2005 INFINITI FX35 Service Manual

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Page 1985 of 4731

INFINITI FX35 2005 Service Manual EC-592
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DTC P1572 ICC BRAKE SWITCH
Revision: 2005 July 2005 FX
2. CHECK OVERALL FUNCTION-II
With CONSULT-II
Check “BRAKE SW2” indication in “DATA MONITOR” mode.
Without CONSULT-I

Page 1986 of 4731

INFINITI FX35 2005 Service Manual DTC P1572 ICC BRAKE SWITCH EC-593
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Revision: 2005 July 2005 FX
4. CHECK ICC BRAKE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ICC brake

Page 1987 of 4731

INFINITI FX35 2005 Service Manual EC-594
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DTC P1572 ICC BRAKE SWITCH
Revision: 2005 July 2005 FX
6. DETECT MALFUNCTIONING PART
Check the following.
Fuse block (J/B) connector E201
10A fuse
Harness for open or short between

Page 1988 of 4731

INFINITI FX35 2005 Service Manual DTC P1572 ICC BRAKE SWITCH EC-595
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Revision: 2005 July 2005 FX
12. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconn

Page 1989 of 4731

INFINITI FX35 2005 Service Manual EC-596
[VQ35DE]
DTC P1572 ICC BRAKE SWITCH
Revision: 2005 July 2005 FX
16. CHECK STOP LAMP SWITCH
Refer to EC-596, "
Component Inspection"
OK or NG
OK >> GO TO 17.
NG >> Replace stop lamp switc

Page 1990 of 4731

INFINITI FX35 2005 Service Manual DTC P1572 ASCD BRAKE SWITCH EC-597
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Revision: 2005 July 2005 FX
DTC P1572 ASCD BRAKE SWITCHPFP:25320
Component DescriptionABS006WJ
When the brake pedal

DTC P1572 ASCD BRAKE SWITCH EC-597
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Revision: 2005 July 2005 FX
DTC P1572 ASCD BRAKE SWITCHPFP:25320
Component DescriptionABS006WJ
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to EC-36, "
AUTOMATIC SPEED CONTROL DEVICE (ASCD)"
for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeABS006WK
Specification data are reference values.
On Board Diagnosis LogicABS006WL
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-402, "
DTC P0605 ECM"
This self-diagnosis has the one trip detection logic. When malfunction A is detected, DTC is not
stored in ECM memory. And in that case, 1st trip DTC and 1st trip freeze frame data are displayed.
1st trip DTC is erased when ignition switch OFF. And even when malfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
PBIB1605E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW1
(ASCD brake switch)
Ignition switch: ON Brake pedal: Fully released ON
Brake pedal: Slightly
depressed OFF
BRAKE SW2
(Stop lamp switch)
Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly
depressed ON
DTC No.Trouble Diagnosis
Name DTC Detecting Condition Possible Cause
P1572
1572 ASCD brake switch A)
When the vehicle speed is above 30km/h
(19 MPH), ON signals from the stop lamp
switch and the ASCD brake switch are sent
to ECM at the same time.
Harness or connectors
(The stop lamp switch circuit is shorted.)
Harness or connectors
(The ASCD brake switch circuit is shorted.)
Stop lamp switch
ASCD brake switch
Incorrect stop lamp switch installation
Incorrect ASCD brake switch installation
ECM
B)
ASCD brake switch signal is not sent to
ECM for extremely long time while the vehi-
cle is driving

Page 1991 of 4731

INFINITI FX35 2005 Service Manual EC-598
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DTC P1572 ASCD BRAKE SWITCH
Revision: 2005 July 2005 FX
DTC Confirmation ProcedureABS006WM
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has bee

Page 1992 of 4731

INFINITI FX35 2005 Service Manual DTC P1572 ASCD BRAKE SWITCH EC-599
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Revision: 2005 July 2005 FX
Wiring Diagram ABS006WN
TBWM0404E

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