Infiniti M45 (Y34). Manual — part 71
DTC P1730 A/T INTERLOCK
AT-169
D
E
F
G
H
I
J
K
L
M
A
B
AT
TCWA0122E
AT-170
DTC P1730 A/T INTERLOCK
TCM terminals and data are reference value. Measured between each terminal and ground.
TCWA0123E
DTC P1730 A/T INTERLOCK
AT-171
D
E
F
G
H
I
J
K
L
M
A
B
AT
Terminal
No.
Wire
color
Item
Condition
Data (Approx.)
4
P/L
SEL3 (ATF pres-
sure switch 3)
–
–
–
10
R/W
Input clutch sole-
noid valve
When
vehicle
cruises
When the solenoid valve operating (in 1st gear, 2nd gear,
or 3rd gear)
More than 2.0V
When the solenoid valve is not operating (4th gear or 5th
gear)
0V
11
R/L
High and low
reverse clutch
solenoid valve
When the solenoid valve operating [6 km/h (4MPH) or
faster in 1st gear or 2nd gear]
More than 2.0V
When the solenoid valve is not operating [6 km/h (4MPH)
or slower in 1st gear or 3rd, 4th, or 5th gear]
0V
13
W/L
Low coast brake
solenoid valve
When the solenoid valve is operating (when running in
M1-1 gear or M2-2 gear)
Battery voltage
When the solenoid valve is not operating (when running in
“D”)
0V
16
W/G
SEL1 (ATF pres-
sure switch 2)
–
–
–
19
R
Front brake sole-
noid valve
When
vehicle
cruises
When the solenoid valve is operating (other than 4th
gear)
More than 2.0V
When the solenoid valve is not operating (4th gear)
0V
21
G
Direct clutch sole-
noid valve
When the solenoid valve is operating (1st gear or 5th
gear)
More than 2.0V
When the solenoid valve is not operating (2nd gear, 3rd
gear, or 4th gear)
0V
22
P/B
SEL2 (ATF pres-
sure switch 5)
–
–
–
26
G/Y
PSC2 (ATF pres-
sure switch 6)
When
vehicle
cruises
When high and low reverse clutch solenoid valve ON.
0V
When high and low reverse clutch solenoid valve OFF.
Battery voltage
35
B/Y
PSB2 (ATF pres-
sure switch 1)
When front brake solenoid valve OFF.
Battery voltage
When front brake solenoid valve ON.
0V
40
Y/G
DATA BIT1
–
–
–
AT-172
DTC P1730 A/T INTERLOCK
Judgement of A/T Interlock
ACS001CV
When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2nd gear and should be set in
a condition in which it can travel.
When one of the following fastening patterns is detected, the fail-safe function in correspondence with the indi-
vidual pattern should be executed.
A/T INTERLOCK COUPLING PATTERN TABLE
●
: NG, X: OK
Diagnostic Procedure
ACS001CW
1.
SELF-DIAGNOSIS
With CONSULT-II
1.
Start engine.
2.
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3.
Drive vehicle.
Without CONSULT-II
1.
Drive vehicle.
2.
Stop vehicle and turn ignition switch OFF.
3.
Turn ignition switch ON. (Do not start engine.)
4.
Perform self-diagnosis. Refer to
AT-101, "TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)"
OK or NG
OK
>> GO TO 2.
NG
>> Check low coast brake solenoid valve circuit and function.Refer to
AT-226, "DTC P1774 LOW COAST BRAKE SOLENOID
2.
CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to
AT-167, "DTC Confirmation Procedure"
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 3.
Gear position
ATF pressure switch output
Fail-safe
function
Clutch pressure output pattern after fail-safe func-
tion
SW3
(I/C)
SW6
(HLR/
C)
SW5
(D/C)
SW1
(FR/B)
SW2
(LC/B)
I/C
HLR/C
D/C
FR/B
LC/B
L/U
A/T interlock
coupling pat-
tern
3rd
–
X
X
–
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
4th
–
X
X
–
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
5th
X
X
–
X
●
Held in
2nd gear
OFF
OFF
ON
OFF
OFF
OFF
SAT014K
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