Nissan Tiida C11. Manual - part 1252

DTC P0731 A/T 1ST GEAR FUNCTION

TM-59

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

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DTC P0731 A/T 1ST GEAR FUNCTION

Description

INFOID:0000000001694313

• This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis

malfunction.

• This malfunction is detected when the A/T does not shift into first 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, etc.

On Board Diagnosis Logic

INFOID:0000000001694314

• This is an OBD self-diagnostic item.
• Diagnostic trouble code “P0731 A/T 1ST GR FNCTN” with CONSULT-III is detected when A/T cannot be

shifted to the 1st gear position even if electrical circuit is good.

• 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 (1st) supposed by TCM, the slip ratio will be more than
normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
This malfunction will be caused when either shift solenoid valve A is stuck open or shift solenoid valve B is
stuck open.

• Gear positions supposed by TCM are as follows:

In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve A stuck open: 2*, 2, 3 and 3 positions
In case of gear position with shift solenoid valve B stuck open: 4*, 3, 3 and 4 positions to each gear position
above
*: “P0731 A/T 1ST GR FNCTN” is detected.

Possible Cause

INFOID:0000000001694315

• Shift solenoid valve A
• Shift solenoid valve B
• Each clutch
• Hydraulic control circuit

DTC Confirmation Procedure

INFOID:0000000001694316

CAUTION:

• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at

least 10 seconds before continuing.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-III

1.

Start engine and select “DATA MONITOR” mode for “A/T” with CONSULT-III.

2.

Touch “START”.

3.

Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the
voltage (cool down the fluid).

4.

Select “1ST GR FNCTN P0731” of “DTC WORK SUPPORT” mode for “A/T” with CONSULT-III and touch
“START”.

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)

TM-60

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

DTC P0731 A/T 1ST GEAR FUNCTION

5.

Accelerate vehicle to 20 to 25 km/h (12 to 16 MPH) under the following conditions and release the accel-
erator pedal completely.
THROTTLE POSI: Less than 1.0/8 (at all times during step 4)
SLCT LVR POSI: “D” position

-

Make sure that “GEAR” shows “2” after releasing pedal.

6.

Depress accelerator pedal to WOT (more than 7.0/8 of “THROTTLE POSI”) quickly from a speed of 20 to
25 km/h (12 to 16 MPH) until “TESTING” changes to “STOP VEHICLE” or “COMPLETED”. (It will take
approximately 3 seconds.)
If the check result NG appears on CONSULT-III screen, go to 

TM-60, "Diagnosis Procedure"

.

If “STOP VEHICLE” appears on CONSULT-III screen, go to the following step.

-

Make sure that “GEAR” shows “1” when depressing accelerator pedal to WOT.

-

If “TESTING” does not appear on CONSULT-III for a long time, select “SELF-DIAG RESULTS” for
“A/T”. In case a DTC other than “P0731 A/T 1ST GR FNCTN” is shown, refer to 

TM-35, "CONSULT-

III Function (TRANSMISSION)"

.

7.

Stop vehicle.

8.

Follow the instruction displayed. (Check for normal shifting referring to the table below.)

9.

Make sure that “OK” is displayed. (If “NG” is displayed, refer to “Diagnostic Procedure”.)
Refer to 

TM-60, "Diagnosis Procedure"

.

Refer to 

TM-319, "Vehicle Speed at Which Gear Shifting Occurs"

.

 WITH GST

Follow the procedure “WITH CONSULT-III”.

Diagnosis Procedure

INFOID:0000000001694317

1.

CHECK VALVE RESISTANCE

1.

Remove control valve assembly. Refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

-

Shift solenoid valve A

-

Shift solenoid valve B

2.

Check resistance between terminal cord assembly harness con-
nector terminals and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace damaged parts.

2.

CHECK VALVE OPERATION

Vehicle condition

Gear on actual transmission shift pattern when screen is changed to 1 

→

 2 

→

 3 

→

 4

No malfunction exists.

1 

→

 2 

→

 3 

→

 4

Malfunction for “A/T 1ST GR FNCTN ” exists.

2 

→

 2 

→

 3 

→

 3

4 

→

 3 

→

 3 

→

 4

Solenoid valve

Terminal

Resistance

(Approx.)

Shift solenoid valve A

2

Ground

20 - 30 

Ω

Shift solenoid valve B

1

5 - 20 

Ω

SCIA3594E

DTC P0731 A/T 1ST GEAR FUNCTION

TM-61

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

1.

Remove control valve assembly. Refer to 

TM-191, "Control Valve Assembly and Accumulators"

.

-

Shift solenoid valve A

-

Shift solenoid valve B

2.

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

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace shift solenoid valve assembly.

3.

CHECK CONTROL VALVE

1.

Disassemble control valve assembly. Refer to 

TM-243, "Control Valve Assembly"

.

2.

Check to ensure that:

-

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

-

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

-

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

-

Hydraulic line is free from obstacles.

OK or NG

OK

>> GO TO 4.

NG

>> Repair control valve assembly.

4.

CHECK DTC

Perform 

TM-59, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> Check control valve again. If NG, repair or replace control valve assembly.

SCIA3595E

TM-62

< COMPONENT DIAGNOSIS >

[TYPE 1 (4AT: RE4F03B)]

DTC P0732 A/T 2ND GEAR FUNCTION

DTC P0732 A/T 2ND GEAR FUNCTION

Description

INFOID:0000000001694318

• This malfunction will not be detected while the OD OFF indicator lamp is indicating another self-diagnosis

malfunction.

• This malfunction is detected when the A/T does not shift into second 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, etc.

On Board Diagnosis Logic

INFOID:0000000001694319

• This is an OBD self-diagnostic item.
• Diagnostic trouble code “P0732 A/T 2ND GR FNCTN” with CONSULT-III is detected when A/T cannot be

shifted to the 2nd gear position even if electrical circuit is good.

• 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 (2nd) supposed by TCM, the slip ratio will be more than
normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
This malfunction will be caused when shift solenoid valve B is stuck open.

• Gear positions supposed by TCM are as follows:

In case of gear position with no malfunctions: 1, 2, 3 and 4 positions
In case of gear position with shift solenoid valve B stuck open: 4, 3*, 3 and 4 positions to each gear position
above
*: “P0732 A/T 2ND GR FNCTN” is detected.

Possible Cause

INFOID:0000000001694320

• Shift solenoid valve B
• Each clutch
• Hydraulic control circuit

DTC Confirmation Procedure

INFOID:0000000001694321

CAUTION:

• Always drive vehicle at a safe speed.
• If performing this “DTC Confirmation Procedure” again, always turn ignition switch OFF and wait at

least 10 seconds before continuing.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-III

1.

Start engine and select “DATA MONITOR” mode for “A/T” with CONSULT-III.

2.

Touch “START”.

3.

Make sure that output voltage of A/T fluid temperature sensor is within the range below.
FLUID TEMP SE: 0.4 - 1.5V
If out of range, drive the vehicle to decrease the voltage (warm up the fluid) or stop engine to increase the
voltage (cool down the fluid).

4.

Select “2ND GR FNCTN P0732” of “DTC WORK SUPPORT” mode for “A/T” with CONSULT-III and touch
“START”.

5.

Accelerate vehicle to 45 to 50 km/h (28 to 31 MPH) under the following conditions and release the accel-
erator pedal completely.
THROTTLE POSI: Less than 1.0/8
SLCT LVR POSI: “D” position

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)