Infiniti G35 (V35). Manual — part 31
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
AT-115
D
E
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A
B
AT
Diagnostic Procedure
NCS000D3
1.
CHECK INPUT SIGNAL
With CONSULT-II
1.
Turn ignition switch ON.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
Start the engine.
4.
Read out the value of “VHCL/S SE-A/T” while driving.
Check the value changes according to driving speed.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 2.
2.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace damaged parts.
3.
DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> GO TO 4.
NG
>> Repair or replace damaged parts.
Item name
Condition
Display value
VHCL/S SE-A/T
During driving
Approximately matches
the speedometer reading.
SCIA2148E
AT-116
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
4.
CHECK SUB-HARNESS
1.
Remove control valve with TCM. Refer to
AT-225, "Control Valve with TCM and A/T Fluid Temperature
2.
Disconnect park/neutral position switch connector and TCM connector.
3.
Check continuity between park/neutral position switch connector
terminals and TCM connector terminals.
4.
If OK, check harness for short to ground and short to power.
5.
Reinstall any part removed.
OK or NG
OK
>> GO TO 5.
NG
>> Replace open circuit or short to ground and short to power in harness or connectors.
5.
REPLACE REVOLUTION SENSOR AND CHECK DTC
1.
Replace revolution sensor. Refer to
2.
Perform “DTC Confirmation Procedure”. Refer to
AT-112, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> Replace the control valve with TCM. Refer to
AT-225, "Control Valve with TCM and A/T Fluid Tem-
6.
CHECK DTC
Perform
AT-112, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
Item
Connector
Terminal
Continuity
Park/neutral position switch
connector
F505
8
Yes
TCM connector
F503
20
Park/neutral position switch
connector
F505
9
Yes
TCM connector
F503
17
Park/neutral position switch
connector
F505
10
Yes
TCM connector
F503
16
SCIA5458E
DTC P0725 ENGINE SPEED SIGNAL
AT-117
D
E
F
G
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A
B
AT
DTC P0725 ENGINE SPEED SIGNAL
PFP:24825
Description
NCS000D4
The engine speed signal is sent from the ECM to the TCM.
CONSULT-II Reference Value
NCS000D5
On Board Diagnosis Logic
NCS000D6
●
This is an OBD-II self-diagnostic item.
●
Diagnostic trouble code “P0725 ENGINE SPEED SIG” with CONSULT-II or 16th judgment flicker without
CONSULT-II is detected when TCM does not receive the ignition signal from ECM during engine cranking
or running.
Possible Cause
NCS000D7
Harness or connectors.
(ECM to TCM circuit is open or shorted.)
DTC Confirmation Procedure
NCS000D8
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch OFF and
wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II and check monitor “VHCL/S SE-A/T”,
“ACCELE POSI” and “SLCT LVR POSI”.
3.
Touch “START”.
4.
Start engine and maintain the following conditions for at least 10
consecutive seconds.
VHCL/S SE-A/T: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1.0/8
SLCT LVR POSI: “D” position
5.
AT-118, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II”.
Item name
Condition
Display value
ENGINE SPEED
Engine running
Closely matches the tachometer reading.
BCIA0031E
AT-118
DTC P0725 ENGINE SPEED SIGNAL
Diagnostic Procedure
NCS000D9
1.
CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to
AT-86, "SELF-DIAGNOSTIC RESULT MODE"
,
Is a malfunction in the CAN communication indicated in the results?
YES
>> Check CAN communication line. Refer to
AT-98, "DTC U1000 CAN COMMUNICATION LINE"
NO
>> GO TO 2.
2.
CHECK DTC WITH TCM
With CONSULT-II
1.
Start engine.
2.
Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3.
While monitoring engine speed, check for engine speed change
corresponding to wide-open throttle position signal.
OK or NG
OK
>> GO TO 3.
NG
>> Check the ignition signal circuit. Refer to
3.
CHECK DTC
Perform
AT-117, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 4.
4.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to
AT-172, "MAIN POWER SUPPLY AND GROUND CIR-
OK or NG
OK
>> GO TO 5.
NG
>> Repair or replace damaged parts.
5.
DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> Replace control valve with TCM. Refer to
AT-225, "Control Valve with TCM and A/T Fluid Temper-
NG
>> Repair or replace damaged parts.
Item name
Condition
Display value
ENGINE SPEED
Engine running
Closely matches the tachometer
reading.
PCIA0041E
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