Infiniti FX35, FX50 (S51). Manual - part 651

 

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Infiniti FX35, FX50 (S51). Manual - part 651

 

 

U0101 CAN COMM CIRCUIT

EC-145

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

U0101 CAN COMM CIRCUIT

Description

INFOID:0000000005236738

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:0000000005236739

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check DTC.

Is DTC detected?

YES

>>

EC-145, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236740

Go to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U0101

Lost communication 
with TCM

When ECM is not transmitting or receiving CAN 
communication signal of OBD (emission-related 
diagnosis) with TCM for 2 seconds or more.

• CAN communication line between 

TCM and ECM

• CAN communication line open or 

shorted

EC-146

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

U0164 CAN COMM CIRCUIT

U0164 CAN COMM CIRCUIT

Description

INFOID:0000000005236741

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:0000000005236742

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check DTC.

Is DTC detected?

YES

>>

EC-146, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236743

Go to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U0164

Lost communication 
with Unified meter and 
A/C amp.

When ECM is not transmitting or receiving CAN com-
munication signal of OBD (emission-related diagno-
sis) with Unified meter and A/C amp. for 2 seconds or 
more.

• CAN communication line between 

Unified meter and A/C amp. and 
ECM

• CAN communication line open or 

shorted

U1001 CAN COMM CIRCUIT

EC-147

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

U1001 CAN COMM CIRCUIT

Description

INFOID:0000000005236744

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:0000000005236745

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>>

EC-147, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005236746

Go to 

LAN-20, "Trouble Diagnosis Flow Chart"

.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U1001

CAN communication line

When ECM is not transmitting or receiving CAN 
communication signal other than OBD (emission-
related diagnosis) for 2 seconds or more.

• Harness or connectors

(CAN communication line is open or 
shorted)

EC-148

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0011, P0021 IVT CONTROL

P0011, P0021 IVT CONTROL

DTC Logic

INFOID:0000000005236747

DTC DETECTION LOGIC

NOTE:
If DTC P0011 or P0021 is displayed with DTC P0075 or P0081, first perform the trouble diagnosis for
DTC P0075, P0081. Refer to 

EC-162, "DTC 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 between 10 V and 16 V at
idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE-I

With CONSULT-III

1.

Turn ignition switch ON and select “DATA MONITOR” mode with CONSULT-III.

2.

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

3.

Maintain the following conditions for at least 6 consecutive seconds. Hold the accelerator pedal as steady
as possible.

4.

Let engine idle for 10 seconds.

5.

Check 1st trip DTC.

With GST

Follow the procedure “With CONSULT-III” above.

Is 1st trip DTC detected?

YES

>> Go to 

EC-149, "Diagnosis Procedure"

NO

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE-II

With CONSULT-III

1.

Select “DATA MONITOR” mode with CONSULT-III.

2.

Maintain the following conditions for at least 20 consecutive seconds.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0011

Intake valve timing 
(IVT) control perfor-
mance (bank 1)

There is a gap between angle of target and 
phase-control angle degree.

• Crankshaft position sensor
• Camshaft position sensor
• IVT control solenoid valve
• Accumulation of debris to the signal pick-up 

portion of the camshaft

• Timing chain installation
• Foreign matter caught in the oil groove for in-

take valve timing control

P0021

Intake valve timing 
(IVT) control perfor-
mance (bank 2)

ENG SPEED

1,200 - 2,000 rpm (A constant rotation is maintained)

COOLAN TEMP/S

More than 60

°

C (140

°

F)

Selector lever

P or N position

 

 

 

 

 

 

 

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