Infiniti M35/M45 Y50. Manual — part 70

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-203

D

E

F

G

H

I

J

K

L

M

A

B

AT

A/T Does Not Shift: D

2

→

D

3

NCS001Q8

SYMPTOM:

The vehicle does not shift-up from D

2

to D

3

gear at the specified speed.

DIAGNOSTIC PROCEDURE

1.

CONFIRM THE SYMPTOM

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

1.

OK or NG

OK

>> GO TO 2.

NG

>> Refer to

AT-197, "Vehicle Does Not Creep Forward in “D” Position"

,

AT-199, "Vehicle Cannot Be

Started from D

1

"

.

2.

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 3.

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 LINE PRESSURE

Check line pressure at the engine stall point. Refer to

AT-55, "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.

5.

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 7.

NG

>> Repair or replace damaged parts.

AT-204

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"

.

–

Power train system. Refer to

AT-301, "DISASSEMBLY"

.

–

Transmission case. Refer to

AT-301, "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-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 8.

NG

>> GO TO 11.

8.

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.11).

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

9.

CHECK SYMPTOM

Check again. Refer to

AT-59, "Cruise Test - Part 1"

,

AT-61, "Cruise Test - Part 2"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 10.

10.

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.

11.

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.11).

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-205

D

E

F

G

H

I

J

K

L

M

A

B

AT

A/T Does Not Shift: D

3

→

D

4

NCS001Q9

SYMPTOM:

The vehicle does not shift-up from the D

3

to D

4

gear at the specified speed.

DIAGNOSTIC PROCEDURE

1.

CONFIRM THE SYMPTOM

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

1.

OK or NG

OK

>> GO TO 2.

NG

>> Refer to

AT-197, "Vehicle Does Not Creep Forward in “D” Position"

,

AT-199, "Vehicle Cannot Be

Started from D

1

"

.

2.

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 3.

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 LINE PRESSURE

Check line pressure at the engine stall point. Refer to

AT-55, "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.

5.

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 7.

NG

>> Repair or replace damaged parts.

AT-206

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"

.

–

Power train system. Refer to

AT-301, "DISASSEMBLY"

.

–

Transmission case. Refer to

AT-301, "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-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 8.

NG

>> GO TO 11.

8.

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.12).

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.

9.

CHECK SYMPTOM

Check again. Refer to

AT-59, "Cruise Test - Part 1"

,

AT-61, "Cruise Test - Part 2"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 10.

10.

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.

11.

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.12).

OK or NG

OK

>> GO TO 9.

NG

>> Repair or replace damaged parts.