Infiniti Q45. Manual - part 77

A/T SHIFT LOCK SYSTEM

AT-221

D

E

F

G

H

I

J

K

L

M

A

B

AT

TCWM0485E

AT-222

A/T SHIFT LOCK SYSTEM

Shift Lock Control Unit Reference Values

NCS00117

SHIFT LOCK CONTROL UNIT HARNESS CONNECTOR TERMINALS LAYOUT

SHIFT LOCK CONTROL UNIT INSPECTION TABLE

Data are reference values.

NOTE:
Make sure that the pointer swings only momentarily because the output time is so short. If the inspection is done with an oscilloscope, it
should be observed that the power source voltage lasts for 3.5 to 10 ms.

SCIA2004E

Terminal (Wire 

color)

Item

Condition

Judgement standard

1

(LG)

8

(B)

Power source

Always

Battery voltage

2

(G/OR)

8

(B)

Detention switch (for 
key)

When selector lever is not in “P” position with 
key inserted.

Battery voltage

When selector lever is in “P” position with key 
inserted.

Approx. 0 V

3

(LG/R)

8

(B)

Detention switch (for 
shift)

When selector lever is not “P” position.

Battery voltage

When selector lever is “P” position.

Approx. 0 V

4

(R/W)

8

(B)

Stop lamp switch

When brake pedal is depressed

Battery voltage

When brake pedal is released

Approx. 0 V

5

(OR/L)

8

(B)

Vehicle speed signal 
(8pulse signal)

Speed meter is operated

Refer to 

DI-15

 .

6

(R/L)

8

(B)

Ignition signal

Ignition switch: OFF

Approx. 0 V

Ignition switch: ON

Battery voltage

7

(L/W)

8

(B)

Shift lock solenoid

●

When selector lever is in “P” position, brake 
pedal is depressed, and ignition switch is ON.

●

When selector lever is not in “P” position, 
ignition switch is ON, and vehicle speed is 10 
km/h (6 MPH) or less.

●

For 3 minutes after selector lever is not in “P” 
position, vehicle speed is 10 km/h (6 MPH) or 
less, and ignition switch is ON 

→

 OFF.

Approx. 0V

Except the above

Battery voltage

8

(B)

—

Ground

Always

Approx. 0 V

9

(P)

8

(B)

Key lock solenoid 
(for lock)

When selector lever is not “P” position.

Battery voltage for approx. 0.1 sec. 
(Note)

When selector lever is “P” position.

Approx. 0 V

10

(BR/Y)

8

(B)

Key unlock solenoid 
(for unlock)

When selector lever is “P” position with ignition 
switch is OFF.

Battery voltage for approx. 0.1 sec. 
(Note)

When selector lever is not “P” position with igni-
tion switch is OFF.

Approx. 0 V

A/T SHIFT LOCK SYSTEM

AT-223

D

E

F

G

H

I

J

K

L

M

A

B

AT

Component Inspection

NCS00118

SHIFT LOCK SOLENOID

●

Check operation by applying battery voltage to the A/T device
harness connector.

CAUTION:

Be sure to apply the voltage of the correct polarity to the
respective terminals. Otherwise, the part may be damaged.

DETENTION SWITCH (FOR KEY)

●

Check continuity between terminals of the A/T device harness
connector.

DETENTION SWITCH (FOR SHIFT)

●

Check continuity between terminals of the A/T device harness
connector terminals.

KEY LOCK SOLENOID
Key Lock 

●

Check operation by applying battery voltage to key switch and
key lock solenoid harness connector.

CAUTION:

Be careful not to cause burnout of the harness.

Connector

Terminal

M97

10 (Battery voltage) - 9 (Ground)

SCIA4500E

Condition

Connector

Terminal

Continuity

When selector lever is “P” 
position.

M97

6 - 7

No

When selector lever is not “P” 
position.

Yes

SCIA4501E

Condition

Connector

Terminal

Continuity

When selector lever is “P” 
position.

M97

13 - 14 

No

When selector lever is not “P” 
position.

Yes

SCIA4502E

Connector

Terminal 

M64

1 (Battery voltage) - 2 (Ground)

SCIA2042E

AT-224

A/T SHIFT LOCK SYSTEM

Key Unlock

●

Check operation by applying battery voltage to key switch and
key lock solenoid harness connector.

CAUTION:

Be careful not to cause burnout of the harness.

KEY SWITCH

●

Check continuity between terminals of the key switch and key
lock solenoid harness connector.

STOP LAMP SWITCH

●

Check continuity between terminals of the stop lamp switch har-
ness connector.

Check stop lamp switch after adjusting brake pedal. Refer to 

BR-6,

"BRAKE PEDAL"

 .

Connector

Terminal 

M64

2 (Battery voltage) - 1 (Ground)

SCIA2043E

Condition

Connector

Terminal

Continuity

Key inserted

M64

3 - 4

Yes

Key withdrawn

No

SCIA2044E

Condition

Connector

Terminal

Continuity

When brake pedal is depressed

M402

3 - 4

Yes

When brake pedal is released

No

SCIA2126E