Nissan Altima L32. Instruction — part 1458
TM-176
< COMPONENT DIAGNOSIS >
[CVT: RE0F09B]
P1722 ESTM VEHICLE SPEED SIGNAL
P1722 ESTM VEHICLE SPEED SIGNAL
Description
INFOID:0000000004201746
The vehicle speed signal is transmitted from ABS actuator and electric unit (control unit) to TCM by CAN com-
munication line.
DTC Logic
INFOID:0000000004201747
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
With CONSULT-III
1. Turn ignition switch ON.
2. Select “DATA MONITOR”.
3. Start engine and maintain the following conditions for at least 5 consecutive seconds.
Is “P1722 ESTM VEH SPD SIG” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000004201748
1.
CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
With CONSULT-III
Perform “SELF-DIAG RESULTS” mode for “ABS”.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Check DTC detected item. Refer to
(TCS/ABS),
(VDC/TCS/ABS).
2.
CHECK DTC WITH TCM
With CONSULT-III
Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is “P1722 ESTM VEH SPD SIG” detected?
YES
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING ITEMS
Check TCM connector pin terminals for damage or loose connection with harness connector.
DTC
Item
(CONSULT-III screen term)
Malfunction is detected when...
Possible cause
P1722
ESTM VEH SPD SIG
• CAN communication with the ABS actua-
tor and the electric unit (control unit) is
malfunctioning.
• There is a great difference between the
vehicle speed signal from the ABS actua-
tor and the electric unit (control unit), and
the vehicle speed sensor signal.
• Harness or connectors
(Sensor circuit is open or shorted.)
• ABS actuator and electric unit (control
unit)
ACC PEDAL OPEN
: 1.0/8 or less
VEHICLE SPEED
: 30 km/h (19 MPH) or more
P1722 ESTM VEHICLE SPEED SIGNAL
TM-177
< COMPONENT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
Is the inspection result normal?
YES
NO
>> Repair or replace damaged parts.
TM-178
< COMPONENT DIAGNOSIS >
[CVT: RE0F09B]
P1723 CVT SPEED SENSOR FUNCTION
P1723 CVT SPEED SENSOR FUNCTION
Description
INFOID:0000000004201749
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 sig-
nal to the TCM.
DTC Logic
INFOID:0000000004201750
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
With CONSULT-III
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
NO
>> Check intermittent incident. Refer to
GI-42, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000004201751
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
.
NO
>> GO TO 2.
2.
CHECK OUTPUT SPEED SENSOR (SECONDARY SPEED SENSOR) SYSTEM
Check output speed sensor (secondary speed sensor) system. Refer to
.
Is the inspection result normal?
DTC
Item
(CONSULT-III screen term)
Malfunction is detected when...
Possible cause
P1723
CVT SPD SEN/FNCTN
A rotation sensor error is detected because
the gear does not change in accordance
with the position of the stepping motor.
CAUTION:
One of the “P0720 VEH SPD SEN/CIR
AT”, the “P0715 INPUT SPD SEN/CIRC”
or the “P0725 ENGINE SPEED SIG“ is
displayed with the DTC at the same time.
• Harness or connectors
(Sensor circuit is open or shorted.)
• Output speed sensor (secondary speed
sensor)
• Input speed sensor (primary speed sen-
sor)
• Engine speed signal system
VEHICLE SPEED
: 10 km/h (6 MPH) or more
ACC PEDAL OPEN
: More than 1.0/8
RANGE
: “D” position
ENG SPEED
: 450 rpm or more
Driving location
: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
P1723 CVT SPEED SENSOR FUNCTION
TM-179
< COMPONENT DIAGNOSIS >
[CVT: RE0F09B]
C
E
F
G
H
I
J
K
L
M
A
B
TM
N
O
P
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
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
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
NO
>> Repair or replace damaged parts.
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