Infiniti FX35 / FX45. Manual - part 70

AT-208

< SERVICE INFORMATION >

A/T SHIFT LOCK SYSTEM

A/T SHIFT LOCK SYSTEM

Description

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• The mechanical key interlock mechanism also operates as a shift lock:

With the ignition switch turned to ON, the selector lever cannot be shifted from “P” position to any other posi-
tion unless the brake pedal is depressed.
With the key removed, the selector lever cannot be shifted from “P” position to any other position.
The key cannot be removed unless the selector lever is placed in “P” position.

• The shift lock and key interlock mechanisms are controlled by the ON-OFF operation of the shift lock sole-

noid and by the operation of the rotator and slider located inside the key cylinder.

Shift Lock System Electrical Parts Location

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1.

Stop lamp switch

2.

Brake pedal

3.

Key interlock cable

4.

Shift lock solenoid

A.

Center console assembly

B.

Shift lock release button

C.

Brake pedal, upper

D.

Control device assembly

E.

Shift lock solenoid, reverse side

F.

Park position switch

SCIA8107E

A/T SHIFT LOCK SYSTEM

AT-209

< SERVICE INFORMATION >

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Wiring Diagram - AT - SHIFT

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Diagnosis Procedure

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SYMPTOM 1:
• Selector lever cannot be moved from “P” position with key in ON position and brake pedal applied.
• Selector lever can be moved from “P” position with key in ON position and brake pedal released.
• Selector lever can be moved from “P” position when key is removed from key cylinder.
SYMPTOM 2:

TCWM0589E

AT-210

< SERVICE INFORMATION >

A/T SHIFT LOCK SYSTEM

• Ignition key cannot be removed when selector lever is set to “P” position.
• Ignition key can be removed when selector lever is set to any position except “P” position.

1.

CHECK KEY INTERLOCK CABLE

Check the key interlock cable for damage.
OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace key interlock cable. Refer to 

AT-212

.

2.

CHECK SELECTOR LEVER POSITION

Check the selector lever position for damage. Refer to 

AT-207, "Checking of A/T Position"

OK or NG

OK

>> GO TO 3.

NG

>> Adjust A/T position. Refer to 

AT-207, "Adjustment of A/T Position"

.

3.

CHECK SHIFT LOCK SOLENOID AND PARK POSITION SWITCH

1.

Connect A/T device harness connector.

2.

Turn ignition switch ON.

3.

Selector lever is set in “P” position.

4.

Check operation.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 4.

4.

CHECK POWER SOURCE

1.

Turn ignition switch ON.

2.

Check the voltage between A/T device harness connector M67
terminal 1 and ground. Refer to 

AT-209, "Wiring Diagram - AT -

SHIFT"

.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 5.

5.

CHECK STOP LAMP SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect stop lamp switch harness connector.

Condition

Brake pedal

Operation

When ignition switch is turned to ON and selector lever is set in 
“P” position.

Depressed

Yes

Released

No

Condition

Brake pedal

Data (Approx.)

When ignition switch is turned to 
ON.

Depressed

Battery voltage

Released

0 V

SCIA2122E

A/T SHIFT LOCK SYSTEM

AT-211

< SERVICE INFORMATION >

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3.

Check continuity between stop lamp switch harness connector
E210 terminals 3 and 4.

Check stop lamp switch after adjusting brake pedal — refer to

BR-5

.

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace damaged parts.

6.

DETECT MALFUNCTIONING ITEM

Check the following items. If any items are damaged, repair or replace damaged parts.
• Harness for short or open between ignition switch and stop lamp switch harness connector E210 terminal 3.
• Harness for short or open between stop lamp switch harness connector E210 terminal 4 and A/T device har-

ness connector M67 terminal 1.

• 10 A fuse [No.12, located in the fuse block (J/B)].
• Ignition switch, Refer to 

PG-3

.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

7.

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect A/T device harness connector.

3.

Check continuity between A/T device harness connector M67
terminal 2 and ground.

OK or NG

OK

>> Replace shift lock solenoid and park position switch

assembly.

NG

>> Repair open circuit in harness or connectors.

Condition

Continuity

When brake pedal is depressed

Yes

When brake pedal is released

No

SCIA2126E

Continuity should exist.

SCIA2125E