Nissan Pathfinder (2012 year). Manual - part 278

 

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Nissan Pathfinder (2012 year). Manual - part 278

 

 

P0550 PSP SENSOR

EC-305

< DTC/CIRCUIT DIAGNOSIS >

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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 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-306, "Component Inspection"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace PSP sensor. Refer to 

ST-25, "Removal and Installation"

.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-37, "Intermittent Incident"

.

>>

INSPECTION END

BBIA0552E

Voltage: Approximately 5V

PBIB1872E

Continuity should exist.

Continuity should exist.

August 2012

2012 Pathfinder

EC-306

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0550 PSP SENSOR

Component Inspection

INFOID:0000000007358232

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

August 2012

2012 Pathfinder

P0603 ECM POWER SUPPLY

EC-307

< DTC/CIRCUIT DIAGNOSIS >

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P0603 ECM POWER SUPPLY

Component Description

INFOID:0000000007358233

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:0000000007358234

DTC Confirmation Procedure

INFOID:0000000007358235

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-307, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358236

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 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

August 2012

2012 Pathfinder

EC-308

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0603 ECM POWER SUPPLY

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

1. Turn ignition switch ON.

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

3. Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.

See 

EC-307, "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-307, "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-120, "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

August 2012

2012 Pathfinder

P0605 ECM

EC-309

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P0605 ECM

Component Description

INFOID:0000000007358237

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:0000000007358238

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:0000000007358239

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-310, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION B

 With CONSULT

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-310, "Diagnosis Procedure"

.

PROCEDURE FOR MALFUNCTION C

 With CONSULT

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.

August 2012

2012 Pathfinder

EC-310

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0605 ECM

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-310, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358240

1.

INSPECTION START

 

With CONSULT

1. Turn ignition switch ON.

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

3. Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.

See 

EC-309, "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-309, "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-120, "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

August 2012

2012 Pathfinder

P0607 ECM

EC-311

< DTC/CIRCUIT DIAGNOSIS >

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P0607 ECM

Description

INFOID:0000000007358241

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-

tiplex communication line with high data communication speed and excellent error detection ability. Many elec-

tronic control units are equipped onto a vehicle, and each control unit shares information and links with other

control units during operation (not independent). In CAN communication, control units are connected with 2

communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.

Each control unit transmits/receives data but selectively reads required data only.

On Board Diagnosis Logic

INFOID:0000000007358242

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

INFOID:0000000007358243

1. Turn ignition switch ON.
2. Check DTC.
3. If DTC is detected, go to 

EC-311, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358244

1.

INSPECTION START

 

With CONSULT

1. Turn ignition switch ON.

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

3. Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.

See 

EC-311, "DTC Confirmation Procedure"

.

5. Is the DTC P0607 displayed again?

 

With GST

1. Turn ignition switch ON.

2. Select “Service $04” with GST.

3.

Perform DTC Confirmation Procedure.

See 

EC-311, "DTC Confirmation Procedure"

.

4. Is the DTC P0607 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-120, "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

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U0607
0607

CAN communication bus

When detecting error during the initial diagno-
sis of CAN controller of ECM.

• ECM

August 2012

2012 Pathfinder

EC-312

< DTC/CIRCUIT DIAGNOSIS >

[VQ40DE]

P0643 SENSOR POWER SUPPLY

P0643 SENSOR POWER SUPPLY

On Board Diagnosis Logic

INFOID:0000000007358245

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode and the MIL illuminates. 

DTC Confirmation Procedure

INFOID:0000000007358246

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.

TESTING CONDITION:

Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

1. Start engine and let it idle for 1 second.
2. Check 1st trip DTC.
3. If DTC is detected, go to 

EC-312, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000007358247

1.

CHECK GROUND CONNECTIONS

1. Turn ignition switch OFF.

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

EC-97, "Ground Inspection"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0643
0643

Sensor power supply 
circuit short

ECM detects that the voltage of power 
source for sensor is excessively low or high.

• Harness or connectors

(APP sensor 1 circuit is shorted.)
(PSP sensor circuit is shorted.)
(Refrigerant pressure sensor circuit is short-
ed.)
(Battery current sensor circuit is shorted.)
(EVAP control system pressure sensor circuit 
is shorted.)

• Accelerator pedal position sensor

(APP sensor 1)

• EVAP control system pressure sensor
• Power steering pressure sensor
• Refrigerant pressure sensor
• Battery current sensor

Engine operation condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return 
spring.

BBIA0539E

August 2012

2012 Pathfinder

 

 

 

 

 

 

 

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