Infiniti QX4 (R50). Manual — part 43
Wiring Diagram — AT — SSV/A
NBAT0197
MAT738A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0750 SHIFT SOLENOID VALVE A
Wiring Diagram — AT — SSV/A
AT-169
Diagnostic Procedure
NBAT0061
1
CHECK VALVE RESISTANCE
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector on the right side of transfer assembly.
3. Check resistance between terminal 3 and ground.
SAT164J
Is resistance approx. 20 - 40
Ω
?
Yes
©
GO TO 3.
No
©
GO TO 2.
2
CHECK VALVE OPERATION
1. Remove control valve assembly.
Refer to AT-273.
2. Check the following items:
I
Shift solenoid valve A
Refer to “Component Inspection”, AT-171.
I
Harness of terminal cord assembly for short or open
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace damaged parts.
3
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 3 and TCM harness connector terminal 11. Refer to wiring diagram — AT —
SSV/A.
Continuity should exist.
If OK, check harness for short to ground and short to power.
4. 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 DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-168.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 5.
DTC P0750 SHIFT SOLENOID VALVE A
Diagnostic Procedure
AT-170
5
CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
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.
SAT654I
Component Inspection
NBAT0062
SHIFT SOLENOID VALVE A
NBAT0062S01
I
For removal, refer to AT-273.
Resistance Check
NBAT0062S0101
I
Check resistance between terminal 3 and ground.
Solenoid valve
Terminal No.
Resistance (Approx.)
Shift solenoid valve A
3
Ground
20 - 40
Ω
SAT653I
Operation Check
NBAT0062S0102
I
Check solenoid valve by listening for its operating sound while
applying battery voltage to the terminal 3 and ground.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0750 SHIFT SOLENOID VALVE A
Diagnostic Procedure (Cont’d)
AT-171
SAT341H
Description
NBAT0063
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
NBAT0063S02
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
12
L/R
Shift solenoid
valve B
When shift solenoid valve B operates.
(When driving in “D
1
” or “D
2
”.)
Battery volt-
age
When shift solenoid valve B does not operate.
(When driving in “D
3
” or “D
4
”.)
0V
ON BOARD DIAGNOSIS LOGIC
NBAT0063S03
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: SFT SOL B/CIRC
TCM detects an improper voltage drop
when it tires to operate the solenoid
valve.
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Shift solenoid valve B
: P0755
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0063S01
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.
With CONSULT-II
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
for “ENGINE” with CONSULT-II.
2)
Drive vehicle in “D” position and allow the transmission to shift
1
,
2
,
3 (“GEAR”).
With GST
Follow the procedure “With CONSULT-II”.
DTC P0755 SHIFT SOLENOID VALVE B
Description
AT-172
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