Infiniti M35/M45 Y50. Manual — part 68

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-195

D

E

F

G

H

I

J

K

L

M

A

B

AT

Vehicle Does Not Creep Backward in “R” Position

NCS001Q4

SYMPTOM:

The vehicle does not creep in “R” position. Or an extreme lack of acceleration is observed.

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-diagnosis results?

YES

>> Check malfunctioning system. Refer to

AT-92, "SELF-DIAGNOSTIC RESULT MODE"

,

AT-104,

"Judgement Self-diagnosis Code"

.

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 STALL TEST

Check stall revolution with selector lever in “M” and “R” positions.
Refer to

AT-53, "STALL TEST"

.

OK or NG

OK

>> GO TO 6.

OK in “M” position, NG in “R” position>>GO TO 5
NG in both “M” and “R” positions>>GO TO 8.

5.

DETECT MALFUNCTIONING ITEM

1.

Disassemble A/T. Refer to

AT-301, "DISASSEMBLY"

.

2.

Check the following.

–

Reverse brake. Refer to

AT-301, "DISASSEMBLY"

.

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

6.

CHECK LINE PRESSURE

Check line pressure with the engine idling. Refer to

AT-55, "LINE PRESSURE TEST"

.

OK or NG

OK

>> GO TO 9.

NG - 1 >> Line pressure high: GO TO 7.
NG - 2 >> Line pressure low: GO TO 8.

AT-196

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"

.

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

8.

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 9.

NG

>> Repair or replace damaged parts.

9.

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 13.

10.

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.43).

OK or NG

OK

>> GO TO 11.

NG

>> Repair or replace damaged parts.

11.

CHECK SYMPTOM

Check again. Refer to

AT-57, "Check at Idle"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 12.

12.

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-197

D

E

F

G

H

I

J

K

L

M

A

B

AT

13.

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.43).

OK or NG

OK

>> GO TO 11.

NG

>> Repair or replace damaged parts.

Vehicle Does Not Creep Forward in “D” Position

NCS001Q5

SYMPTOM:

Vehicle does not creep forward when selecting “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.

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 STALL TEST

Check stall revolution with selector lever in “D” position. Refer to

AT-53, "STALL TEST"

.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 7.

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.

AT-198

TROUBLE DIAGNOSIS FOR SYMPTOMS

6.

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"

.

OK or NG

OK

>> GO TO 8.

NG

>> Repair or replace damaged parts.

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 9.

NG

>> GO TO 12.

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.43).

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.