Nissan Altima 2007-2012 Service Manual: P0725 engine speed signal
Description
The engine speed signal is sent from the ECM to the TCM by CAN communication line.
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 10 consecutive seconds.
PRI SPEED SEN : More than 1000 rpm
Is “P0725 ENGINE SPEED SIG” detected? YES >> Go to TM-142, "Diagnosis Procedure".
NO >> Check intermittent incident. Refer to GI-42, "Intermittent Incident".
Diagnosis Procedure
1.CHECK DTC WITH ECM
1. Turn ignition switch ON.
2. Perform “SELF-DIAG RESULTS” mode for “ENGINE”.
Is the inspection result normal? YES >> GO TO 2.
NO >> Check DTC detected item. Refer to EC-1555, "DTC Index".
2.CHECK DTC WITH TCM
Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P0725 ENGINE SPEED SIG” detected? YES >> Replace TCM. Refer to TM-254, "Exploded View".
NO >> GO TO 3.
3.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-254, "Exploded View".
NO >> Repair or replace damaged parts.
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 sent to the TCM ...
P0730 belt damage
Description
TCM selects the gear ratio using the engine load (throttle position), the
primary pulley revolution speed, and
the secondary pulley revolution speed as input signal. Then it changes t ...
Other materials:
Intake manifold
Removal and Installation
1. Intake manifold
2. Gasket
A. Follow installation procedure
REMOVAL
WARNING:
To avoid the danger of being scalded, never drain the coolant when the engine is
hot.
1. Remove the engine cover with power tool.
2. Release the fuel pressure. Refer to EC-1579, &quo ...
Common item
Diagnosis Description
BCM CONSULT-III FUNCTION
CONSULT-III performs the following functions via CAN communication with BCM.
SYSTEM APPLICATION
BCM can perform the following functions for each system.
NOTE:
It can perform the diagnosis modes except the following for all sub system
...
List of voice commands
When you press and release the
button on
the steering wheel, you can choose from the
commands on the Main Menu. The following
pages describe these commands and the commands
in each sub-menu.
Remember to wait for the tone before
speaking.
After the main menu, you can say “Help” to h ...