2004 INFINITI FX35 Service Manual

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Page 2537 of 4449

INFINITI FX35 2004 Service Manual EC-1196
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DTC P1572 ICC BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
12. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness c

Page 2538 of 4449

INFINITI FX35 2004 Service Manual DTC P1572 ICC BRAKE SWITCH
EC-1197
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Revision: 2004 November 2004 FX35/FX45
15. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Joint co

Page 2539 of 4449

INFINITI FX35 2004 Service Manual EC-1198
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DTC P1572 ICC BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
2. Check continuity between relay terminals 3 and 4, 6 and 7 under
the following conditions.
3. If NG, replace ICC br

Page 2540 of 4449

INFINITI FX35 2004 Service Manual DTC P1572 ASCD BRAKE SWITCH
EC-1199
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Revision: 2004 November 2004 FX35/FX45
DTC P1572 ASCD BRAKE SWITCHPFP:25320
Component DescriptionABS00CCF
When the brake pedal is

DTC P1572 ASCD BRAKE SWITCH
EC-1199
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Revision: 2004 November 2004 FX35/FX45
DTC P1572 ASCD BRAKE SWITCHPFP:25320
Component DescriptionABS00CCF
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-1334, "
AUTOMATIC SPEED CONTROL DEVICE
(ASCD)" for the ASCD function.
CONSULT-II Reference Value in Data Monitor ModeABS00CCG
Specification data are reference values.
On Board Diagnosis LogicABS00CCH
This self-diagnosis has the one trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
If DTC P 1572 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605.
Refer to EC-1057
.
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.
PBIB1506E
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW 1
(ASCD brake switch)
Ignition switch: ONBrake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW 2
(stop lamp switch)
Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
DTC No.Trouble diagnosis
nameDTC detecting condition Possible cause
P1572
1572ASCD brake switchA)
When the vehicle speed is above 30 km/h
(19 MPH), ON signals from the stop lamp
switch and the ASCD brake switch are
sent to the ECM at the same time.Harness or connectors
(The stop lamp switch circuit is open or
shorted.)
Harness or connectors
(The ASCD brake switch circuit is open or
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
vehicle is driving.

Page 2541 of 4449

INFINITI FX35 2004 Service Manual EC-1200
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DTC P1572 ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS00CCI
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedu

Page 2542 of 4449

INFINITI FX35 2004 Service Manual DTC P1572 ASCD BRAKE SWITCH
EC-1201
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Revision: 2004 November 2004 FX35/FX45
Wiring Diagram ABS00CCJ
TBWM0258E

Page 2543 of 4449

INFINITI FX35 2004 Service Manual EC-1202
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DTC P1572 ASCD BRAKE SWITCH
Revision: 2004 November 2004 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM g

Page 2544 of 4449

INFINITI FX35 2004 Service Manual DTC P1572 ASCD BRAKE SWITCH
EC-1203
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Revision: 2004 November 2004 FX35/FX45
2. CHECK OVERALL FUNCTION-II
With CONSULT-II
Check “BRAKE SW2” indication in “DATA

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