Infiniti Q45 (FY33). Manual — part 22
SAT342HA
A/T Fluid Temperature Sensor
DESCRIPTION
The A/T fluid temperature sensor detects the A/T fluid temperature
and sends a signal to the TCM.
SAT021J
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
Monitor item
Condition
Specification
A/T fluid temperature sensor
Cold [20°C (68°F)]
"
Hot [80°C (176°F)]
Approximately 1.5V
"
Approximately 0.5V
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
33
G
A/T fluid tem-
perature sensor
When ATF temperature is 20°C
(68°F).
1.5V
When ATF temperature is 80°C
(176°F).
0.5V
35
B
Throttle position
sensor
(Ground)
—
0V
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: ATF TEMP SEN/CIRC
TCM receives an excessively low or
high voltage from the sensor.
I
Harness or connectors
(The sensor circuit is open or
shorted.)
I
A/T fluid temperature sensor
: P0710
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0710
AT-85
SAT014K
SEF949Y
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMA-
TION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1)
Turn ignition switch “ON” and select “DATA MONITOR”
mode for “ENGINE” with CONSULT-II.
2)
Start engine and maintain the following conditions for at
least 10 minutes (Total). (It is not necessary to maintain
continuously.)
CMPS
⋅
RPM (REF): 450 rpm or more
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD “ON”)
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Follow the procedure “With CONSULT-II”.
TROUBLE DIAGNOSIS FOR DTC P0710
A/T Fluid Temperature Sensor (Cont’d)
AT-86
SAT525I
SAT738J
SAT913IA
SAT914I
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK A/T FLUID TEMPERATURE
SENSOR WITH TERMINAL CORD
ASSEMBLY.
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly con-
nector at the end of A/T assembly.
3. Check resistance between terminals
q
8
and
q
9
when A/T is cold.
Resistance:
Cold [20°C (68°F)]
Approximately 2.5 k
Ω
4. Reinstall any part removed.
OK
E
NG
1. Remove oil pan.
2. Check the following
items:
I
A/T fluid temperature
sensor
Refer to “Component
Inspection”, AT-88.
I
Harness of terminal cord
assembly for short or
open
CHECK INPUT SIGNAL OF A/T FLUID
TEMPERATURE SENSOR.
1. Start engine.
2. Select “TCM INPUT SIGNALS”
in “DATA MONITOR” mode for
“A/T” with CONSULT-II.
3. Read out the value of “FLUID
TEMP SE”.
Voltage:
Cold [20°C (68°F)]
→
Hot [80°C (176°F)]:
Approximately
1.5V
→
0.5V
-------------------------------------------------------------------------------------------------------------------------------------- OR --------------------------------------------------------------------------------------------------------------------------------------
1. Start engine.
2. Check voltage between TCM
terminal
q
33
and ground while
warming up A/T.
Voltage:
Cold [20°C (68°F)]
→
Hot [80°C (176°F)]:
Approximately
1.5V
→
0.5V
3. Turn ignition switch to “OFF”
position.
4. Disconnect TCM harness con-
nector.
5. Check continuity between termi-
nal
q
35
and ground.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
OK
E
NG
Check the following item:
I
Harness for short to
ground or short to power
or open between TCM,
ECM and terminal cord
assembly (Main harness)
I
Ground circuit for ECM
Refer to EC section
(“TROUBLE DIAGNOSIS
FOR POWER SUPPLY”).
Perform DIAGNOSTIC TROUBLE CODE
(DTC) CONFIRMATION PROCEDURE,
AT-86.
OK
E
NG
1. Perform TCM input/
output signal inspection.
2. If NG, recheck TCM pin
terminals for damage or
loose connection with
harness connector.
INSPECTION END
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0710
A/T Fluid Temperature Sensor (Cont’d)
H
H
H
H
AT-87
SAT527I
COMPONENT INSPECTION
A/T fluid temperature sensor
I
For removal, refer to AT-195.
I
Check resistance between terminals
q
8
and
q
9
while chang-
ing temperature as shown at left.
Temperature °C (°F)
Resistance
20 (68)
Approximately 2.5 k
Ω
80 (176)
Approximately 0.3 k
Ω
TROUBLE DIAGNOSIS FOR DTC P0710
A/T Fluid Temperature Sensor (Cont’d)
AT-88
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