Infiniti F50. Manual - part 69

DTC P1730 A/T INTERLOCK

AT-161

D

E

F

G

H

I

J

K

L

M

A

B

AT

TCWM0014E

AT-162

DTC P1730 A/T INTERLOCK

TCM terminals and data are reference value. Measured between each terminal and ground.

TCWM0015E

Terminal   

No.

Wire 

color

Item

Condition

Data (Approx.)

4

P/L

SEL3 (pressure 
switch 3)

–

–

–

DTC P1730 A/T INTERLOCK

AT-163

D

E

F

G

H

I

J

K

L

M

A

B

AT

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 2V

When the solenoid valve is not operating (4th gear or 5th 
gear)

0V

11

R/L

High & low 
reverse clutch 
solenoid valve

When the solenoid valve operating [6 km/h (4MPH) or 
faster in 1st gear or 2nd gear]

More than 2V

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 (pressure 
switch 2)

–

–

–

19

R

Front brake sole-
noid valve

When 

vehicle 
cruises

When the solenoid valve is operating (other than 4th 
gear)

More than 2V

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 2V

When the solenoid valve is not operating (2nd gear, 3rd 
gear, or 4th gear)

0V

22

P/B

SEL2 (pressure 
switch 5)

–

–

–

26

G/Y

PSC2 (pressure 
switch 6)

When 

vehicle 
cruises

When high & low reverse clutch solenoid valve “ON”.

0V

When high & low reverse clutch solenoid valve “OFF”.

Battery voltage

35

B/Y

PSB2 (pressure 
switch 1)

When front brake solenoid valve “OFF”.

Battery voltage

When front brake solenoid valve“ ON”.

0V

40

Y/G

DATA BIT1

–

–

–

Terminal   

No.

Wire 

color

Item

Condition

Data (Approx.)

AT-164

DTC P1730 A/T INTERLOCK

Judgement of A/T Interlock

ECS0086C

When A/T Interlock is judged to be malfunctioning, the vehicle should be fixed in 2nd, 4th, or 5th 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

Gear position

ATF pressure switch output

Fail-safe 

function

Clutch pressure output pattern after fail-safe func-

tion

SW3 

(I/C)

SW6 

(H&LR

/C)

SW5 

(D/C)

SW1 

(Fr/B)

SW2 

(LC/B)

I/C

H&LR/

C

D/C

Fr/B

LC/B

L/U

A/T interlock 
coupling pat-
tern

1st

●

X

–

X

X

Held in 4th 

gear

ON

ON

ON

OFF

OFF

OFF

–

X

●

–

X

Held in 4th 

gear

ON

ON

ON

OFF

OFF

OFF

2nd

–

●

X

–

X

Held in 4th 

gear

ON

ON

ON

OFF

OFF

OFF

●

–

X

X

–

Held in 4th 

gear

ON

ON

ON

OFF

OFF

OFF

3rd

–

X

X

–

●

Held in 

2nd gear

OFF

OFF

ON

OFF

OFF

OFF

●

–

X

X

–

Held in 4th 

gear

ON

ON

ON

OFF

OFF

OFF

4th

–

X

X

–

●

Held in 

2nd gear

OFF

OFF

ON

OFF

OFF

OFF

X

–

X

●

–

Held in 5th 

gear

ON

ON

OFF

ON

OFF

OFF

5th

X

X

–

X

●

Held in 

2nd gear

OFF

OFF

ON

OFF

OFF

OFF

X

–

●

X

–

Held in 4th 

gear

ON

ON

ON

OFF

OFF

OFF