedureINFOID:0000000001326960
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT-38, "
OBD-II Diagnostic Trouble Code (DTC)".
OK or NG
OK >> GO TO 2.
NG >> Perform trouble shooting relevant to DTC indicated.
2.REPLACE TCM
Replace TCM. Refer to AT- 4 1
.
>> INSPECTION END
MONITOR ITEM CONDITION SPECIFICATION
I/P PULLY SPD Vehicle speed: More than 20 km/h (12 MPH) Almost the same speed as
the tachometer indication
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1715
1715 Input speed sensor
(Turbine revolution sen-
sor)
(TCM output) Turbine revolution sensor signal is differ-
ent from the theoretical value calculated
by ECM from revolution sensor signal and
engine rpm signal. Harness or connectors
(The CAN communication line is open or short-
ed)
Harness or connectors (Turbine revolution sensor circuit is open or
shorted)
TCM
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 2320 of 3924

INFINITI FX35 2008 Service Manual
EC-1080
< SERVICE INFORMATION >[VK45DE]
DTC P1800 VIAS CONT
ROL SOLENOID VALVE
DTC P1800 VIAS CONTROL SOLENOID VALVE
Component DescriptionINFOID:0000000001326961
The VIAS control solenoid valve (1) c

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