Nissan Rogue Service Manual: P1574 ASCD vehicle speed sensor
Description
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combination meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD control. Refer to EC-47, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : System Description" for ASCD functions.
DTC Description
DTC DETECTION LOGIC
| 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. |
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 EC-93, "DTC Index".
NO >> GO TO 2.
2.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.
- Turn ignition switch OFF and wait at least 10 seconds.
- Turn ignition switch ON.
- Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 3.
3.PERFORM DTC CONFIRMATION PROCEDURE
- Start engine.
- 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.
- Check DTC.
Is DTC detected? YES >> Proceed to EC-415, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis 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 EC-93, "DTC Index".
NO >> GO TO 2.
2.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-47, "CONSULT Function".
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 BRC-44, "CONSULT Function".
Is DTC detected? NO >> INSPECTION END
YES >> Perform trouble shooting relevant to DTC indicated.
P1572 brake pedal position switch
DTC Description
DTC DETECTION LOGIC
NOTE:
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 an ...
P1715 input speed sensor
Description
ECM receives input speed sensor signal from TCM through CAN communication
line. ECM uses this signal for
engine control.
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSUL ...
Other materials:
P2119 electric throttle control actuator
DTC Description
DTC DETECTION LOGIC
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P2119
ETC ACTR-B1
(Throttle actuator control throttle body
range/performance)
A
Electric throttle control actuator does not function properly ...
Unit disassembly and assembly
ELECTRIC CONTROLLED COUPLING
Exploded View
Stud bolt
Connector bracket
Reamer bolt
Electric controlled coupling assembly
Wave spring
Drive pinion oil seal
Drive pinion lock nut
Pinion front bearing
Gear carrier
Collapsible spacer
Drive pinion adjusting shim
Pini ...
C1604 torque sensor
DTC Logic
DTC DETECTION LOGIC
DTC
Display item
Malfunction detected condition
Possible cause
C1604
TORQUE SENSOR
When torque sensor output signal is malfunctioning.
Harness or connector
Torque sensor
EPS control unit
...