Infiniti M45 (Y34). Manual — part 58
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
AT-117
D
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AT
Wiring Diagram — AT — VSSA/T
ACS0047I
TCWA0112E
AT-118
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
TCM terminals and data are reference value. Measured between each terminal and ground.
Diagnostic Procedure
ACS0047J
1.
CHECK INPUT SIGNALS
With CONSULT-II
1.
Turn ignition switch ON. (Do not start engine.)
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 REVOLUTION SENSOR
With CONSULT-II
1.
Start the engine.
2.
Check the pulse when vehicle cruises.
OK or NG
OK
>> GO TO 6.
NG
>> GO TO 3.
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
12
Y/R
Power supply
(out)
IGN ON
–
Battery voltage
IGN OFF
–
0V
27
Y/B
Vehicle speed
sensor A/T (revo-
lution sensor)
When
vehicle
cruises
When running at 20 km/h (12MPH), use the CONSULT-II
pulse frequency measuring function.
185 (Hz)
Item name
Condition
Display value
VHCL/S SE·A/T
During driving
Approximately matches
the speedometer reading.
PCIA0033E
Condition
Connector
No.
Terminal No.
(Wire color)
Data
(Approx.)
When running at 20 km/h (12 MPH), use
the CONSULT-II pulse frequency mea-
suring function.
CAUTION:
Connect the data link connector to the
vehicle-side diagnosis connector.
F104
27 (Y/B)
185 (Hz)
PCIA0018E
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
AT-119
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3.
CHECK HARNESS BETWEEN TCM AND A/T UNIT ASSEMBLY HARNESS CONNECTOR
1.
Turn ignition switch OFF.
2.
Disconnect TCM connector.
3.
Check continuity between A/T unit assembly harness connector
and TCM connector.
4.
If OK, check harness for short to ground and short to power.
5.
Reinstall any part removed.
OK or NG
OK
>> GO TO 4.
NG
>> Repair open circuit or short to ground or short to power
in harness or connectors.
4.
CHECK TERMINAL CORD ASSEMBLY
1.
Remove oil pan. Refer to
AT-312, "Control Valve Assembly"
2.
Disconnect A/T unit assembly harness connector and control valve assembly harness connector.
3.
Check continuity between A/T unit assembly harness connector
and control valve assembly harness connector.
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
>> Repair open circuit or short to ground or short to power in harness or connectors.
Item
Connector No.
Terminal No.
(Wire color)
Continuity
TCM
F103
12 (Y/R)
Yes
A/T unit assembly harness
connector
F26
1 (Y/R)
TCM
F104
27 (Y/B)
Yes
A/T unit assembly harness
connector
F26
10 (Y/B)
SCIA3339E
Item
Connector No.
Terminal No.
(Wire color)
Continuity
A/T unit assembly har-
ness connector
F26
1 (B)
Yes
Control valve assem-
bly harness connector
F302
8 (B)
A/T unit assembly har-
ness connector
F26
10 (R/Y)
Yes
Control valve assem-
bly harness connector
F302
9 (R/Y)
SCIA3064E
AT-120
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
5.
DETECT MALFUNCTION ITEMS
1.
Check control valve assembly. Refer to
AT-312, "Control Valve Assembly"
2.
Disassemble A/T. Refer to
3.
Check revolution sensor. Refer to
.
OK or NG
OK
>> GO TO 6.
NG
>> Repair or replace damaged parts.
6.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-116, "DTC Confirmation Procedure"
.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 7.
7.
CHECK TCM
1.
Check TCM input/output signal. Refer to
AT-86, "TCM Input/Output Signal Reference Values"
.
2.
If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
>> INSPECTION END
NG
>> Repair or replace damaged parts.
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