Nissan Pathfinder (2010 year). Manual - part 276

 

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Nissan Pathfinder (2010 year). Manual - part 276

 

 

EC-300

< COMPONENT DIAGNOSIS >

[VQ40DE]

P050E COLD START CONTROL

Diagnosis Procedure

INFOID:0000000005550531

1.

PERFORM IDLE AIR VOLUME LEARNING

Perform 

EC-25, "Idle Air Volume Learning"

.

Is Idle Air Volume Learning carried out successfully?

YES

>> GO TO 2.

NO

>> Follow the instruction of Idle Air Volume Learning.

2.

CHECK INTAKE SYSTEM

Check for the cause of intake air volume lacking. Refer to the following.

• Crushed intake air passage

• Intake air passage clogging

• Clogging of throttle body
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part

3.

CHECK FUEL INJECTION SYSTEM FUNCTION

Perform DTC Confirmation Procedure for DTC P0171, P0174. Refer to 

EC-186, "DTC Confirmation Proce-

dure"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Go to 

EC-187, "Diagnosis Procedure"

 for DTC P0171, P0174.

4.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Erase DTC.

3. Perform DTC Confirmation Procedure.

See 

EC-299, "DTC Confirmation Procedure"

.

Is the 1st trip DTC P050E displayed again?

YES

>> GO TO 5.

NO

>> INSPECTION END

5.

REPLACE ECM

1. Replace ECM.

2. Go to 

EC-24, "Procedure After Replacing ECM"

.

>> INSPECTION END

2010 Pathfinder

P0550 PSP SENSOR

EC-301

< COMPONENT DIAGNOSIS >

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P0550 PSP SENSOR

Component Description

INFOID:0000000005257289

Power steering pressure (PSP) sensor 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:0000000005257290

The MIL will not illuminate for this diagnosis.

NOTE:

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

EC-309

.

DTC Confirmation Procedure

INFOID:0000000005257291

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-301, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005257292

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

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

EC-100, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

BBIA0552E

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

BBIA0539E

2010 Pathfinder

EC-302

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0550 PSP SENSOR

2.

CHECK PSP SENSOR POWER SUPPLY CIRCUIT

1. Disconnect power steering pressure (PSP) sensor harness con-

nector.

2. Turn ignition switch ON.

3. Check voltage between PSP sensor terminal 3 and ground with

CONSULT-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

3.

CHECK PSP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check harness continuity between PSP sensor terminal 1 and ECM terminal 67.

Refer to Wiring Diagram.

4. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK PSP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Check harness continuity between ECM terminal 12 and PSP sensor terminal 2.

2. Also check harness for short to ground and short to power.
OK or NG

OK

>> GO TO 5.

NG

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK PSP SENSOR

Refer to 

EC-303, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace PSP sensor.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

BBIA0552E

Voltage: Approximately 5V

PBIB1872E

Continuity should exist.

Continuity should exist.

2010 Pathfinder

P0550 PSP SENSOR

EC-303

< COMPONENT DIAGNOSIS >

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Component Inspection

INFOID:0000000005257293

POWER STEERING PRESSURE SENSOR

1. Reconnect all harness connectors disconnected.
2. Start engine and let it idle.
3. Check voltage between ECM terminal 12 and ground under the

following conditions.

Condition

Voltage

Steering wheel: being turned

0.5 - 4.5V

Steering wheel: not being turned

0.4 - 0.8V

MBIB0126E

2010 Pathfinder

EC-304

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0603 ECM POWER SUPPLY

P0603 ECM POWER SUPPLY

Component Description

INFOID:0000000005257294

Battery voltage is supplied to the ECM even when the ignition switch

is turned OFF for the ECM memory function of the DTC memory, the

air-fuel ratio feedback compensation value memory, the idle air vol-

ume learning value memory, etc.

On Board Diagnosis Logic

INFOID:0000000005257295

DTC Confirmation Procedure

INFOID:0000000005257296

1. If DTC Confirmation Procedure has been previously conducted, always perform the following procedure

before conducting 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. Turn ignition switch ON, wait at least 10 seconds.
3. Turn ignition switch OFF, wait at least 5 minutes.
4. Turn ignition switch ON, wait at least 10 seconds.
5. Repeat steps 2 to 3 for 5 times.
6. Check 1st trip DTC.
7. If 1st trip DTC is detected, go to 

EC-304, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005257297

1.

CHECK ECM POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect ECM harness connector.

3. Check voltage between ECM terminal 121 and ground with

CONSULT-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

PBIB1164E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0603
0603

ECM power supply cir-
cuit

ECM back up RAM system does not function 
properly.

• Harness or connectors

[ECM power supply (back up) circuit is 
open or shorted.]

