2004 INFINITI FX35 Service Manual

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Page 1881 of 4449

INFINITI FX35 2004 Service Manual EC-540
[VQ35DE]
DTC P1572 ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Component InspectionABS007ZI
ASCD BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness c

Page 1882 of 4449

INFINITI FX35 2004 Service Manual DTC P1574 ICC VEHICLE SPEED SENSOR
EC-541
[VQ35DE]
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EC
Revision: 2004 November 2004 FX35/FX45
DTC P1574 ICC VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS007ZD
The ECM re

DTC P1574 ICC VEHICLE SPEED SENSOR
EC-541
[VQ35DE]
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EC
Revision: 2004 November 2004 FX35/FX45
DTC P1574 ICC VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS007ZD
The ECM receives two vehicle speed signals via CAN communication 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-6, "
DESCRIPTION" for ICC functions.
On Board Diagnosis LogicABS007ZE
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, U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-142
.
If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500.
Refer to EC-390
.
If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-401
.
DTC Confirmation ProcedureABS007ZF
CAUTION:
Always drive vehicle at a safe speed.
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.
TESTING CONDITION:
Step 3 may be conducted with the drive 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-II
1. Start engine.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Drive the vehicle at more than 40 km/h (25MPH).
4. If DTC is detected, go to EC-542, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P1574
1574ICC vehicle speed
sensorECM 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
SEF058Y

Page 1883 of 4449

INFINITI FX35 2004 Service Manual EC-542
[VQ35DE]
DTC P1574 ICC VEHICLE SPEED SENSOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS007ZG
1. CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT- 3 8 , "
ON BOARD DIAGNOST

Page 1884 of 4449

INFINITI FX35 2004 Service Manual DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-543
[VQ35DE]
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MA
EC
Revision: 2004 November 2004 FX35/FX45
DTC P1574 ASCD VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS006WQ
The ECM

DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-543
[VQ35DE]
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K
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MA
EC
Revision: 2004 November 2004 FX35/FX45
DTC P1574 ASCD VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS006WQ
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 (Transmission control module). The ECM uses these signals
for ASCD control. Refer to EC-657, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for ASCD functions.
On Board Diagnosis LogicABS006WR
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1574 is displayed with DTC U1000, U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-142
.
If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500.
Refer to EC-390
If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-401
DTC Confirmation ProcedureABS006WS
CAUTION:
Always drive vehicle at a safe speed.
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.
TESTING CONDITION:
Step 3 may be conducted with the drive 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-II
1. Start engine.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Drive the vehicle at more than 40 km/h (25 MPH).
4. If DTC is detected, go to EC-544, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.Trouble Diagnosis
NameDTC Detecting Condition Possible Cause
P1574
1574ASCD vehicle speed
sensorECM 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
SEF058Y

Page 1885 of 4449

INFINITI FX35 2004 Service Manual EC-544
[VQ35DE]
DTC P1574 ASCD VEHICLE SPEED SENSOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS006WT
1. CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT- 3 8 , "
ON BOARD DIAGNOS

Page 1886 of 4449

INFINITI FX35 2004 Service Manual DTC P1706 PNP SWITCH
EC-545
[VQ35DE]
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EC
Revision: 2004 November 2004 FX35/FX45
DTC P1706 PNP SWITCHPFP:32006
Component DescriptionABS006WU
When the gear position is P or N, park

DTC P1706 PNP SWITCH
EC-545
[VQ35DE]
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EC
Revision: 2004 November 2004 FX35/FX45
DTC P1706 PNP SWITCHPFP:32006
Component DescriptionABS006WU
When the gear position is P or N, park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
CONSULT-II Reference Value in Data Monitor ModeABS006WV
Specification data are reference values.
On Board Diagnosis LogicABS006WW
DTC Confirmation ProcedureABS006WX
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-II
1. Turn ignition switch ON.
2. Select “P/N POSI SW” in “DATA MONITOR” mode with CON-
SULT-II. Then check the “P/N POSI SW” signal under the follow-
ing conditions.
If NG, go to EC-548, "
Diagnostic Procedure" .
If OK, go to following step.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Start engine and warm it up to normal operating temperature.
5. Maintain the following conditions for at least 60 consecutive sec-
onds.
6. If 1st trip DTC is detected, go to EC-548, "
Diagnostic Procedure"
.
MONITOR ITEM CONDITION SPECIFICATION
P/N POSI SW
Ignition switch: ONShift lever: P or N ON
Shift lever: Except above OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1706
1706Park/neutral position
switchThe signal of the park/neutral position (PNP)
switch is not changed in the process of engine
starting and driving.
Harness or connectors
[The park/neutral position (PNP) switch
circuit is open or shorted.]
Park/neutral position (PNP) switch
Unified meter and A/C amp.
TCM
Position (Selector lever) Known-good signal
P or N position ON
Except above position OFF
ENG SPEED 1,000 - 6,375 rpm
COOLAN TEMP/S More than 70°C (158°F)
B/FUEL SCHDL 2.0 - 31.8 msec
VHCL SPEED SE More than 64 km/h (40 MPH)
Selector lever Suitable position
SEF212Y
SEF213Y

Page 1887 of 4449

INFINITI FX35 2004 Service Manual EC-546
[VQ35DE]
DTC P1706 PNP SWITCH
Revision: 2004 November 2004 FX35/FX45
Overall Function CheckABS006WY
Use this procedure to check the overall function of the park/neutral position (PNP) switch ci

Page 1888 of 4449

INFINITI FX35 2004 Service Manual DTC P1706 PNP SWITCH
EC-547
[VQ35DE]
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MA
EC
Revision: 2004 November 2004 FX35/FX45
Wiring DiagramABS006WZ
TBWM0521E

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