Infiniti FX35 / FX45. Manual - part 346

 

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Infiniti FX35 / FX45. Manual - part 346

 

 

POWER SUPPLY AND GROUND CIRCUIT

EC-145

< SERVICE INFORMATION >

[VQ35DE]

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Electronically controlled circuits are very sensitive to proper grounding. A loose or corroded ground can drasti-
cally affect an electronically controlled circuit. A poor or corroded ground can easily affect the circuit. Even
when the ground connection looks clean, there can be a thin film of rust on the surface.
When inspecting a ground connection follow these rules:
• Remove the ground bolt or screw.
• Inspect all mating surfaces for tarnish, dirt, rust, etc.
• Clean as required to assure good contact.
• Reinstall bolt or screw securely.
• Inspect for “add-on” accessories which may be interfering with the ground circuit.
• If several wires are crimped into one ground eyelet terminal, check for proper crimps. Make sure all of the

wires are clean, securely fastened and providing a good ground path. If multiple wires are cased in one eye-
let make sure no ground wires have excess wire insulation.

For detailed ground distribution information, refer to 

PG-26, "Ground Distribution"

.

PBIB1870E

EC-146

< SERVICE INFORMATION >

[VQ35DE]

DTC U1000, U1001 CAN COMMUNICATION LINE

DTC U1000, U1001 CAN COMMUNICATION LINE

Description

INFOID:0000000001325949

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:0000000001325950

*1: This self-diagnosis has the one trip detection logic.

*2: The MIL will not light up for this self-diagnosis.

*3: This self-diagnosis has the one or two trip detection logic. (Models with ICC)

DTC Confirmation Procedure

INFOID:0000000001325951

1.

Turn ignition switch ON and wait at least 3 seconds.

2.

Check 1st tip DTC.

3.

If 1st trip DTC is detected, go to 

EC-147, "Diagnosis Procedure"

.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

U1000*

1

1000*

1

CAN communication 
line

• When ECM is not transmitting or receiving 

CAN communication signal of OBD (emission-
related diagnosis) for 2 seconds or more.

• Harness or connectors

(CAN communication line is open or 
shorted)

U1001*

2

 *

3

1001*

2

 *

3

• When ECM is not transmitting or receiving 

CAN communication signal other than OBD 
(emission-related diagnosis) for 2 seconds or 
more.

DTC U1000, U1001 CAN COMMUNICATION LINE

EC-147

< SERVICE INFORMATION >

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Wiring Diagram

INFOID:0000000001325952

Diagnosis Procedure

INFOID:0000000001325953

Go to 

LAN-43, "CAN System Specification Chart"

.

TBWM1378E

EC-148

< SERVICE INFORMATION >

[VQ35DE]

DTC U1010 CAN COMMUNICATION

DTC U1010 CAN COMMUNICATION

Description

INFOID:0000000001325954

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:0000000001325955

This self-diagnosis has the one trip detection logic.

DTC Confirmation Procedure

INFOID:0000000001325956

1.

Turn ignition switch ON.

2.

Check DTC.

3.

If DTC is detected, go to 

EC-148, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000001325957

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-148, "DTC Confirmation Procedure"

.

5.

Is the DTC U1010 displayed again?

 With GST

1.

Turn ignition switch ON.

2.

Select Service $04 with GST.

3.

Perform DTC Confirmation Procedure.
See 

EC-148, "DTC Confirmation Procedure"

.

4.

Is the DTC U1010 displayed again?

Yes or No

Yes

>> GO TO 2.

No

>> INSPECTION END

2.

REPLACE ECM

1.

Replace ECM.

2.

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

BL-187, "ECM Re-Communicating Function"

.

3.

Perform 

EC-84, "VIN Registration"

.

4.

Perform 

EC-85, "Accelerator Pedal Released Position Learning"

.

5.

Perform 

EC-85, "Throttle Valve Closed Position Learning"

.

6.

Perform 

EC-85, "Idle Air Volume Learning"

.

>> INSPECTION END

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

U1010
1010

CAN communication bus

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

• ECM

 

 

 

 

 

 

 

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