Infiniti Q45 (FY33). Manual — part 34
SAT341H
Shift Solenoid Valve B
DESCRIPTION
Shift solenoid valves A and B are turned “ON” or “OFF” by the TCM
in response to signals sent from the PNP switch, vehicle speed and
throttle position sensors. Gears will then be shifted to the optimum
position.
Gear position
1
2
3
4
Shift solenoid valve A
ON (Closed)
OFF (Open)
OFF (Open)
ON (Closed)
Shift solenoid valve B
ON (Closed)
ON (Closed)
OFF (Open)
OFF (Open)
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
7
LG/B
Shift solenoid
valve B
When shift solenoid valve B oper-
ates.
(When driving in “D
1
” or “D
2
”.)
Battery voltage
When shift solenoid valve B does
not operate.
(When driving in “D
3
” or “D
4
”.)
0V
ON BOARD DIAGNOSIS LOGIC
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: SFT SOL B/CIRC
TCM detects an improper voltage drop
when it tries to operate the solenoid
valve.
I
Harness or connectors
(The solenoid circuit is open or
shorted.)
I
Shift solenoid valve B
: P0755
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0755
AT-133
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.
3)
Drive vehicle in “D” position and allow the transmission
to shift 1
,
2
,
3 (“GEAR”).
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ OR ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Follow the procedure “With CONSULT-II”.
TROUBLE DIAGNOSIS FOR DTC P0755
Shift Solenoid Valve B (Cont’d)
AT-134
SAT555I
SAT390J
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
2
and ground.
Resistance: 20 - 40
Ω
OK
E
NG
1. Remove control valve
assembly. Refer to
AT-195.
2. Check the following
items:
I
Shift solenoid valve B
Refer to “Component
Inspection”, AT-135.
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
2
and TCM harness connector terminal
q
7
.
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-134.
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
SAT535I
COMPONENT INSPECTION
Shift solenoid valve B
I
For removal, refer to AT-195.
Resistance check
I
Check resistance between two terminals.
Solenoid valve
Terminal No.
Resistance
(Approx.)
Shift solenoid
valve B
q
2
Ground
20 - 40
Ω
GI
MA
EM
LC
EC
FE
PD
FA
RA
BR
ST
RS
BT
HA
EL
IDX
TROUBLE DIAGNOSIS FOR DTC P0755
Shift Solenoid Valve B (Cont’d)
H
H
H
H
AT-135
SAT534I
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 P0755
Shift Solenoid Valve B (Cont’d)
AT-136
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