Infiniti Q45 (FY33). Manual — part 37
SAT563I
SAT391J
DIAGNOSTIC PROCEDURE
INSPECTION START
CHECK GROUND CIRCUIT.
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 terminal
q
4
and ground.
Resistance: 20 - 40
Ω
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-195.
2. Check the following
items:
I
Overrun clutch solenoid
valve
Refer to “Component
Inspection”, AT-145.
I
Harness of terminal cord
assembly for short or
open
CHECK POWER SOURCE CIRCUIT.
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check continuity between terminal
q
4
and TCM harness connector terminal
q
8
.
Continuity should exist.
If OK, check harness for short to
ground and short to power.
4. Reinstall any part removed.
OK
E
NG
Repair open circuit or short
to ground or short to power
in harness or connectors.
Perform DIAGNOSTIC TROUBLE CODE
(DTC) CONFIRMATION PROCEDURE,
AT-144.
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
SAT392J
COMPONENT INSPECTION
Overrun clutch solenoid valve
I
For removal, refer to AT-195.
Resistance check
I
Check resistance between two terminals.
Solenoid valve
Terminal No.
Resistance
(Approx.)
Overrun clutch
solenoid valve
q
4
Ground
20 - 40
Ω
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P1760
Overrun Clutch Solenoid Valve (Cont’d)
H
H
H
H
AT-145
SAT567I
Operation check
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal and ground.
TROUBLE DIAGNOSIS FOR DTC P1760
Overrun Clutch Solenoid Valve (Cont’d)
AT-146
SAT342HA
A/T Fluid Temperature Sensor Circuit and TCM
Power Source
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.)
4
G/B
Power source
When turning ignition switch to “ON”. Battery voltage
When turning ignition switch to
“OFF”.
0V
9
G/B
Power source
Same as No. 4
23
Y
Power source
(Memory back-
up)
or
When turning ignition switch to
“OFF”.
Battery voltage
When turning ignition switch to “ON”. Battery voltage
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
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
AT-147
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: BATT/FLUID TEMP SEN
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
: 8th judgement flicker
SAT014K
SAT971J
SAT523I
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMA-
TION PROCEDURE
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
1)
Start engine.
2)
Select “DATA MONITOR” mode for “A/T” with CON-
SULT-II.
3)
Drive vehicle under the following conditions:
Selector lever in “D”, vehicle speed higher than 20 km/h
(12 MPH).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1)
Start engine.
2)
Drive vehicle under the following conditions:
Selector lever in “D”, vehicle speed higher than 20 km/h
(12 MPH).
3)
Perform self-diagnosis.
Refer to TCM SELF-DIAGNOSTIC PROCEDURE (No
Tools), AT-49.
TROUBLE DIAGNOSIS FOR BATT/FLUID TEMP SEN
A/T Fluid Temperature Sensor Circuit and TCM
Power Source (Cont’d)
AT-148
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