Nissan Altima 2007-2012 Service Manual: P1574 ASCD Vehicle speed sensor
Description
The ECM receives two vehicle speed signals via the 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-1090, "System Diagram" for ASCD functions.
DTC Logic
DTC DETECTION LOGIC
NOTE: • If DTC P1574 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
Refer to EC-1179, "DTC Logic".
• If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer to EC-1365, "DTC Logic".
• If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer to EC-1376, "DTC Logic".
• If DTC P1574 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer to EC-1378, "DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following 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 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine (ESP switch OFF).
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 EC-1421, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis Procedure
1.CHECK DTC WITH TCM
Check DTC with TCM. Refer to TM-117, "Diagnosis Description".
Is the inspection result normal? YES >> GO TO 2.
NO >> Perform trouble shooting relevant to DTC indicated.
2.CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Refer to BRC-223, "DTC No. Index".
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace malfunctioning part.
3.CHECK COMBINATION METER FUNCTION
Refer to MWI-95, "DTC Index".
>> INSPECTION END
P1572 ASCD Brake switch
Description When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON. ECM detects the state of the brake pedal by those two types of input (ON/OFF s ...P1700 CVT Control system
Description This DTC is displayed with other DTC regarding TCM. Perform the trouble diagnosis for corresponding DTC. Refer to EC-1555, "DTC Index". When this DTC is detected, the ASCD ...Other materials:
Connecting procedure
NOTE:
The connecting procedure must be performed
when the vehicle is stationary. If the
vehicle starts moving during the procedure,
the procedure will be cancelled.
To connect a phone to the Bluetooth® Hands-
Free Phone System:
1. Press the SETTING button.
2. Use the TUNE/FOLDER knob to s ...
P1564 ASCD Steering switch
Description
ASCD steering switch has variant values of electrical resistance for each
button. ECM reads voltage variation
of switch, and determines which button is operated.
Refer to EC-603, "System Description" for the ASCD function.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC ...
Passenger side
Description
Door glass moves UP/DOWN by receiving the signal from main power window and
door lock/unlock switch or
power window and door lock/unlock switch RH.
Component Function Check
1. CHECK FRONT POWER WINDOW MOTOR RH CIRCIUT
Does power window motor RH operate with main power windo ...