2011 NISSAN LATIO Service Repair Manual

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Page 2225 of 3787

NISSAN LATIO 2011 Service Repair Manual DTC P1572 ASCD BRAKE SWITCHEC-931
< SERVICE INFORMATION > [MR18DE]
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DTC P1572 ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000006342129
When the brake pedal is depr

DTC P1572 ASCD BRAKE SWITCHEC-931
< SERVICE INFORMATION > [MR18DE]
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DTC P1572 ASCD BRAKE SWITCH
Component DescriptionINFOID:0000000006342129
When the brake pedal is depressed, ASCD brake switch (2) is
turned OFF and stop lamp switch (1) is turned ON. ECM detects the
state of the brake pedal by this
input of two kinds (ON/OFF signal).
Refer to EC-523
for the ASCD function.
CONSULT-III Reference Val ue in Data Monitor ModeINFOID:0000000006342130
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000006342131
This self-diagnosis has the on e trip detection logic.
The MIL will not light up for this diagnosis.
NOTE:
• If DTC P1572 is displayed with DT C P0605, first perform the trouble diagnosis for DTC P0605. Refer
to EC-895
.
• 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 ma lfunction A is detected in two
consecutive trips, DTC is not stored in ECM memory.
BBIA0708E
Monitor item ConditionSpecification
BRAKE SW1
(ASCD brake switch) • Ignition switch: ON• Brake pedal: Fully released (A/T, CVT)
• Brake pedal and clutch pedal: Fully re-
leased (M/T) ON
• Brake pedal: Slightly depressed (A/T, CVT)
• Brake pedal and/or clutch pedal: Slight- ly depressed (M/T) OFF
BRAKE SW2
(Stop lamp switch) • Ignition switch: ONBrake 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
(Stop lamp switch circuit is shorted.)
• Harness or connectors (ASCD brake switch circuit is shorted.)
• Harness or connectors
(ASCD clutch switch circuit is shorted.)
(M/T)
• Stop lamp switch
• ASCD brake switch
• ASCD clutch switch (M/T)
• Incorrect stop lamp switch installation
• Incorrect ASCD brake switch installation
• Incorrect ASCD clutch switch installation (M/T)
•ECM
B)
ASCD brake switch signal is not sent to ECM
for extremely long time while the vehicle is
driving
Revision: May 2010
2011 Versa

Page 2226 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-932
< SERVICE INFORMATION >[MR18DE]
DTC P1572 ASCD BRAKE SWITCH
DTC Confirmation Procedure
INFOID:0000000006342132
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
• If DTC Confirmation Proce

Page 2227 of 3787

NISSAN LATIO 2011 Service Repair Manual DTC P1572 ASCD BRAKE SWITCHEC-933
< SERVICE INFORMATION > [MR18DE]
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Wiring DiagramINFOID:0000000006342133
Specification data are reference values and are measured betwee

Page 2228 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-934
< SERVICE INFORMATION >[MR18DE]
DTC P1572 ASCD BRAKE SWITCH
Diagnosis Procedure
INFOID:0000000006342134
1.CHECK OVERALL FUNCTION-I
With CONSULT-III
1. Turn ignition switch ON.
2. Select “BRA

Page 2229 of 3787

NISSAN LATIO 2011 Service Repair Manual DTC P1572 ASCD BRAKE SWITCHEC-935
< SERVICE INFORMATION > [MR18DE]
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Without CONSULT-III
Check voltage between ECM terminal 99 and ground under the fol-
lowing condition

Page 2230 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-936
< SERVICE INFORMATION >[MR18DE]
DTC P1572 ASCD BRAKE SWITCH
2. Disconnect ASCD brake switch (2) harness connector.
- Stop lamp switch (1)
3. Turn ignition switch ON.
4. Check voltage between AS

Page 2231 of 3787

NISSAN LATIO 2011 Service Repair Manual DTC P1572 ASCD BRAKE SWITCHEC-937
< SERVICE INFORMATION > [MR18DE]
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OK or NG
OK >> GO TO 15.
NG >> Replace ASCD brake switch.
9.CHECK ASCD CLUTCH SWITCH INPUT SIGNAL CIR

Page 2232 of 3787

NISSAN LATIO 2011 Service Repair Manual EC-938
< SERVICE INFORMATION >[MR18DE]
DTC P1572 ASCD BRAKE SWITCH
• Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in har

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