2004 INFINITI QX56 Factory Service Manual

Page 1721 of 3371

INFINITI QX56 2004  Factory Service Manual EC-530Revision: August 2007
DTC P1572 ICC BRAKE SWITCH
2004 QX56
4. CHECK ICC BRAKE HOLD RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ICC brake hold relay.
3. Turn ignition sw

Page 1722 of 3371

INFINITI QX56 2004  Factory Service Manual DTC P1572 ICC BRAKE SWITCH
EC-531
C
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EC
Revision: August 20072004 QX56
7. CHECK ICC BRAKE SWITCH INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continui

Page 1723 of 3371

INFINITI QX56 2004  Factory Service Manual EC-532Revision: August 2007
DTC P1572 ICC BRAKE SWITCH
2004 QX56
11 .  DETECT MALFUNCTIONING PART
Check the following.
Harness connectors M31, E152
Fuse block (J/B) connector M60
10A fuse
Harness

Page 1724 of 3371

INFINITI QX56 2004  Factory Service Manual DTC P1572 ICC BRAKE SWITCH
EC-533
C
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EC
Revision: August 20072004 QX56
3. Check continuity between stop lamp switch terminals 3 and 4
under the following conditions.
If NG, adjust

Page 1725 of 3371

INFINITI QX56 2004  Factory Service Manual EC-534Revision: August 2007
DTC P1572 ASCD BRAKE SWITCH
2004 QX56
DTC P1572 ASCD BRAKE SWITCHPFP:25320
Component DescriptionUBS00HBF
When the brake pedal is depressed, ASCD brake switch is turned
OFF

Page 1726 of 3371

INFINITI QX56 2004  Factory Service Manual DTC P1572 ASCD BRAKE SWITCH
EC-535
C
D
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EC
Revision: August 20072004 QX56
DTC Confirmation ProcedureUBS00HBI
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation

Page 1727 of 3371

INFINITI QX56 2004  Factory Service Manual EC-536Revision: August 2007
DTC P1572 ASCD BRAKE SWITCH
2004 QX56
Wiring DiagramUBS00HBJ
BBWA11 94 E

Page 1728 of 3371

INFINITI QX56 2004  Factory Service Manual DTC P1572 ASCD BRAKE SWITCH
EC-537
C
D
E
F
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MA
EC
Revision: August 20072004 QX56
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not u