Infiniti I30 (A33). Manual — part 43
Diagnostic Procedure
NHAT0066
1
CHECK VALVE RESISTANCE
1. Turn ignition switch to OFF position.
2. Disconnect terminal cord assembly connector in engine compartment.
3. Check resistance between terminal 4 and ground.
SAT630J
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
CHECK VALVE OPERATION
1. Remove control valve assembly. Refer to AT-280.
2. Check the following items:
I
Line pressure solenoid valve
i. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.
SAT038K
I
Harness of terminal cord assembly for short or open
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace damaged parts.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0745 LINE PRESSURE SOLENOID VALVE
Diagnostic Procedure
AT-169
3
CHECK POWER SOURCE AND DROPPING RESISTOR CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check resistance between terminal 4 and TCM harness connector terminal 2.
SAT631JB
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING ITEM
Check the following items:
I
Dropping resistor
I
Check resistance between two terminals.
SAT933IB
Resistance:
10 - 15
Ω
I
Harness for short or open between TCM terminal 2 and terminal cord assembly (Main harness)
OK or NG
OK
©
GO TO 5.
NG
©
Repair or replace damaged parts.
5
CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.
2. Check continuity between sub-harness connector terminal 4 and TCM harness connector terminal 1. Refer to wiring
diagram — AT — LPSV.
Continuity should exist.
If OK, check harness for short to ground and short to power.
3. Reinstall any part removed.
OK or NG
OK
©
GO TO 6.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
DTC P0745 LINE PRESSURE SOLENOID VALVE
Diagnostic Procedure (Cont’d)
AT-170
6
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-167.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 7.
7
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.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0745 LINE PRESSURE SOLENOID VALVE
Diagnostic Procedure (Cont’d)
AT-171
SAT283HB
Description
NHAT0067
Shift solenoid valves A and B are turned ON or OFF by the TCM
in response to signals sent from the park/neutral position (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
NHAT0067S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
11
R/Y
Shift solenoid
valve A
When shift solenoid valve A operates.
(When driving in D
1
or D
4
.)
Battery volt-
age
When shift solenoid valve A does not oper-
ate.
(When driving in D
2
or D
3
.)
0V
On Board Diagnosis Logic
NHAT0234
Diagnostic trouble code SFT SOL A/CIRC with CONSULT-II or
P0750 without CONSULT-II is detected when TCM detects an
improper voltage drop when it tries to operate the solenoid valve.
Possible Cause
NHAT0235
Check the following items.
I
Harness or connectors
(The solenoid circuit is open or shorted.)
I
Shift solenoid valve A
DTC P0750 SHIFT SOLENOID VALVE A
Description
AT-172
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