Infiniti G37 Coupe. Manual — part 1318
P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
TM-125
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
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P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Description
INFOID:0000000001672135
The revolution sensor detects the revolution of the parking gear and emits a pulse signal. The pulse signal is
transmitted to the TCM which converts it into vehicle speed.
DTC Logic
INFOID:0000000001672136
DTC DETECTION LOGIC
DTC COMFIRMATION PROCEDURE
CAUTION:
• Always drive vehicle at a safe speed.
• Be careful not to rev engine into the red zone on the tachometer.
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 REVOLUTION SENSOR AND VEHICLE SPEED SENSOR MTR
With CONSULT-III
1.
Start the engine.
2.
Select “DATA MONITOR”.
3.
Drive vehicle and check for an increase of “VHCL/S SE-A/T” value in response to “VHCL/S SE-MTR”
value.
Are “VHCL/S SE-A/T” and “VHCL/S SE-MTR” values correct?
YES
>> GO TO 2.
NO
>> Go to
2.
CHECK DTC DETECTION 1
With CONSULT-III
1.
Select “DATA MONITOR”.
2.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
With GST
DTC
Item
(CONSULT-III screen
terms)
A/T CHECK indicator
lamp judgment flicker
Diagnostic item is de-
tected when...
Possible cause
P0720
VEH SPD SEN/CIR AT
1st
• Signal from vehicle
speed sensor A/T
(revolution sensor) not
input due to cut line or
the like.
• Unexpected signal in-
put during running.
• After ignition switch is
turned ON, unexpect-
ed signal input from
vehicle speed sensor
MTR before the vehi-
cle starts moving.
• Harness or connectors
(Sensor circuit is open
or shorted.)
• Revolution sensor
• Vehicle speed sensor
MTR
VHCL/S SE-A/T
: Approximately matches the speedometer reading.
VHCL/S SE-MTR
: Approximately matches the speedometer reading.
VHCL/S SE-A/T
: 30 km/h (19 MPH) or more
ACCELE POSI
: More than 1.0/8
SLCT LVR POSI
: “D” position
Drive location
: Driving the vehicle uphill (increased engine load) will help maintain the driving condi-
tions required for this test.
TM-126
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Follow the procedure “With CONSULT-III”.
Is “P0720 VEH SPD SEN/CIR AT” detected?
YES
>> Go to
NO
>> GO TO 3.
3.
CHECK DTC DETECTION 2
With CONSULT-III
1.
Select “DATA MONITOR”.
2.
Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
With GST
Follow the procedure “With CONSULT-III”.
Is “P0720 VEH SPD SEN/CIR AT” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000001672137
1.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace damaged parts.
2.
CHECK SUB-HARNESS
1.
Remove control valve with TCM. Refer to
.
2.
Disconnect park/neutral position switch connector and TCM connector.
3.
Check continuity between park/neutral position switch connector terminals and TCM connector terminals.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check the following.
• Check terminals of park/neutral position switch connector and TCM connector, and harness cladding for
damage.
• Check connector for loose connection.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace damaged parts.
4.
REPLACE THE REVOLUTION SENSOR AND CHECK DTC
1.
Replace the revolution sensor. Refer to
.
2.
Perform “DTC CONFIRMATION PROCEDURE”. Refer to
.
ACCELE POSI
: More than 1.0/8
ENGINE SPEED
: 3,500 rpm or more
SLCT LVR POSI
: “D” position
Drive location
: Driving the vehicle uphill (increased engine load) will help maintain the driving condi-
tions required for this test.
Park/neutral position switch connector
TCM connector
Continuity
Connector
Terminal
Connector
Terminal
F154
8
F152
20
Existed
9
17
10
16
P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
TM-127
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
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Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace the control valve with TCM. Refer to
TM-128
< COMPONENT DIAGNOSIS >
[5AT: RE5R05A]
P0725 ENGINE SPEED SIGNAL
P0725 ENGINE SPEED SIGNAL
Description
INFOID:0000000001672138
The engine speed signal is transmitted from the ECM to the TCM with CAN communication line.
DTC Logic
INFOID:0000000001672139
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.
Start the engine.
2.
Select “DATA MONITOR”.
3.
Drive vehicle and maintain the following conditions for at least 10 consecutive seconds.
With GST
Follow the procedure “With CONSULT-III”.
Is “P0725 ENGINE SPEED SIG” detected?
YES
>> Go to
NO
>> Check intermittent incident. Refer to
GI-38, "Intermittent Incident"
.
Diagnosis Procedure
INFOID:0000000001672140
1.
CHECK DTC OF ECM
With CONSULT-III
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-120, "CONSULT-III Function"
2.
CHECK DTC OF TCM
With CONSULT-III
1.
Perform “SELF-DIAG RESULTS” mode for “TRANSMISSION”.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Check DTC detected item. Refer to
TM-112, "CONSULT-III Function (TRANSMISSION)"
3.
CHECK THE IGNITION SIGNAL CIRCUIT
1.
Start the engine.
DTC
Item
(CONSULT-III screen
terms)
A/T CHECK indicator
lamp judgment flicker
Diagnostic item is de-
tected when...
Possible cause
P0725
ENGINE SPEED SIG
16th
TCM does not receive
the CAN communication
signal from the ECM.
Harness or connectors
(ECM to TCM circuit is
open or shorted.)
VHCL/S SE-A/T
: 10 km/h (6 MPH) or more
ACCELE POSI
: More than 1.0/8
SLCT LVR POSI
: “D” position:
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