2008 INFINITI FX35 Service Manual

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Page 1721 of 3924

INFINITI FX35 2008 Service Manual
DTC P1574 ICC VEHICLE SPEED SENSOREC-481
< SERVICE INFORMATION > [VQ35DE]
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DTC P1574 ICC VEHIC
LE SPEED SENSOR
Component DescriptionINFOID:0000000001326344
The ECM rece

DTC P1574 ICC VEHICLE SPEED SENSOREC-481
< SERVICE INFORMATION > [VQ35DE]
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DTC P1574 ICC VEHIC
LE SPEED SENSOR
Component DescriptionINFOID:0000000001326344
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:0000000001326345
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P1574 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-146
.
If DTC P1574 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-148
.
If DTC P1574 is displayed with DT C P0500, first perform the trouble diagnosis for DTC P0500. Refer
to EC-407
.
If DTC P1574 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-422
.
DTC Confirmation ProcedureINFOID:0000000001326346
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.
2. Drive the vehicle at more than 40 km/h (25MPH).
3. Check DTC.
4. If DTC is detected, go to EC-481, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326347
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
OK >> GO TO 3.
DTC No. Trouble Diagnosis
Name DTC Detecting Condit
ion 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
(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 1722 of 3924

INFINITI FX35 2008 Service Manual
EC-482
< SERVICE INFORMATION >[VQ35DE]
DTC P1574 ICC VEHIC
LE SPEED SENSOR
NG >> Repair or replace.
3.CHECK DTC WITH “UNIFIED METER AND A/C AMP”
Refer to DI-5
.
>> INSPECTION END
3AA93ABC3ACD3AC

Page 1723 of 3924

INFINITI FX35 2008 Service Manual
DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-483
< SERVICE INFORMATION > [VQ35DE]
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DTC P1574 ASCD VEHIC
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Component DescriptionINFOID:0000000001326348
The ECM r

DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-483
< SERVICE INFORMATION > [VQ35DE]
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DTC P1574 ASCD VEHIC
LE SPEED SENSOR
Component DescriptionINFOID:0000000001326348
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 ASCD
control. Refer to EC-37
for ASCD functions.
On Board Diagnosis LogicINFOID:0000000001326349
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this self-diagnosis.
NOTE:
If DTC P1574 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-146
.
If DTC P1574 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-148
.
If DTC P1574 is displayed with DT C P0500, first perform the trouble diagnosis for DTC P0500. Refer
to EC-407
If DTC P1574 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-422
DTC Confirmation ProcedureINFOID:0000000001326350
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.
WITH CONSULT-III
1. Start engine.
2. Drive the vehicle at more than 40 km/h (25 MPH).
3. Check DTC.
4. If DTC is detected, go to EC-483, "
Diagnosis Procedure".
Diagnosis ProcedureINFOID:0000000001326351
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 Condit
ion 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
(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 1724 of 3924

INFINITI FX35 2008 Service Manual
EC-484
< SERVICE INFORMATION >[VQ35DE]
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-5
.
>> INSPECTION END

Page 1725 of 3924

INFINITI FX35 2008 Service Manual
DTC P1715 INPUT SPEED SENSOR (TURBINE REVOLUTION SENSOR)
EC-485
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DTC P1715 INPUT SPEED SENSOR (T
URBINE REVOLUTION SENSOR)
DescriptionI

DTC P1715 INPUT SPEED SENSOR (TURBINE REVOLUTION SENSOR)
EC-485
< SERVICE INFORMATION > [VQ35DE]
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DTC P1715 INPUT SPEED SENSOR (T
URBINE REVOLUTION SENSOR)
DescriptionINFOID:0000000001326352
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:0000000001326353
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001326354
NOTE:
If DTC P1715 is displayed with DTC U1000 or U 1001 first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-146
.
If DTC P1715 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-148
.
If DTC P1715 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-422
.
If DTC P1715 is displayed with DT C P0335, first perform the trouble diagnosis for DTC P0335. Refer
to EC-319
.
If DTC P1715 is displayed with DTC P0340 or P 0345 first perform the trouble diagnosis for DTC
P0340 or P0345. Refer to EC-324
.
The MIL will not lights up for this self-diagnosis.
Diagnosis ProcedureINFOID:0000000001326355
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.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 (12MPH) 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
(CAN communication line is open or shorted)
Harness or connectors
(Turbine revolution sensor circuit is open or
shorted)
TCM
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

Page 1726 of 3924

INFINITI FX35 2008 Service Manual
EC-486
< SERVICE INFORMATION >[VQ35DE]
DTC P1805 BRAKE SWITCH
DTC P1805 BRAKE SWITCH
DescriptionINFOID:0000000001326356
Brake switch signal is applied to the ECM through t
he stop lamp switch when th

Page 1727 of 3924

INFINITI FX35 2008 Service Manual
DTC P1805 BRAKE SWITCHEC-487
< SERVICE INFORMATION > [VQ35DE]
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Wiring DiagramINFOID:0000000001326360
Specification data are reference values
and are measured between e

Page 1728 of 3924

INFINITI FX35 2008 Service Manual
EC-488
< SERVICE INFORMATION >[VQ35DE]
DTC P1805 BRAKE SWITCH
Diagnosis Procedure
INFOID:0000000001326361
1.CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when dep

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