Infiniti M45 (Y34). Manual — part 94

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-261

D

E

F

G

H

I

J

K

L

M

A

B

AT

5.

CHECK SYMPTOM

Check again. Refer to

AT-56, "Check at Idle"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6.

PERFORM TCM INSPECTION

1.

Perform TCM input/output signal inspection.

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.

AT-262

TROUBLE DIAGNOSIS FOR SYMPTOMS

Large Shock (“N” to “D” Position)

ACS001FU

SYMPTOM:

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

DIAGNOSTIC PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.
Do the self-diagnostic results indicate A/T fluid temperature sensor, engine speed signal, accelerator pedal
position sensor, ATF pressure switch 1, front brake solenoid valve, CAN communication line?

YES

>> Check the malfunctioning system. Refer to

AT-154, "DTC P1710 A/T FLUID TEMPERATURE

SENSOR CIRCUIT"

,

AT-121, "DTC P0725 ENGINE SPEED SIGNAL"

.,

AT-152, "DTC P1705

THROTTLE POSITION SENSOR"

,

AT-234, "DTC P1841 ATF PRESSURE SWITCH 1"

,

AT-189,

"DTC P1757 FRONT BRAKE SOLENOID VALVE"

,

AT-189, "DTC P1757 FRONT BRAKE SOLE-

NOID VALVE"

,

AT-103, "DTC U1000 CAN COMMUNICATION LINE"

.

NO

>> GO TO 2.

2.

ENGINE IDLE SPEED

Check the engine idle speed. Refer to

EC-32, "Idle Speed and Ignition Timing Check"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair.

3.

CHECK CONTROL LINKAGE

Check the control linkage.

●

Refer to

AT-305, "Checking of A/T Position"

.

OK or NG

OK

>> GO TO 4.

NG

>> Adjust control linkage. Refer to

AT-305, "Adjustment of

A/T Position"

.

4.

CHECK A/T FLUID LEVEL

Check the A/T fluid level. Refer to

AT-14, "Checking A/T Fluid"

.

OK or NG

OK

>> GO TO 5.

NG

>> Refill ATF.

SCIA1612E

SAT638A

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-263

D

E

F

G

H

I

J

K

L

M

A

B

AT

5.

CHECK LINE PRESSURE

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

AT-53, "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 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 8.

NG

>> Repair or replace damaged parts.

7.

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 8.

NG

>> Repair or replace damaged parts.

8.

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 9.

NG

>> GO TO 12.

SAT494G

SCIA5199E

AT-264

TROUBLE DIAGNOSIS FOR SYMPTOMS

9.

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.

10.

CHECK SYMPTOM

Check again. Refer to

AT-56, "Check at Idle"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 11.

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.