Nissan Cube. Manual — part 368
EC-358
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P1572 ASCD BRAKE SWITCH
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> GO TO 12.
12.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors E105, M77
• 10A fuse (No.9)
• Harness for open or short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
13.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check the continuity between ECM harness connector and stop lamp switch harness connector.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 15.
NG
>> GO TO 14.
14.
DETECT MALFUNCTIONING PART
Check the following.
• Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
15.
CHECK STOP LAMP SWITCH
EC-359, "Component Inspection (Stop Lamp Switch)"
.
Is the inspection result normal?
YES
>> GO TO 16.
NO
>> Replace stop lamp switch. Refer to
.
16.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
>> INSPECTION END
Component Inspection (ASCD Brake Switch)
INFOID:0000000009947483
1.
CHECK ASCD BRAKE SWITCH-I
1.
Turn ignition switch OFF.
2.
Disconnect ASCD brake switch harness connector.
3.
Check the continuity between ASCD brake switch terminals under the following conditions.
Stop lamp switch
Ground
Voltage
Connector
Terminal
E114 (M/T)
E115 (CVT)
1
Ground
Battery voltage
ECM
Stop lamp switch
Continuity
Connector
Terminal
Connector
Terminal
E16
99
E114 (M/T)
E115 (CVT)
2
Existed
P1572 ASCD BRAKE SWITCH
EC-359
< DTC/CIRCUIT DIAGNOSIS >
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Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ASCD BRAKE SWITCH-II
1.
Adjust ASCD brake switch installation. Refer to
BR-7, "Inspection and Adjustment"
.
2.
Check the continuity between ASCD brake switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ASCD brake switch. Refer to
.
Component Inspection (ASCD Clutch Switch)
INFOID:0000000009947484
1.
CHECK ASCD CLUTCH SWITCH-I
1.
Turn ignition switch OFF.
2.
Disconnect ASCD clutch switch harness connector.
3.
Check the continuity between ASCD clutch switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ASCD CLUTCH SWITCH-II
1.
Adjust ASCD clutch switch installation. Refer to
BR-7, "Inspection and Adjustment"
2.
Check the continuity between ASCD clutch switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace ASCD clutch switch. Refer to
.
Component Inspection (Stop Lamp Switch)
INFOID:0000000009947485
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 under the following conditions.
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Existed
Slightly de-
pressed
Not existed
Terminals
Condition
Continuity
1 and 2
Clutch pedal
Fully released
Existed
Slightly de-
pressed
Not existed
Terminals
Condition
Continuity
1 and 2
Clutch pedal
Fully released
Existed
Slightly de-
pressed
Not existed
EC-360
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P1572 ASCD BRAKE SWITCH
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-7, "Inspection and Adjustment"
2.
Check the continuity between stop lamp switch terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace stop lamp switch. Refer to
.
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Not existed
Slightly de-
pressed
Existed
Terminals
Condition
Continuity
1 and 2
Brake pedal
Fully released
Not existed
Slightly de-
pressed
Existed
P1574 ASCD VEHICLE SPEED SENSOR
EC-361
< DTC/CIRCUIT DIAGNOSIS >
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P1574 ASCD VEHICLE SPEED SENSOR
Description
INFOID:0000000009947486
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
DTC Logic
INFOID:0000000009947487
DTC DETECTION LOGIC
NOTE:
• If DTC P1574 is displayed with DTC U1001, first perform the trouble diagnosis for DTC U1001. Refer
.
• If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer
EC-303, "M/T MODELS : DTC Logic"
• If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
• If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
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
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009947488
1.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
TM-98, "Diagnosis Description"
Is DTC detected?
NO
>> GO TO 2.
YES
>> Perform trouble shooting relevant to DTC indicated.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P1574
ASCD vehicle speed
sensor
ECM detects a difference between two vehicle
speed signals is out of the specified range.
• Harness or connectors
(The CAN communication line is open or
shorted.)
• ABS actuator and electric unit (control unit)
• TCM
• ECM
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