Infiniti M45 (Y34). Manual - part 97

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-273

D

E

F

G

H

I

J

K

L

M

A

B

AT

11. 

CHECK TCM

1.

Check TCM input/output signal. Refer to 

AT-86, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

12. 

DETECT MALFUNCTIONING ITEM

●

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

AT-63,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Repair or replace damaged parts.

AT-274

TROUBLE DIAGNOSIS FOR SYMPTOMS

A/T Does Not Shift: D

1

  

→

 D

2

ACS001FY

SYMPTOM:

The vehicle does not shift-up from D

1

  to D

2

  gear at the specified speed.

DIAGNOSTIC PROCEDURE

1. 

CONFIRM THE SYMPTOM

Check if vehicle creeps forward in “D” position and vehicle can be started from D

1.

OK or NG

OK

>> GO TO 2.

NG

>> Refer to 

AT-268, "Vehicle Does Not Creep Forward in “D” Position"

 , 

AT-271, "Vehicle Cannot Be

Started From D

1

"

 .

2. 

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.
Do the self-diagnostic results indicate ATF pressure switch 5, direct clutch solenoid valve, accelerator pedal
position sensor, vehicle speed sensor A/T (revolution sensor) and vehicle speed sensor MTR?

YES

>> Check the malfunctioning system. Refer to 

AT-242, "DTC P1845 ATF PRESSURE SWITCH 5"

 ,

AT-199, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"

 , 

AT-152, "DTC P1705 THROTTLE

POSITION SENSOR"

 , 

AT-116, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION

SENSOR)"

 , 

AT-165, "DTC P1721 VEHICLE SPEED SENSOR MTR"

 .

NO

>> GO TO 3.

3. 

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to 

AT-14, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Refill ATF.

4. 

CHECK LINE PRESSURE

Check line pressure at the engine stall point. Refer to 

AT-53, "LINE

PRESSURE TEST"

 .

OK or NG

OK

>> GO TO 7.

NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.

SAT638A

SAT494G

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-275

D

E

F

G

H

I

J

K

L

M

A

B

AT

5. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve assembly. Refer to 

AT-312, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-342, "DISASSEMBLY"

 .

3.

Check the following items:

–

Oil pump assembly. Refer to 

AT-357, "Oil Pump"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

6. 

DETECT MALFUNCTIONING ITEM

1.

Check control valve assembly. Refer to 

AT-312, "Control Valve Assembly"

 .

2.

Disassemble A/T. Refer to 

AT-342, "DISASSEMBLY"

 .

3.

Check the following items:

–

Oil pump assembly. Refer to 

AT-357, "Oil Pump"

 .

–

Power train system. Refer to 

AT-342, "DISASSEMBLY"

 .

–

Transmission case. Refer to 

AT-342, "DISASSEMBLY"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to 

AT-312, "Control Valve Assembly"

 .

2.

Check A/T fluid condition. Refer to 

AT-52, "Fluid Condition

Check"

 .

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 11.

8. 

DETECT MALFUNCTIONING ITEM

●

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

AT-63,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

9. 

CHECK SYMPTOM

Check again. Refer to 

AT-58, "Cruise Test - Part 1"

 , 

AT-60, "Cruise Test - Part 2"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 10.

SCIA5199E

AT-276

TROUBLE DIAGNOSIS FOR SYMPTOMS

10. 

CHECK TCM

1.

Check TCM input/output signal. Refer to 

AT-86, "TCM Input/Output Signal Reference Values"

 .

2.

If NG, recheck TCM pin terminals for damage or loose connection with harness connector.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace damaged parts.

11. 

DETECT MALFUNCTIONING ITEM

●

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

AT-63,

"Symptom Chart"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.