Infiniti I30 (A33). Manual — part 34

Wiring Diagram — AT — 2ND

NHAT0050

MAT809A

SAT298K

GI

MA

EM

LC

EC

FE

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0732 A/T 2ND GEAR FUNCTION

Wiring Diagram — AT — 2ND

AT-133

Diagnostic Procedure

NHAT0051

1

CHECK VALVE RESISTANCE

1. Remove control valve assembly. Refer to AT-280.

I

Shift solenoid valve B

2. Check resistance to the terminal and ground.

SAT045KA

OK or NG

OK

©

GO TO 2.

NG

©

Repair or replace shift solenoid valve assembly.

2

CHECK VALVE OPERATION

1. Remove control valve assembly. Refer to AT-280.

I

Shift solenoid valve B

2. Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.

SAT036K

OK or NG

OK

©

GO TO 3.

NG

©

Repair or replace shift solenoid valve assembly.

DTC P0732 A/T 2ND GEAR FUNCTION

Diagnostic Procedure

AT-134

3

CHECK CONTROL VALVE

1. Disassemble control valve assembly. Refer to “Control Valve Assembly”, AT-312.
2. Check to ensure that:

I

Valve, sleeve and plug slide along valve bore under their own weight.

I

Valve, sleeve and plug are free from burrs, dents and scratches.

I

Control valve springs are free from damage, deformation and fatigue.

I

Hydraulic line is free from obstacles.

SAT367H

OK or NG

OK

©

GO TO 4.

NG

©

Repair control valve assembly.

4

CHECK DTC

Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-131.

OK or NG

OK

©

INSPECTION END

NG

©

Check control valve again. Repair or replace control valve assembly.

GI

MA

EM

LC

EC

FE

AX

SU

BR

ST

RS

BT

HA

SC

EL

IDX

DTC P0732 A/T 2ND GEAR FUNCTION

Diagnostic Procedure (Cont’d)

AT-135

Description

NHAT0052

I

This is an OBD-II self-diagnostic item and not available in TCM
self-diagnosis.

I

This malfunction will not be detected while the O/D OFF indi-
cator lamp is indicating another self-diagnosis malfunction.

I

This malfunction is detected when the A/T does not shift into
third gear position as instructed by the TCM. This is not caused
by electrical malfunction (circuits open or shorted) but by
mechanical malfunction such as control valve sticking,
improper solenoid valve operation, malfunctioning servo piston
or brake band, etc.

Gear position

1

2

3

4

Shift solenoid valve A

ON (Closed)

OFF (Open)

OFF (Open)

ON (Closed)

Shift solenoid valve B

ON (Closed)

ON (Closed)

OFF (Open)

OFF (Open)

TCM TERMINALS AND REFERENCE VALUE

NHAT0052S01

Remarks: Specification data are reference values.

Terminal

No.

Wire color

Item

Condition

Judgement

standard

(Approx.)

11

R/Y

Shift solenoid valve
A

When shift solenoid valve A operates.
(When driving in D

1

or D

4

.)

Battery volt-
age

When shift solenoid valve A does not operate.
(When driving in D

2

or D

3

.)

0V

On Board Diagnosis Logic

NHAT0219

This diagnosis monitors actual gear position by checking the torque
converter slip ratio calculated by TCM as follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (3rd) supposed
by TCM, the slip ratio will be more than normal. In case the ratio
exceeds the specified value, TCM judges this diagnosis malfunc-
tion.
This malfunction will be caused when shift solenoid valve A is stuck
closed.
Gear positions supposed by TCM are as follows.
In case of gear position with no malfunctions: 1, 2, 3 and 4 posi-
tions
In case of gear position with shift solenoid valve A stuck closed: 1,
1, 4* and 4 positions to each gear position above
*: P0733 is detected.
Diagnostic trouble code A/T 3RD GR FNCTN with CONSULT-II or
P0733 without CONSULT-II is detected when A/T cannot be shifted
to the 3rd gear position even if electrical circuit is good.

DTC P0733 A/T 3RD GEAR FUNCTION

Description

AT-136