Infiniti FX35, FX50 (S51). Manual - part 704

 

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Infiniti FX35, FX50 (S51). Manual - part 704

 

 

P0605 ECM

EC-357

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

YES

>> Go to 

EC-357, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236946

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC Confirmation Procedure.
See 

EC-356, "DTC Logic"

.

Is the 1st trip DTC P0605 displayed again?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE ECM

1.

Replace ECM.

2.

Go to 

EC-23, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-

ment"

.

>> INSPECTION END

EC-358

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0607 ECM

P0607 ECM

Description

INFOID:0000000005236947

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.

DTC Logic

INFOID:0000000005236948

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-358, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236949

1.

INSPECTION START

1.

Turn ignition switch ON.

2.

Erase DTC.

3.

Perform DTC Confirmation Procedure.
See 

EC-358, "DTC Logic"

.

4.

Check DTC.

Is the DTC P0607 displayed again?

YES

>> GO TO 2.

NO

>> INSPECTION END

2.

REPLACE ECM

1.

Replace ECM.

2.

Go to 

EC-23, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-

ment"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0607

CAN communication bus

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

• ECM

P0643 SENSOR POWER SUPPLY

EC-359

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0643 SENSOR POWER SUPPLY

DTC Logic

INFOID:0000000005236950

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
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 10 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-359, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236951

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-39, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK ACCELERATOR PEDAL POSITION (APP) SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect APP sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between APP sensor harness connector and ground.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0643

Sensor power supply 
circuit short

ECM detects that the voltage of 
power source for sensor is exces-
sively low or high.

• Harness or connectors

[Accelerator pedal position (APP) sensor 1 circuit is 
shorted.]
[Throttle position (TP) sensor circuit is shorted.]
[Camshaft position (CMP) sensor (bank 1) circuit is 
shorted.]
[Exhaust valve timing (EVT) control position sensor 
(bank 1) circuit is shorted.]
[Power steering pressure (PSP) sensor circuit is short-
ed.]

• APP sensor
• TP sensor
• CMP sensor (bank 1)
• EVT control position sensor (bank 1)
• PSP sensor

EC-360

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0643 SENSOR POWER SUPPLY

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 3.

3.

CHECK SENSOR POWER SUPPLY CIRCUITS

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK COMPONENTS

Check the following.
• CMP sensor (bank 1) (Refer to 

EC-277, "Component Inspection"

.)

• EVT control position sensor (bank 1) (Refer to 

EC-369, "Component Inspection"

.)

• PSP sensor (Refer to 

EC-352, "Component Inspection"

.)

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace malfunctioning component.

5.

CHECK THROTTLE POSITION (TP) SENSOR

Refer to 

EC-191, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> GO TO 6.

6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Go to 

EC-191, "Special Repair Requirement"

.

>> INSPECTION END

7.

CHECK APP SENSOR

Refer to 

EC-444, "Component Inspection"

.

APP sensor

Ground

Voltage (V)

Connector

Terminal

E112

(Without ICC)

5

Ground

Approx. 5

E116

(With ICC)

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F101

43

Electric throttle control actuator (bank 2)

F27

1

44

Electric throttle control actuator (bank 1)

F6

6

F102

60

Camshaft position (CMP) sensor (bank 
1)

F5

1

Exhaust valve timing (EVT) control posi-
tion sensor (bank 1)

F4

1

Power steering pressure (PSP) sensor

F35

3

M107

99

APP sensor

E112

(Without ICC)

5

E116

(With ICC)

 

 

 

 

 

 

 

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