Nissan Altima 2007-2012 Service Manual: 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 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-322, "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-527, "DTC Index" (for California), EC-1015, "DTC Index" (except for California).
2.CHECK DTC WITH TCM
Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P0725 ENGINE SPEED SIG” detected? YES >> Replace TCM. Refer to TM-430, "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-430, "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 transmitted to ...
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 th ...
Other materials:
B2098 ignition relay on stuck
Description
• IPDM E/R operates the ignition relay when it receives an ignition switch ON
signal from BCM via CAN communication.
• Turn the ignition relay OFF by pressing the push-button ignition switch once
when the vehicle speed is 4 km/
h (2.5 MPH) or less.
• Turn the ignition ...
How to use the touch screen
CAUTION
● The glass display screen may break if it
is hit with a hard or sharp object. If the
glass screen breaks, do not touch it.
Doing so could result in an injury.
● To clean the display, never use a rough
cloth, alcohol, benzine, thinner or any
kind of solvent or paper towe ...
Diagnosis sensor unit
Removal and Installation
REMOVAL
1. Diagnosis sensor unit harness connector
2. Diagnosis sensor unit shield
3. Diagnosis sensor unit
A. Diagnosis sensor unit bolts
CAUTION:
• Before servicing, turn ignition switch OFF, disconnect both battery terminals
and wait at least three
minutes ...