Infiniti I30 (A33). Manual — part 64

15. Engine Speed Does Not Return To Idle
(Light Braking D

4

→

D

3

)

=NHAT0102

SYMPTOM:

I

Engine speed does not smoothly return to idle when A/T
shifts from D

4

to D

3

.

I

Vehicle does not decelerate by engine brake when turning
overdrive control switch OFF.

I

Vehicle does not decelerate by engine brake when shifting
A/T from D to 2 position.

1

CHECK SELF-DIAGNOSTIC RESULTS

Does self-diagnosis show damage to overrun clutch solenoid valve circuit after cruise test?

SAT348H

Yes or No

Yes

©

Check overrun clutch solenoid valve circuit. Refer to “DTC P1760”, AT-191.

No

©

GO TO 2.

2

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to EC-176, “DTC P0120 Throttle Position Sensor”.

SAT289K

OK or NG

OK

©

GO TO 3.

NG

©

Repair or replace throttle position sensor.

GI

MA

EM

LC

EC

FE

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

15. Engine Speed Does Not Return To Idle (Light Braking D

4

→

D

3

)

AT-253

3

CHECK A/T FLUID CONDITION

1. Remove oil pan.
2. Check A/T fluid condition.

SAT171B

OK or NG

OK

©

GO TO 5.

NG

©

GO TO 4.

4

DETECT MALFUNCTIONING ITEM

1. Remove control valve assembly. Refer to AT-280.
2. Check the following items:

I

Overrun clutch control valve

I

Overrun clutch reducing valve

I

Overrun clutch solenoid valve

3. Disassemble A/T.
4. Check the following items:

I

Overrun clutch assembly

I

Oil pump assembly

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

5

DETECT MALFUNCTIONING ITEM

1. Remove control valve assembly. Refer to AT-280.
2. Check the following items:

I

Overrun clutch control valve

I

Overrun clutch reducing valve

I

Overrun clutch solenoid valve

OK or NG

OK

©

GO TO 6.

NG

©

Repair or replace damaged parts.

6

CHECK SYMPTOM

Check again.

OK or NG

OK

©

INSPECTION END

NG

©

GO TO 7.

TROUBLE DIAGNOSES FOR SYMPTOMS

15. Engine Speed Does Not Return To Idle (Light Braking D

4

→

D

3

) (Cont’d)

AT-254

7

CHECK 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.

GI

MA

EM

LC

EC

FE

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

TROUBLE DIAGNOSES FOR SYMPTOMS

15. Engine Speed Does Not Return To Idle (Light Braking D

4

→

D

3

) (Cont’d)

AT-255

16. Vehicle Does Not Start From D

1

=NHAT0103

SYMPTOM:
Vehicle does not start from D

1

on Cruise test — Part 2.

1

CHECK SELF-DIAGNOSTIC RESULTS

Does self-diagnosis show damage to vehicle speed sensor·A/T (revolution sensor), shift solenoid valve A, B or vehicle
speed sensor·MTR after cruise test?

SAT934FA

Yes or No

Yes

©

Check damaged circuit. Refer to “DTC P0720, P0750, P0755 or VHCL SPEED
SEN·MTR”, AT-114, 172, or 203.

No

©

GO TO 2.

2

CHECK SYMPTOM

Check again.

OK or NG

OK

©

Go to 8. Vehicle Cannot Be Started From D

1

, AT-236.

NG

©

GO TO 3.

3

CHECK 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.

TROUBLE DIAGNOSES FOR SYMPTOMS

16. Vehicle Does Not Start From D

1

AT-256