Nissan X-Trail 32. Instruction — part 901
P1572 BRAKE PEDAL POSITION SWITCH
EC-733
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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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-2
1.
Adjust brake pedal position switch installation. Refer to
BR-22, "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:0000000010986440
1.
CHECK STOP LAMP SWITCH-1
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-2
1.
Adjust stop lamp switch installation. Refer to
BR-22, "Inspection and Adjustment"
2.
Check the continuity between stop lamp switch terminals as per the following conditions.
Brake pedal position switch
Condition
Continuity
+
−
Terminals
1
2
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
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
EC-734
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P1572 BRAKE PEDAL POSITION SWITCH
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch. Refer to
.
Stop lamp switch
Condition
Continuity
+
−
Terminals
1
2
Brake pedal
Fully released
Not existed
Slightly de-
pressed
Existed
P1574 ASCD VEHICLE SPEED SENSOR
EC-735
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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P1574 ASCD VEHICLE SPEED SENSOR
Description
INFOID:0000000010986441
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combina-
tion meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD
control. Refer to
EC-473, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description"
for ASCD
functions.
DTC Description
INFOID:0000000010986442
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (CAN communication line is open or shorted.)
• ABS actuator and electric unit (control unit)
• TCM
• ECM
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.
CHECK DTC PRIORITY
If DTC P1574 is displayed with DTC U1001, P0500, P0603, P0604, P0605, P0606, P0607, P060A or P060B,
first perform the trouble diagnosis for DTC U1001, P0500, P0603, P0604, P0605, P0606, P0607, P060A or
P060B.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
NO
>> GO TO 2.
2.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine.
2.
Drive the vehicle at more than 40 km/h (25 MPH).
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.
3.
Check DTC.
Is DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P1574
ASCD VHL SPD SEN
(ASCD VHL SPD SEN)
ECM detects a difference between two vehicle speed signals is out of the
specified range.
EC-736
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P1574 ASCD VEHICLE SPEED SENSOR
Diagnosis Procedure
INFOID:0000000010986443
1.
CHECK DTC PRIORITY
If DTC P1574 is displayed with DTC U1001, P0500, P0603, P0604, P0605, P0606, P0607, P060A or P060B,
first perform the trouble diagnosis for DTC U1001, P0500, P0603, P0604, P0605, P0606, P0607, P060A or
P060B.
Is applicable DTC detected?
YES
>> Perform diagnosis of applicable. Refer to
NO
>> GO TO 2.
2.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
.
Is DTC detected?
NO
>> GO TO 3.
YES
>> Perform trouble shooting relevant to DTC indicated.
3.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Check DTC with ABS actuator and electric unit (control unit). Refer to
Is DTC detected?
NO
>> INSPECTION END
YES
>> Perform trouble shooting relevant to DTC indicated.
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