Infiniti M45 (Y34). Manual — part 101

TROUBLE DIAGNOSIS FOR SYMPTOMS

AT-289

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6.

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.

7.

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 5.

NG

>> Repair or replace damaged parts.

AT-290

TROUBLE DIAGNOSIS FOR SYMPTOMS

Lock-up is Not Released

ACS001G4

SYMPTOM:

The lock-up condition cannot be cancelled even after releasing the accelerator pedal.

DIAGNOSTIC PROCEDURE

1.

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.
Do the self-diagnostic results indicate torque converter clutch solenoid valve, engine speed signal, turbine rev-
olution sensor, CAN communication line?

YES

>> Check the malfunctioning system. Refer to

AT-123, "DTC P0740 TORQUE CONVERTER

CLUTCH SOLENOID VALVE"

,

AT-121, "DTC P0725 ENGINE SPEED SIGNAL"

,

AT-160, "DTC

P1716 TURBINE REVOLUTION SENSOR"

,

AT-103, "DTC U1000 CAN COMMUNICATION

LINE"

.

NO

>> GO TO 2.

2.

CHECK SYMPTOM

Check again. Refer to

AT-58, "Cruise Test - Part 1"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 3.

3.

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.

TROUBLE DIAGNOSIS FOR SYMPTOMS

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Engine Speed Does Not Return to Idle

ACS001G5

SYMPTOM:

When a shift-down is performed, the engine speed does not smoothly return to the idling speed.

DIAGNOSTIC PROCEDURE

1.

CHECK A/T FLUID LEVEL

Check A/T fluid level. Refer to

AT-14, "Checking A/T Fluid"

.

OK or NG

OK

>> GO TO 2.

NG

>> Refill ATF.

2.

CHECK SELF-DIAGNOSTIC RESULTS

Execute self-diagnosis.
Do the self-diagnostic results indicate front brake solenoid valve, direct clutch solenoid valve, ATF pressure
switch 1, ATF pressure switch 5, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?

YES

>> Check the malfunctioning system. Refer to

AT-189, "DTC P1757 FRONT BRAKE SOLENOID

VALVE"

,

AT-199, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"

,

AT-234, "DTC P1841 ATF

PRESSURE SWITCH 1"

,

AT-242, "DTC P1845 ATF PRESSURE SWITCH 5"

,

AT-152, "DTC

P1705 THROTTLE POSITION SENSOR"

,

AT-116, "DTC P0720 VEHICLE SPEED SENSOR A/T

(REVOLUTION SENSOR)"

,

AT-165, "DTC P1721 VEHICLE SPEED SENSOR MTR"

.

NO

>> GO TO 3.

3.

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 4.

NG

>> GO TO 7.

4.

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 5.

NG

>> Repair or replace damaged parts.

SAT638A

SCIA5199E

AT-292

TROUBLE DIAGNOSIS FOR SYMPTOMS

5.

CHECK SYMPTOM

Check again. Refer to

AT-58, "Cruise Test - Part 1"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 6.

6.

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.

7.

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 5.

NG

>> Repair or replace damaged parts.