Nissan Altima 2007-2012 Service Manual: P1723 cvt speed sensor function
Description
The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)] detects the revolution of parking gear and generates a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle speed.
The input speed sensor (primary speed sensor) detects the primary pulley revolution speed and sends a signal to the TCM.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION: Always drive vehicle at a safe speed. NOTE: If “DTC CONFIRMATION PROCEDURE” has been previously performed, always turn ignition switch OFF.
Then wait at least 10 seconds before performing the next test.
1.CHECK DTC DETECTION
1. Turn ignition switch ON.
2. Select “DATA MONITOR”.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds.
Is “P1723 CVT SPD SEN/FNCTN” detected? YES >> Go to TM-355, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK STEP MOTOR FUNCTION
Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P1778 STEP MOTR/FNC” detected? YES >> Repair or replace damaged parts. Refer to TM-364, "DTC Logic".
NO >> GO TO 2.
2.CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system. Refer to TM-318, "DTC Logic".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair or replace damaged parts.
3.CHECK INPUT SPEED SENSOR (PRIMARY SPEED SENSOR) SYSTEM
Check input speed sensor (primary speed sensor) system. Refer to TM-313, "DTC Logic".
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK ENGINE SPEED SIGNAL SYSTEM
Check engine speed signal system. Refer to TM-322, "DTC Logic".
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
Is the inspection result normal? YES >> Replace TCM. Refer to TM-430, "Exploded View".
NO >> Repair or replace damaged parts.
P1722 estm vehicle speed signal
Description
The vehicle speed signal is transmitted from ABS actuator and electric unit
(control unit) to TCM by CAN communication
line.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCE ...
P1726 electric throttle control system
Description
Electric throttle control actuator consists of throttle control motor,
accelerator pedal position sensor, throttle
position sensor etc. The actuator sends a signal to the ECM, and ECM ...
Other materials:
Clutch fluid
Air Bleeding Procedure
CAUTION:
Do not spill clutch fluid onto painted surfaces. If it spills, wipe up
immediately and wash the affected
area with water.
NOTE:
• Do not use a vacuum assist or any other type of power bleeder on this system.
Use of vacuum assist or
power bleeder will not p ...
BCM branch line circuit
Diagnosis Procedure
INSPECTION PROCEDURE
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the BCM for damage, bend and loose
connection (unit side and
connector side).
Is the inspec ...
U1210 DVD-ROM seek
Description
Refer to AV-240, "System Description".
DTC Logic
DTC DETECTION LOGIC
Diagnosis Procedure
1.CHECK DVD-ROM
Check DVD-ROM for dirt, scratches and warpage.
Is the DVD-ROM clean and undamaged?
YES >> Replace AV control unit. Refer to AV-437, "Removal and I ...