2008 INFINITI QX56 Factory Service Manual

Page 1641 of 4083

INFINITI QX56 2008  Factory Service Manual EC-342
< COMPONENT DIAGNOSIS >[VK56DE]
P1572 ICC BRAKE SWITCH
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to 
EC-342, "
Diagnosis Procedure".
If 1st trip DTC is not detec ted, go to the

Page 1642 of 4083

INFINITI QX56 2008  Factory Service Manual P1572 ICC BRAKE SWITCHEC-343
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
 
Without CONSULT-IIl
Check voltage between ECM terminal 101 and ground under the fol-
lowing conditions.

Page 1643 of 4083

INFINITI QX56 2008  Factory Service Manual EC-344
< COMPONENT DIAGNOSIS >[VK56DE]
P1572 ICC BRAKE SWITCH
7.CHECK DTC WITH ICC UNIT
Refer to  CCS-18
.
OK or NG
OK >> GO TO 8.
NG >> Repair or replace.
8.CHECK POWER SUPPLY CIRCUIT
1. Turn ignitio

Page 1644 of 4083

INFINITI QX56 2008  Factory Service Manual P1572 ICC BRAKE SWITCHEC-345
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Check the following.
• Harness connectors M31, E152
• Fuse block (J/B) connector M60
• 10A fuse
•

Page 1645 of 4083

INFINITI QX56 2008  Factory Service Manual EC-346
< COMPONENT DIAGNOSIS >[VK56DE]
P1572 ICC BRAKE SWITCH
Component Inspection
INFOID:0000000001365772
ICC BRAKE SWITCH
1. Turn ignition switch OFF.
2. Disconnect ICC brake switch harness connecto

Page 1646 of 4083

INFINITI QX56 2008  Factory Service Manual P1572 ASCD BRAKE SWITCHEC-347
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P1572 ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000001528784
When the brake pedal is depressed,

Page 1647 of 4083

INFINITI QX56 2008  Factory Service Manual EC-348
< COMPONENT DIAGNOSIS >[VK56DE]
P1572 ASCD BRAKE SWITCH
5. Check 1st trip DTC.
6. If 1st trip DTC is detected, go to 
EC-348, "
Diagnosis Procedure".
If 1st trip DTC is not detec ted, go to the

Page 1648 of 4083

INFINITI QX56 2008  Factory Service Manual P1572 ASCD BRAKE SWITCHEC-349
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
 Without CONSULT-III
Check voltage between ECM terminal 101 and ground under the following conditions.
OK