Nissan Altima 2007-2012 Service Manual: P0720 vehicle speed sensor cvt (secondary speed sensor)
Description
The vehicle speed sensor CVT [output speed sensor (secondary speed sensor)] detects the revolution of the CVT output shaft and emits a pulse signal. The pulse signal is transmitted to the TCM, which converts it into vehicle speed.
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 12 consecutive seconds.
Follow the procedure “With CONSULT-III”.
Is “P0720 VEH SPD SEN/CIR AT” detected? YES >> Go to TM-318, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR)
1. Start engine.
2. Check voltage between TCM harness connector F16 terminal 7, 46 and 7, 48.
3. If OK, check pulse when vehicle cruises.
Is the inspection result normal? YES >> GO TO 11.
NO >> GO TO 2.
2.CHECK POWER AND SENSOR GROUND
1. Turn ignition switch OFF.
2. Disconnect output speed sensor (secondary speed sensor) harness connector.
3. Turn ignition switch ON.
4. Check voltage between output speed sensor (secondary speed sensor) harness connector F23 terminal 1 and 3.
5. Check voltage between output speed sensor (secondary speed sensor) harness connector F23 terminal 3 and ground.
Is the inspection result normal? YES >> GO TO 3.
NO-1 >> Battery voltage is not supplied between terminals 1 and 3, terminals 3 and ground: GO TO 6.
NO-2 >> Battery voltage is not supplied between terminals 1 and 3 only: GO TO 8.
3.CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (SENSOR GROUND)
1. Turn ignition switch OFF.
2. Disconnect TCM harness connector.
3. Check continuity between TCM harness connector F16 terminal 7 and ground.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace damaged parts.
4.CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (PART 1)
Check continuity between TCM harness connector F16 (A) terminal 34 and output speed sensor (secondary speed sensor) harness connector F23 (B) terminal 2.
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair or replace damaged parts.
5.CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (PART 2)
Check continuity between TCM harness connector F16 terminal 34 and ground.
Is the inspection result normal? YES >> GO TO 10.
NO >> Repair or replace damaged parts.
6.CHECK HARNESS BETWEEN IPDM E/R AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (POWER) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R connector F10.
3. Check continuity between IPDM E/R harness connector F10 (A) terminal58 and output speed sensor (secondary speed sensor) harness connector F23 (B) terminal 3.
Is the inspection result normal? YES >> GO TO 7.
NO >> Repair or replace damaged parts.
7.CHECK HARNESS BETWEEN IPDM E/R AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (POWER) (PART 2)
Check continuity between IPDM E/R harness connector F10 terminal 58 and ground.
Is the inspection result normal? YES >> Check the following.
• Harness for short or open between ignition switch and IPDM E/R
• 10A fuse (No. 34, located in IPDM E/R) • Ignition switch
NO >> Repair or replace damaged parts.
8.CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (SENSOR GROUND) (PART 1)
1. Turn ignition switch OFF.
2. Disconnect TCM connector.
3. Check continuity between TCM harness connector F16 (A) terminal 7 and output speed sensor (secondary speed sensor) harness connector F23 (B) terminal 1.
Is the inspection result normal? YES >> GO TO 9.
NO >> Repair or replace damaged parts.
9.CHECK HARNESS BETWEEN TCM AND OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) (SENSOR GROUND) (PART 2)
Check continuity between TCM harness connector F16 terminal 7 and ground.
Is the inspection result normal? YES >> GO TO 10.
NO >> Repair or replace damaged parts.
10.CHECK TCM
1. Replace same type TCM. Refer to TM-430, "Exploded View".
2. Connect each connector.
3. Perform “DTC CONFIRMATION PROCEDURE”. Refer to TM-318, "DTC Logic".
Is “P0720 VEH SPD SEN/CIR AT” detected? YES >> Replace output speed sensor (secondary speed sensor). Refer to TM-438, "Removal and Installation".
NO >> Replace TCM. Refer to TM-430, "Exploded View".
11.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.
P0715 input speed sensor (pri speed
sensor)
Description
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 ...
P0725 engine speed signal
Description
The engine speed signal is transmitted from ECM to TCM by CAN communication
line.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a saf ...
Other materials:
Normal operating condition
Description
XENON HEADLAMP
• The brightness and color of the light may vary slightly immediately after
turning the headlamp ON. This condition
will remain until the xenon bulb becomes stable. This is normal.
• Illumination time lag may occur between right and left. This is normal.
AUTO ...
Power window main switch
Reference Value
TERMINAL LAYOUT
PHYSICAL VALUES
MAIN POWER WINDOW AND DOOR LOCK/UNLOCK SWITCH
Wiring Diagram
Fail Safe
FAIL-SAFE CONTROL
Switches to fail-safe control when malfunction is detected in encoder signal
that detects up/down speed and
direction of door glass ...
P0550 PSP Sensor
Description
Power steering pressure (PSP) sensor is installed to the power steering
high-pressure tube and detects a
power steering load.
This sensor is a potentiometer which transforms the power steering load into
output voltage, and emits the
voltage signal to the ECM. The ECM controls ...