Infiniti M35/M45 Y50. Manual - part 67

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-191

D

E

F

G

H

I

J

K

L

M

A

B

AT

2. 

CHECK A/T POSITION

Check A/T position. Refer to 

AT-228, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Adjust A/T position. Refer to 

AT-227, "Adjustment of A/T Position"

 .

3. 

CHECK STARTING SYSTEM

Check starting system. Refer to 

SC-8, "STARTING SYSTEM"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

In “P” Position, Vehicle Moves When Pushed

NCS001Q1

SYMPTOM:

Even though the selector lever is set in “P” position, the parking mechanism is not actuated, allowing
the vehicle to be moved when it is pushed.

DIAGNOSTIC PROCEDURE

1. 

CHECK PNP SWITCH CIRCUIT

Perform self-diagnosis. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-103, "TCM SELF-DIAG-

NOSTIC PROCEDURE (NO TOOLS)"

 .

Do the self-diagnostic results indicate PNP switch?

YES

>> Check malfunctioning system. Refer to 

AT-113, "DTC P0705 PARK/NEUTRAL POSITION

SWITCH"

 .

NO

>> GO TO 2.

2. 

CHECK A/T POSITION

Check A/T position. Refer to 

AT-228, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Adjust A/T position. Refer to 

AT-227, "Adjustment of A/T Position"

 .

3. 

CHECK PARKING COMPONENTS

Check parking components. Refer to 

AT-250, "REMOVAL AND INSTALLATION (VQ35DE MODELS)"

(VQ35DE models for 2WD), 

AT-301, "DISASSEMBLY"

  (VQ35DE models for AWD), 

AT-257, "REMOVAL AND

INSTALLATION (VK45DE MODELS)"

  (VK45DE models).

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace damaged parts.

4. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-53, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> INSPECTION END

NG

>> Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-

64, "Symptom Chart"

  (Symptom No.65).

AT-192

TROUBLE DIAGNOSIS FOR SYMPTOMS

In “N” Position, Vehicle Moves

NCS001Q2

SYMPTOM:

Vehicle moves forward or backward when selecting “N” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK PNP SWITCH CIRCUIT

Perform self-diagnosis. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-103, "TCM SELF-DIAG-

NOSTIC PROCEDURE (NO TOOLS)"

 .

Do the self-diagnostic results indicate PNP switch?

YES

>> Check malfunctioning system. Refer to 

AT-113, "DTC P0705 PARK/NEUTRAL POSITION

SWITCH"

 .

NO

>> GO TO 2.

2. 

CHECK A/T POSITION

Check A/T position. Refer to 

AT-228, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Adjust A/T position. Refer to 

AT-227, "Adjustment of A/T Position"

 .

3. 

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Refill ATF.

4. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-53, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-

64, "Symptom Chart"

  (Symptom No.67).

5. 

CHECK SYMPTOM

Check again. Refer to 

AT-57, "Check at Idle"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6. 

CHECK TCM

1.

Check TCM input/output signals. Refer to 

AT-89, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-193

D

E

F

G

H

I

J

K

L

M

A

B

AT

Large Shock (“N” to “D” Position)

NCS001Q3

SYMPTOM:

A noticeable shock occurs when the selector lever is shifted from “N” to “D” position.

DIAGNOSTIC PROCEDURE

1. 

CHECK SELF-DIAGNOSTIC RESULTS

Perform self-diagnosis. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-103, "TCM SELF-DIAG-

NOSTIC PROCEDURE (NO TOOLS)"

 .

Is any malfunction detected by self-diagnostic results?

YES

>> Check malfunctioning system. Refer to 

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

 , 

AT-104,

"Judgement Self-diagnosis Code"

 .

NO

>> GO TO 2.

2. 

ENGINE IDLE SPEED

Check engine idle speed. Refer to 

EC-83, "Idle Speed and Ignition Timing Check"

  (for VQ35DE engine), 

EC-

785, "Idle Speed and Ignition Timing Check"

  (for VK45DE engine).

OK or NG

OK

>> GO TO 3.

NG

>> Adjust engine idle speed. Refer to 

EC-83, "Idle Speed and Ignition Timing Check"

  (for VQ35DE

engine), 

EC-785, "Idle Speed and Ignition Timing Check"

  (for VK45DE engine).

3. 

CHECK A/T POSITION

Check A/T position. Refer to 

AT-228, "Checking of A/T Position"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Adjust A/T position. Refer to 

AT-227, "Adjustment of A/T Position"

 .

4. 

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Refill ATF.

5. 

CHECK LINE PRESSURE

Check line pressure at idle with selector lever in “D” position. Refer to 

AT-55, "LINE PRESSURE TEST"

 .

OK or NG

OK

>> GO TO 8.

NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.

6. 

DETECT MALFUNCTIONING

1.

Check control valve with TCM. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-301, "DISASSEMBLY"

 .

3.

Check the following.

–

Oil pump assembly. Refer to 

AT-322, "Oil Pump"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

AT-194

TROUBLE DIAGNOSIS FOR SYMPTOMS

7. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve with TCM. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sen-

sor 2"

 .

2.

Disassemble A/T. Refer to 

AT-301, "DISASSEMBLY"

 .

3.

Check the following.

–

Oil pump assembly. Refer to 

AT-322, "Oil Pump"

 .

–

Power train system. Refer to 

AT-301, "DISASSEMBLY"

 .

–

Transmission case. Refer to 

AT-301, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

8. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-236, "Control Valve With TCM and A/T Fluid Temperature Sensor 2"

 .

2.

Check A/T fluid condition. Refer to 

AT-53, "A/T Fluid Condition Check"

 .

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9. 

DETECT MALFUNCTIONING ITEM

Check malfunction items. If any items are damaged, repair or replace damaged parts. Refer to 

AT-64, "Symp-

tom Chart"

  (Symptom No.1).

OK or NG

OK

>> GO TO 10.

NG

>> Repair or replace damaged parts.

10. 

CHECK SYMPTOM

Check again. Refer to 

AT-57, "Check at Idle"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 11.

11. 

CHECK TCM

1.

Check TCM input/output signals. Refer to 

AT-89, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.