Nissan Titan A60. Manual - part 417

 

  Index      Nissan     Nissan Titan A60 (2011 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  415  416  417  418   ..

 

 

Nissan Titan A60. Manual - part 417

 

 

EC-334

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0506 ISC SYSTEM

6. Perform 

EC-119, "Throttle Valve Closed Position Learning"

.

7. <Flexible Fuel Vehicle>

Perform 

EC-119, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"

.

8. Perform 

EC-120, "Idle Air Volume Learning"

.

>> INSPECTION END

P0507 ISC SYSTEM

EC-335

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0507 ISC SYSTEM

Description

INFOID:0000000006158772

NOTE:

If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.

The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let

into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is

varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects

the actual engine speed and sends a signal to the ECM.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value

memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.

The optimum value stored in the ECM is determined by taking into consideration various engine conditions,

such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan

operation, etc.). 

On Board Diagnosis Logic

INFOID:0000000006158773

DTC Confirmation Procedure

INFOID:0000000006158774

NOTE:

• If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step. 

• If the target idle speed is out of the specified value, perform 

EC-120, "Idle Air Volume Learning"

,

before conducting DTC Confirmation Procedure. For the target idle speed, refer to the 

EC-480

.

1. Turn ignition swich OFF and wait at least 10 seconds.
2. Turn ignition swich ON.
3. Turn ignition swich OFF and wait at least 10 seconds.
TESTING CONDITION:

• Before performing the following procedure,confirm that battery voltage is more than 11V at idle.

• Always perform the test at a temperature above 

10°C(14°F).

1. Open engine hood.

2. Start engine and warm it up to normal operating temperature.

3. Turn ignition switch OFF and wait at least 10 seconds.

4. Start engine and run it for at least 1 minute at idle speed.

5. Check 1st trip DTC.

6. If 1st trip DTC is detected, go to 

EC-335, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006158775

1.

CHECK PCV HOSE CONNECTION

Confirm that PCV hose is connected correctly.
OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace.

2.

CHECK INTAKE AIR LEAK

1. Start engine and let it idle.

2. Listen for an intake air leak after the mass air flow sensor.
OK or NG

OK

>> GO TO 3.

NG

>> Discover air leak location and repair.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0507
0507

Idle speed control system 
RPM higher than expected

The idle speed is more than the target idle 
speed by 200 rpm or more.

• Electric throttle control actuator
• Intake air leak
• PCV system

EC-336

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

P0507 ISC SYSTEM

3.

REPLACE ECM

1. Stop engine.

2. Replace ECM.

3. Perform initialization of NVIS(NATS) system and registration of all NVIS(NATS) ignition key IDs. Refer to

SEC-7, "ECM RE-COMMUNICATING FUNCTION : Special Repair Requirement"

.

4. Perform 

EC-119, "VIN Registration"

.

5. Perform 

EC-119, "Accelerator Pedal Released Position Learning"

.

6. Perform 

EC-119, "Throttle Valve Closed Position Learning"

.

7. <Flexible Fuel Vehicle>

Perform 

EC-119, "Ethanol Mixture Ratio Adaptation (Flexible Fuel Vehicle)"

.

8. Perform 

EC-120, "Idle Air Volume Learning"

.

>> INSPECTION END

P0550 PSP SENSOR

EC-337

< DTC/CIRCUIT DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0550 PSP SENSOR

Component Description

INFOID:0000000006158776

Power steering pressure (PSP) sensor (1) is installed to the power

steering high-pressure tube and detects a power steering load. This

sensor is a potentiometer which transforms the power steering load

into output voltage, and emits the voltage signal to the ECM. The

ECM controls the electric throttle control actuator and adjusts the

throttle valve opening angle to increase the engine speed and

adjusts the idle speed for the increased load.

On Board Diagnosis Logic

INFOID:0000000006158777

The MIL will not light up for this self-diagnosis.

NOTE:

If DTC P0550 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to

EC-345

.

DTC Confirmation Procedure

INFOID:0000000006158778

1. If DTC Confirmation Procedure has been previously conducted, always perform the following before con-

ducting the next step.

a. Turn ignition switch OFF and wait at least 10 seconds.
b. Turn ignition switch ON.
c. Turn ignition switch OFF and wait at least 10 seconds.
2. Start engine and let it idle for at least 5 seconds.
3. Check 1st trip DTC.
4. If 1st trip DTC is detected, go to 

EC-337, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000006158779

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

2. Loosen and retighten three ground screws on the body.

Refer to 

EC-139, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

BBIA0741E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0550
0550

Power steering pressure 
sensor circuit

An excessively low or high voltage from the 
sensor is sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted)

• Power steering pressure sensor

BBIA0354E

 

 

 

 

 

 

 

Content   ..  415  416  417  418   ..