Nissan Titan A60. Instruction — part 925

TM-88

< DTC/CIRCUIT DIAGNOSIS >

P1757 FRONT BRAKE SOLENOID

P1757 FRONT BRAKE SOLENOID

Description

INFOID:0000000006159369

Front brake solenoid valve is controlled by the TCM in response to signals sent from the transmission range

switch, output speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then

be shifted to the optimum position.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000006159370

On Board Diagnosis Logic

INFOID:0000000006159371

• This is an OBD-II self-diagnostic item.

• Diagnostic trouble code “P1757” with CONSULT-III or 6th judgment flicker without CONSULT-III is detected

under the following conditions.

- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.

- When TCM detects as irregular by comparing target value with monitor value.

Possible Cause

INFOID:0000000006159372

• Harness or connectors

(The solenoid circuit is open or shorted.)

• Front brake solenoid valve

DTC Confirmation Procedure

INFOID:0000000006159373

CAUTION:

Always drive vehicle at a safe speed.

NOTE:

If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”

and wait at least 10 seconds before performing the next test.

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

WITH CONSULT-III

1. Turn ignition switch “ON”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Start engine.

4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

ACCELE POSI: 1.5/8 - 2.0/8

SLCT LVR POSI: “D” position

GEAR: 3rd

⇒ 4th (FR/B ON/OFF)

Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving

conditions required for this test.

5. If DTC is detected go to

TM-88, "Diagnosis Procedure"

.

WITH GST

Follow the procedure “With CONSULT-III”.

Diagnosis Procedure

INFOID:0000000006159374

1.

CHECK INPUT SIGNAL

With CONSULT-III

1. Turn ignition switch “ON”.

2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Start engine.

4. Read out the value of “FR/B SOLENOID” while driving.

Item name

Condition

Display value (Approx.)

FR/B SOLENOID

Front brake engaged. Refer to

TM-88

0.6 - 0.8 A

Front brake disengaged. Refer to

TM-88

0 - 0.05 A

P1757 FRONT BRAKE SOLENOID

TM-89

< DTC/CIRCUIT DIAGNOSIS >

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

TM-101, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following items:

• The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG

OK

>> Replace the control valve with TCM. Refer to

TM-197, "Control Valve with TCM"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform “DTC Confirmation Procedure”.

• Refer to

TM-88, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

Item name

Condition

Display value (Approx.)

FR/B SOLENOID

Front brake engaged. Refer to

TM-88

0.6 - 0.8 A

Front brake disengaged. Refer to

TM-88

0 - 0.05 A

TM-90

< DTC/CIRCUIT DIAGNOSIS >

P1762 DIRECT CLUTCH SOLENOID

P1762 DIRECT CLUTCH SOLENOID

Description

INFOID:0000000006159375

Direct clutch solenoid valve is controlled by the TCM in response to signals sent from the transmission range

switch, output speed sensor and accelerator pedal position sensor (throttle position sensor). Gears will then

be shifted to the optimum position.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000006159376

On Board Diagnosis Logic

INFOID:0000000006159377

• This is an OBD-II self-diagnostic item.

• Diagnostic trouble code “P1762” with CONSULT-III or 2nd judgment flicker without CONSULT-III is detected

under the following conditions.

- When TCM detects an improper voltage drop when it tries to operate the solenoid valve.

- When TCM detects as irregular by comparing target value with monitor value.

Possible Cause

INFOID:0000000006159378

• Harness or connectors

(The solenoid circuit is open or shorted.)

• Direct clutch solenoid valve

DTC Confirmation Procedure

INFOID:0000000006159379

NOTE:

If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”

and wait at least 10 seconds before performing the next test.

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

WITH CONSULT-III

1. Turn ignition switch “ON”. (Do not start engine.)

2. Select “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Start engine.

4. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

ACCELE POSI: 1.5/8 - 2.0/8

SLCT LVR POSI: “D” position

GEAR: 1st

⇒ 2nd (D/C ON/OFF)

Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving

conditions required for this test.

5. If DTC is detected, go to

TM-90, "Diagnosis Procedure"

.

WITH GST

Follow the procedure “With CONSULT-III”.

Diagnosis Procedure

INFOID:0000000006159380

1.

CHECK INPUT SIGNAL

With CONSULT-III

1. Turn ignition switch “ON”.

2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-III.

3. Start the engine.

4. Read out the value of “D/C SOLENOID” while driving.

Item name

Condition

Display value (Approx.)

D/C SOLENOID

Direct clutch disengaged. Refer to

TM-90

0.6 - 0.8 A

Direct clutch engaged. Refer to

TM-90

0 - 0.05 A

P1762 DIRECT CLUTCH SOLENOID

TM-91

< DTC/CIRCUIT DIAGNOSIS >

C

E

F

G

H

I

J

K

L

M

A

B

TM

N

O

P

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 2.

2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT

Check TCM power supply and ground circuit. Refer to

TM-101, "Diagnosis Procedure"

.

OK or NG

OK

>> GO TO 3.

NG

>> Repair or replace damaged parts.

3.

DETECT MALFUNCTIONING ITEM

Check the following items:

• The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG

OK

>> Replace the control valve with TCM. Refer to

TM-197, "Control Valve with TCM"

.

NG

>> Repair or replace damaged parts.

4.

CHECK DTC

Perform “DTC Confirmation Procedure”.

• Refer to

TM-90, "DTC Confirmation Procedure"

.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

Item name

Condition

Display value (Approx.)

D/C SOLENOID

Direct clutch disengaged. Refer to

TM-90

0.6 - 0.8 A

Direct clutch engaged. Refer to

TM-90

0 - 0.05 A