Infiniti F50. Manual — part 98

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-277

D

E

F

G

H

I

J

K

L

M

A

B

AT

A/T Does Not Shift: 2nd gear

→

1st gear

ECS0089R

SYMPTOM:

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

DIAGNOSTIC PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.
Do the self-diagnostic results indicate PNP switch, ATF pressure switch 5?

YES

>> Check the malfunctioning system. Refer to

AT-105, "DTC P0705 PARK/NEUTRAL POSITION

SWITCH"

,

AT-227, "DTC P1845 ATF PRESSURE SWITCH 5"

.

NO

>> GO TO 2.

2.

CHECK A/T FLUID LEVEL

Check A/T fluid level again. Refer to

AT-14, "Checking A/T Fluid"

.

OK or NG

OK

>> GO TO 3.

NG

>> Refill ATF.

3.

CHECK CONTROL LINKAGE

Check the control linkage.

●

Refer to

AT-282, "Checking of A/T Position"

.

OK or NG

OK

>> GO TO 4.

NG

>> Adjust control linkage. Refer to

AT-282, "Adjustment of

A/T Position"

.

4.

MANUAL MODE SWITCH

Check the manual mode switch. Refer to

AT-215, "DTC P1815 MANUAL MODE SWITCH"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

SAT638A

SCIA1612E

AT-278

TROUBLE DIAGNOSIS FOR SYMPTOMS

5.

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to

AT-289, "Control Valve Assembly"

.

2.

Check A/T fluid condition.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 9.

6.

DETECT MALFUNCTIONING ITEM

●

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

AT-60,

"Symptom Chart"

.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7.

CHECK SYMPTOM

Check again.
OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

8.

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.

9.

DETECT MALFUNCTIONING ITEM

●

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

AT-60,

"Symptom Chart"

.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

SAT171B

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-279

D

E

F

G

H

I

J

K

L

M

A

B

AT

Vehicle Does Not Decelerate By Engine Brake

ECS0089S

SYMPTOM:

No engine brake is applied when the gear is shifted from the 2nd to 1st gear.

DIAGNOSTIC PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.
Do the self-diagnostic results indicate PNP switch, ATF pressure switch 5?

YES

>> Check the malfunctioning system. Refer to

AT-105, "DTC P0705 PARK/NEUTRAL POSITION

SWITCH"

,

AT-227, "DTC P1845 ATF PRESSURE SWITCH 5"

.

NO

>> GO TO 2.

2.

CHECK A/T FLUID LEVEL

Check A/T fluid level again. Refer to

AT-14, "Checking A/T Fluid"

.

OK or NG

OK

>> GO TO 3.

NG

>> Refill ATF.

3.

CHECK CONTROL LINKAGE

Check the control linkage.

●

Refer to

AT-282, "Checking of A/T Position"

.

OK or NG

OK

>> GO TO 4.

NG

>> Adjust control linkage. Refer to

AT-282, "Adjustment of

A/T Position"

.

4.

MANUAL MODE SWITCH

Check the manual mode switch. Refer to

AT-215, "DTC P1815 MANUAL MODE SWITCH"

.

OK or NG

OK

>> GO TO 5.

NG

>> Repair or replace damaged parts.

SAT638A

SCIA1612E

AT-280

TROUBLE DIAGNOSIS FOR SYMPTOMS

5.

CHECK A/T FLUID CONDITION

1.

Remove oil pan. Refer to

AT-289, "Control Valve Assembly"

.

2.

Check A/T fluid condition.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 9.

6.

DETECT MALFUNCTIONING ITEM

●

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

AT-60,

"Symptom Chart"

.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

7.

CHECK SYMPTOM

Check again.
OK or NG

OK

>> INSPECTION END

NG

>> GO TO 8.

8.

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.

9.

DETECT MALFUNCTIONING ITEM

●

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

AT-60,

"Symptom Chart"

.

OK or NG

OK

>> GO TO 7.

NG

>> Repair or replace damaged parts.

SAT171B