2004 INFINITI FX35 Service Manual

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Page 2545 of 4449

INFINITI FX35 2004 Service Manual EC-1204
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DTC P1572 ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
3. CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ASCD brake switch harness

Page 2546 of 4449

INFINITI FX35 2004 Service Manual DTC P1572 ASCD BRAKE SWITCH
EC-1205
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Revision: 2004 November 2004 FX35/FX45
7. CHECK ASCD BRAKE SWITCH
Refer to EC-1206, "
Component Inspection"
OK or NG
OK >> GO T

Page 2547 of 4449

INFINITI FX35 2004 Service Manual EC-1206
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DTC P1572 ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
11 . DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Joint connector-2
Harness for

Page 2548 of 4449

INFINITI FX35 2004 Service Manual DTC P1574 ICC VEHICLE SPEED SENSOR
EC-1207
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Revision: 2004 November 2004 FX35/FX45
DTC P1574 ICC VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS00CCM
The ECM r

Page 2549 of 4449

INFINITI FX35 2004 Service Manual EC-1208
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DTC P1574 ICC VEHICLE SPEED SENSOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS00CCP
1. CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT- 3 8 , "
ON BOARD DIAGNOS

Page 2550 of 4449

INFINITI FX35 2004 Service Manual DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-1209
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Revision: 2004 November 2004 FX35/FX45
DTC P1574 ASCD VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS00CCQ
The ECM

DTC P1574 ASCD VEHICLE SPEED SENSOR
EC-1209
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Revision: 2004 November 2004 FX35/FX45
DTC P1574 ASCD VEHICLE SPEED SENSORPFP:31036
Component DescriptionABS00CCQ
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-1334, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)" for ASCD func-
tions.
On Board Diagnosis LogicABS00CCR
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-792, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500.
Refer to EC-1046, "
DTC P0500 VSS"
If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-1057, "
DTC P0605 ECM"
DTC Confirmation ProcedureABS00CCS
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 (VDC switch OFF).
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-1210, "
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 2551 of 4449

INFINITI FX35 2004 Service Manual EC-1210
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DTC P1574 ASCD VEHICLE SPEED SENSOR
Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureABS00CCT
1. CHECK DTC WITH TCM
Check DTC with TCM. Refer to AT- 3 8
.
OK or NG
OK >> GO

Page 2552 of 4449

INFINITI FX35 2004 Service Manual DTC P1706 PNP SWITCH
EC-1211
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Revision: 2004 November 2004 FX35/FX45
DTC P1706 PNP SWITCHPFP:32006
Component DescriptionABS00CCU
When the gear position is P or N, par

DTC P1706 PNP SWITCH
EC-1211
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Revision: 2004 November 2004 FX35/FX45
DTC P1706 PNP SWITCHPFP:32006
Component DescriptionABS00CCU
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 ModeABS00CCV
Specification data are reference values.
On Board Diagnosis LogicABS00CCW
DTC Confirmation ProcedureABS00CCX
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-1214, "
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-1214, "
Diagnostic Proce-
dure" .
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
N or P position ON
Except above position OFF
ENG SPEED 1,200 - 6375 rpm
COOLAN TEMP/S More than 70°C (158°F)
B/FUEL SCHDL More than 2.0 msec
VHCL SPEED SE More than 64 km/h (40 MPH)
Selector lever Suitable position
SEF212Y
SEF213Y

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