Nissan Pathfinder (2006 year). Manual — part 202

DTC P0603 ECM POWER SUPPLY

EC-475

C

D

E

F

G

H

I

J

K

L

M

A

EC

2006 Pathfinder

4.

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT-II

1.

Turn ignition switch ON.

2.

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

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See

EC-472, "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-472, "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

BL-102, "ECM Re-communicating Function"

.

3.

Perform

EC-76, "VIN Registration"

.

4.

Perform

EC-77, "Accelerator Pedal Released Position Learning"

.

5.

Perform

EC-77, "Throttle Valve Closed Position Learning"

.

6.

Perform

EC-77, "Idle Air Volume Learning"

.

>> INSPECTION END

EC-476

DTC P0605 ECM

2006 Pathfinder

DTC P0605 ECM

PFP:23710

Component Description

UBS00KBC

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

UBS00KBD

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

UBS00KBE

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 turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

PROCEDURE FOR MALFUNCTION A

With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

If 1st trip DTC is detected, go to

EC-477, "Diagnostic Procedure"

.

With GST

Follow the procedure “With CONSULT-II” above.

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.

SEF058Y

DTC P0605 ECM

EC-477

C

D

E

F

G

H

I

J

K

L

M

A

EC

2006 Pathfinder

PROCEDURE FOR MALFUNCTION B

With CONSULT-II

1.

Turn ignition switch ON and wait at least 1 second.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

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

4.

If 1st trip DTC is detected, go to

EC-477, "Diagnostic Procedure"

.

With GST

Follow the procedure “With CONSULT-II” above.

PROCEDURE FOR MALFUNCTION C

With CONSULT-II

1.

Turn ignition switch ON and wait at least 1 second.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

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

4.

Repeat step 3 for 32 times.

5.

If 1st trip DTC is detected, go to

EC-477, "Diagnostic Procedure"

.

With GST

Follow the procedure “With CONSULT-II” above.

Diagnostic Procedure

UBS00KBF

1.

INSPECTION START

With CONSULT-II

1.

Turn ignition switch ON.

2.

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

3.

Touch “ERASE”.

4.

Perform DTC Confirmation Procedure.
See

EC-476, "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-476, "DTC Confirmation Procedure"

.

4.

Is the 1st trip DTC P0605 displayed again?

Yes or No

Yes

>> GO TO 2.

No

>> INSPECTION END

SEF058Y

SEF058Y

EC-478

DTC P0605 ECM

2006 Pathfinder

2.

REPLACE ECM

1.

Replace ECM.

2.

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

BL-102, "ECM Re-communicating Function"

.

3.

Perform

EC-76, "VIN Registration"

.

4.

Perform

EC-77, "Accelerator Pedal Released Position Learning"

.

5.

Perform

EC-77, "Throttle Valve Closed Position Learning"

.

6.

Perform

EC-77, "Idle Air Volume Learning"

.

>> INSPECTION END

DTC P0643 SENSOR POWER SUPPLY

EC-479

C

D

E

F

G

H

I

J

K

L

M

A

EC

2006 Pathfinder

DTC P0643 SENSOR POWER SUPPLY

PFP:18919

On Board Diagnosis Logic

UBS00KDY

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 lights up.

DTC Confirmation Procedure

UBS00KDZ

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for 1 second.

4.

If DTC is detected, go to

EC-482, "Diagnostic Procedure"

.

WITH GST

Follow the procedure “WITH CONSULT-II” above.

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

P0643
0643

Sensor power supply
circuit short

ECM detects a 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
shorted.)
(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.

SEF058Y

EC-480

DTC P0643 SENSOR POWER SUPPLY

2006 Pathfinder

Wiring Diagram

UBS00KE0

BBWA1764E

DTC P0643 SENSOR POWER SUPPLY

EC-481

C

D

E

F

G

H

I

J

K

L

M

A

EC

2006 Pathfinder

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

48

SB

Sensor power supply
(EVAP control system pres-
sure sensor)

[Ignition switch: ON]

Approximately 5V

49

P

Sensor power supply
(Refrigerant pressure sen-
sor/Battery current sensor)

[Ignition switch: ON]

Approximately 5V

68

G

Sensor power supply
(Power steering pressure
sensor)

[Ignition switch: ON]

Approximately 5V

82

B

Sensor ground
(APP sensor 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

83

B

Sensor ground
(APP sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

90

L

Sensor power supply
(APP sensor 1)

[Ignition switch: ON]

Approximately 5V

91

G

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5V

98

GR

Accelerator pedal position
sensor 2

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully released

0.28 - 0.48V

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully depressed

More than 2.0V

106

R

Accelerator pedal position
sensor 1

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully released

0.65 - 0.87V

[Ignition switch: ON]

●

Engine: Stopped

●

Accelerator pedal: Fully depressed

More than 4.3V

EC-482

DTC P0643 SENSOR POWER SUPPLY

2006 Pathfinder

Diagnostic Procedure

UBS00KE1

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

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

EC-151, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK ACCELERATOR PEDAL POSITION SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect accelerator pedal position (APP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between APP sensor terminal 2 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 3.

BBIA0539E

Voltage: Approximately 5V

BBIA0556E

PBIB2608E