2008 INFINITI QX56 Factory Service Manual

Page 1649 of 4083

INFINITI QX56 2008  Factory Service Manual EC-350
< COMPONENT DIAGNOSIS >[VK56DE]
P1572 ASCD BRAKE SWITCH
5.CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Ch

Page 1650 of 4083

INFINITI QX56 2008  Factory Service Manual P1572 ASCD BRAKE SWITCHEC-351
< COMPONENT DIAGNOSIS > [VK56DE]
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3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open

Page 1651 of 4083

INFINITI QX56 2008  Factory Service Manual EC-352
< COMPONENT DIAGNOSIS >[VK56DE]
P1574 ICC VEHICLE SPEED SENSOR
P1574 ICC VEHICLE
 SPEED SENSOR
Component DescriptionINFOID:0000000001528791
The ECM receives two vehicle speed signals via CAN co

Page 1652 of 4083

INFINITI QX56 2008  Factory Service Manual P1574 ICC VEHICLE SPEED SENSOR
EC-353
< COMPONENT DIAGNOSIS > [VK56DE]
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2.CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Refer to  BRC-24, "
CONSULT-

Page 1653 of 4083

INFINITI QX56 2008  Factory Service Manual EC-354
< COMPONENT DIAGNOSIS >[VK56DE]
P1574 ASCD VEHICLE SPEED SENSOR
P1574 ASCD VEHICLE SPEED SENSOR
Component DescriptionINFOID:0000000001365781
The ECM receives two vehicle speed sensor signals vi

Page 1654 of 4083

INFINITI QX56 2008  Factory Service Manual P1574 ASCD VEHICLE SPEED SENSOREC-355
< COMPONENT DIAGNOSIS > [VK56DE]
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2.CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Refer to  BRC-24, "
CONSULT-III Fu

Page 1655 of 4083

INFINITI QX56 2008  Factory Service Manual EC-356
< COMPONENT DIAGNOSIS >[VK56DE]
P1805 BRAKE SWITCH
P1805 BRAKE SWITCH
DescriptionINFOID:0000000001528795
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pe

Page 1656 of 4083

INFINITI QX56 2008  Factory Service Manual P1805 BRAKE SWITCHEC-357
< COMPONENT DIAGNOSIS > [VK56DE]
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1. Disconnect stop lamp switch harness connector.
2. Check voltage between stop lamp switch terminal 3 and gro