Infiniti M35/M45 Y50. Manual - part 73

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-215

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6. 

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.47).

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK SYMPTOM

Check again. Refer to 

AT-61, "Cruise Test - Part 3"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

8. 

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.

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.47).

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

A/T Does Not Shift: 4th Gear 

→

 3rd Gear

NCS001QH

SYMPTOM:

When shifted from M4 to M3 position in manual mode, does not downshift from 4th to 3rd gear.

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 FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Refill ATF.

AT-216

TROUBLE DIAGNOSIS FOR SYMPTOMS

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 MANUAL MODE SWITCH

Check manual mode switch. Refer to 

AT-167, "DTC P1815 MANUAL MODE SWITCH"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

5. 

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 6.

NG

>> GO TO 9.

6. 

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.48).

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK SYMPTOM

Check again. Refer to 

AT-61, "Cruise Test - Part 3"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

8. 

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.

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.48).

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-217

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A/T Does Not Shift: 3rd Gear 

→

 2nd Gear

NCS001QI

SYMPTOM:

When shifted from M3 to M2 position in manual mode, does not downshift from 3rd to 2nd gear.

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 FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Refill ATF.

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 MANUAL MODE SWITCH

Check manual mode switch. Refer to 

AT-167, "DTC P1815 MANUAL MODE SWITCH"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

5. 

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 6.

NG

>> GO TO 9.

6. 

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.49).

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7. 

CHECK SYMPTOM

Check again. Refer to 

AT-61, "Cruise Test - Part 3"

 .

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

AT-218

TROUBLE DIAGNOSIS FOR SYMPTOMS

8. 

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.

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.49).

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

A/T Does Not Shift: 2nd Gear 

→

 1st Gear

NCS001QJ

SYMPTOM:

When shifted from M2 to M1 position in manual mode, does not downshift from 2nd to 1st gear.

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 FLUID LEVEL

Check A/T fluid level. Refer to 

AT-13, "Checking A/T Fluid"

 .

OK or NG

OK

>> GO TO 3.

NG

>> Refill ATF.

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 MANUAL MODE SWITCH

Check manual mode switch. Refer to 

AT-167, "DTC P1815 MANUAL MODE SWITCH"

 .

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.