Nissan Juke F15. Instruction — part 574
P1572 ASCD BRAKE SWITCH
EC-1109
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
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3.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION B
1. Drive the vehicle for at least 5 consecutive seconds as per the following conditions.
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle.
If a road test is expected to be easier, it is unnecessary to lift the vehicle.
2. Check DTC.
Is DTC detected?
YES
>> Proceed to
EC-1113, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000012198633
1.
CHECK OVERALL FUNCTION-I
With CONSULT
1. Turn ignition switch ON.
2. Select “BRAKE SW1” in “DATA MONITOR” mode of “ENGINE” using CONSULT.
3. Check “BRAKE SW1” indication as per the following conditions.
Without CONSULT
1. Turn ignition switch ON.
2. Check the voltage between ECM harness connector terminals as per the following.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> GO TO 3.
2.
CHECK OVERALL FUNCTION-II
With CONSULT
Select “BRAKE SW2” and check indication as per the following conditions.
Without CONSULT
Check the voltage between ECM harness connector terminals as per the following conditions.
Vehicle speed
More than 30 km/h (19 mph)
Selector lever
Suitable position
Driving location
Depress the brake pedal for more
than five seconds so as not to come
off from the above-mentioned vehi-
cle speed.
Monitor item
Condition
Indication
BRAKE SW1
Brake pedal
Slightly depressed
OFF
Fully released
ON
ECM
Condition
Voltage
(Approx.)
Connector
+
–
Terminal
E19
140
152
Brake pedal
Slightly depressed
0 V
Fully released
Battery voltage
Monitor item
Condition
Indication
BRAKE SW2
Brake pedal
Slightly depressed
ON
Fully released
OFF
EC-1110
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
P1572 ASCD BRAKE SWITCH
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-45, "Intermittent Incident"
.
NO
>> GO TO 6.
3.
CHECK BRAKE PEDAL POSITION SWITCH POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect brake pedal position switch harness connector.
3. Turn ignition switch ON.
4. Check the voltage between brake pedal position switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Perform the trouble diagnosis for power supply circuit.
4.
CHECK BRAKE PEDAL POSITION SWITCH INPUT SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between brake pedal position switch harness connector and ECM harness connec-
tor.
4. Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK BRAKE PEDAL POSITION SWITCH
Check the brake pedal position switch. Refer to
EC-1111, "Component Inspection (Brake Pedal Position
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-45, "Intermittent Incident"
.
NO
>> Replace brake pedal position switch. Refer to
6.
CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the voltage between stop lamp switch harness connector and ground.
ECM
Condition
Voltage
(Approx.)
Connector
+
–
Terminal
E19
139
152
Brake pedal
Slightly depressed
Battery voltage
Fully released
0 V
+
−
Voltage
Brake pedal position switch
Connector
Terminal
E112
1
Ground
Battery voltage
+
−
Continuity
Brake pedal position switch
ECM
Connector
Terminal
Connector
Terminal
E112
2
E19
140
Existed
P1572 ASCD BRAKE SWITCH
EC-1111
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
*1: CVT models
*2: M/T models
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Perform the trouble diagnosis for power supply circuit.
7.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check the continuity between stop lamp switch harness connector and ECM harness connector.
*1: CVT models
*2: M/T models
3. Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair or replace error-detected parts.
8.
CHECK STOP LAMP SWITCH
Check the stop lamp switch. Refer to
EC-1112, "Component Inspection (Stop Lamp Switch)"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-45, "Intermittent Incident"
.
NO
>> Replace stop lamp switch. Refer to
.
Component Inspection (Brake Pedal Position Switch)
INFOID:0000000012198634
1.
CHECK BRAKE PEDAL POSITION SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect brake pedal position harness connector.
3. Check the continuity between brake pedal position switch terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK BRAKE PEDAL POSITION SWITCH-II
+
−
Voltage
Stop lamp switch
Connector
Terminal
E102
*1
E118
*2
1
Ground
Battery voltage
+
−
Continuity
Stop lamp switch
ECM
Connector
Terminal
Connector
Terminal
E102
*1
E118
*2
2
E19
139
Existed
Brake pedal position switch
Condition
Continuity
+
-
Terminals
1
2
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
EC-1112
< DTC/CIRCUIT DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
P1572 ASCD BRAKE SWITCH
1. Adjust brake pedal position switch installation. Refer to
BR-9, "Inspection and Adjustment"
.
2. Check the continuity between brake pedal position switch terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace brake pedal position switch. Refer to
Component Inspection (Stop Lamp Switch)
INFOID:0000000012198635
1.
CHECK STOP LAMP SWITCH-I
1. Turn ignition switch OFF.
2. Disconnect stop lamp switch harness connector.
3. Check the continuity between stop lamp switch terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH-II
1. Adjust stop lamp switch installation. Refer to
BR-9, "Inspection and Adjustment"
2. Check the continuity between stop lamp switch terminals as per the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch. Refer to
.
Brake pedal position switch
Condition
Continuity
+
-
Terminals
1
2
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
Stop lamp switch
Condition
Continuity
+
-
Terminals
1
2
Brake pedal
Fully released
Not existed
Slightly de-
pressed
Existed
Stop lamp switch
Condition
Continuity
+
-
Terminals
1
2
Brake pedal
Fully released
Not existed
Slightly de-
pressed
Existed
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