• ECM

Voltage: Battery voltage

MBIB0026E

2010 Pathfinder

P0603 ECM POWER SUPPLY

EC-305

< COMPONENT DIAGNOSIS >

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Check the following.

• 20 A fuse(No.53)

• IPDM E/R harness connector E121

• Harness for open or short between ECM and battery

>> Repair open circuit in harness or connectors.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace harness or connectors.

4.

PERFORM DTC CONFIRMATION PROCEDURE

 

With CONSULT-III

1. Turn ignition switch ON.

2. Select “SELF DIAG RESULTS” mode with CONSULT-III.

3. Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.

See 

EC-304, "DTC Confirmation Procedure"

.

5. Is the 1st trip DTC P0603 displayed again?

 

With GST

1. Turn ignition switch ON.

2. Select Service $04 with GST.

3.

Perform DTC Confirmation Procedure.

See 

EC-304, "DTC Confirmation Procedure"

.

4. Is the 1st trip DTC P0603 displayed again?
Yes or No

Yes

>> GO TO 5.

No

>>

INSPECTION END

5.

REPLACE ECM

1. Replace ECM.

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

SEC-10, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

(with Intelligent Key system) or 

SEC-124, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT

: Special Repair Requirement"

 (without Intelligent Key system).

3. Perform 

EC-25, "VIN Registration"

.

4. Perform 

EC-25, "Accelerator Pedal Released Position Learning"

.

5. Perform 

EC-25, "Throttle Valve Closed Position Learning"

.

6. Perform 

EC-25, "Idle Air Volume Learning"

.

>>

INSPECTION END

2010 Pathfinder

EC-306

< COMPONENT DIAGNOSIS >

[VQ40DE]

P0605 ECM

P0605 ECM

Component Description

INFOID:0000000005257298

The ECM consists of a microcomputer and connectors for signal

input and output and for power supply. The ECM controls the engine.

On Board Diagnosis Logic

INFOID:0000000005257299

This self-diagnosis has one or two trip detection logic.

FAIL-SAFE MODE

ECM enters fail-safe mode when the malfunction A is detected.

DTC Confirmation Procedure

INFOID:0000000005257300

Perform PROCEDURE FOR MALFUNCTION A first. If the 1st trip DTC cannot be confirmed, perform

PROCEDURE FOR MALFUNCTION B. If there is no malfunction on PROCEDURE FOR MALFUNCTION

B, perform PROCEDURE FOR MALFUNCTION C.

NOTE:

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

ing the next step.

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

2. Turn ignition switch ON.

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

PROCEDURE FOR MALFUNCTION A

1. Turn ignition switch ON.

2. Check 1st trip DTC.

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

EC-307, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION B

 With CONSULT-III

1. Turn ignition switch ON and wait at least 1 second.

2. Check 1st trip DTC.

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

EC-307, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION C

 With CONSULT-III

1. Turn ignition switch ON and wait at least 1 second.

PBIB1164E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0605
0605

Engine control module

A)

ECM calculation function is malfunctioning.

• ECM

B)

ECM EEP-ROM system is malfunctioning.

C)

ECM self shut-off function is malfunctioning.

Detected items

Engine operation condition in fail-safe mode

Malfunction A

• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 

degrees) by the return spring.

• ECM deactivates ASCD operation.

2010 Pathfinder

P0605 ECM

EC-307

< COMPONENT DIAGNOSIS >

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2. Turn ignition switch OFF, wait at least 10 seconds, and then turn it ON.

3. Repeat step 2 for 32 times.

4. Check 1st trip DTC.

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

EC-307, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000005257301

1.

INSPECTION START

 

With CONSULT-III

1. Turn ignition switch ON.

2. Select “SELF DIAG RESULTS” mode with CONSULT-III.

3. Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.

See 

EC-306, "DTC Confirmation Procedure"

.

5. Is the 1st trip DTC P0605 displayed again?

 

With GST

1. Turn ignition switch ON.

2. Select Service $04 with GST.

3.

Perform DTC Confirmation Procedure.

See 

EC-306, "DTC Confirmation Procedure"

.

4. Is the 1st trip DTC P0605 displayed again?
Yes or No

Yes

>> GO TO 2.

No

>>

INSPECTION END

2.

REPLACE ECM

1. Replace ECM.

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

SEC-10, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement"

(with Intelligent Key system) or 

SEC-124, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT

: Special Repair Requirement"

 (without Intelligent Key system).

3. Perform 

EC-25, "VIN Registration"

.

4. Perform 

EC-25, "Accelerator Pedal Released Position Learning"

.

5. Perform 

EC-25, "Throttle Valve Closed Position Learning"

.

6. Perform 

EC-25, "Idle Air Volume Learning"

.

>>

INSPECTION END

2010 Pathfinder

 

 

 

 

 

 

 

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