Infiniti FX35 / FX45. Manual - part 773

TROUBLE DIAGNOSIS

LAN-69

< SERVICE INFORMATION >

[CAN]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

N

O

P

SHORT CIRCUIT

Main Line Between TCM and Data Link Connector

INFOID:0000000001328650

INSPECTION PROCEDURE

1.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect the following harness connectors.

-

ECM

-

Harness connectors M82 and F102

4.

Check the continuity between the harness connector and the data link connector.

OK or NG

OK

>> • Present error: Check the following items again.

- Decision of CAN system type.
- Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU

list” included)].

- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the TCM and the data link connector.

NG

>> Repair the main line between the harness connector M82 and the data link connector.

Main Line Between Data Link Connector and Unified Meter and A/C Amp.

INFOID:0000000001328651

INSPECTION PROCEDURE

1.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect the following harness connectors.

-

ECM

-

Unified meter and A/C amp.

4.

Check the continuity between the data link connector and the unified meter and A/C amp. harness con-
nector.

Data link connector branch line circuit 

LAN-75, "Data Link Connector Branch Line Circuit"

Intelligent Key unit branch line circuit

LAN-76, "Intelligent Key Unit Branch Line Circuit"

LDW camera unit branch line circuit

LAN-76, "LDW Camera Unit Branch Line Circuit"

Steering angle sensor branch line circuit 

LAN-77, "Steering Angle Sensor Branch Line Circuit"

Unified meter and A/C amp. branch line circuit 

LAN-78, "Unified Meter and A/C Amp. Branch Line Circuit"

ABS actuator and electric unit (control unit) branch line circuit 

LAN-78, "ABS Actuator and Electric Unit (Control Unit) Branch 
Line Circuit"

ICC sensor branch line circuit

LAN-79, "ICC Sensor Branch Line Circuit"

Driver seat control unit branch line circuit

LAN-79, "Driver Seat Control Unit Branch Line Circuit"

IPDM E/R branch line circuit 

LAN-80, "IPDM E/R Branch Line Circuit"

Malfunction Area

Reference

Malfunction Area

Reference

CAN communication circuit

LAN-81, "CAN Communication Circuit"

Harness connector

Data link connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M82

14H

M5

6

Yes

15H

14

Yes

LAN-70

< SERVICE INFORMATION >

[CAN]

TROUBLE DIAGNOSIS

OK or NG

OK

>> • Present error: Check the following items again.

- Decision of CAN system type.
- Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU

list” included)].

- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the data link connector and the unified

meter and A/C amp.

NG

>> Repair the main line between the data link connector and the unified meter and A/C amp.

Main Line Between Unified Meter and A/C Amp. and ABS Actuator and Electric Unit 
(Control Unit)

INFOID:0000000001328652

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

-

Harness connector M41

-

Harness connector E211

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

Unified meter and A/C amp.

-

Harness connectors M41 and E211

2.

Check the continuity between the unified meter and A/C amp. harness connector and the harness con-
nector.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the main line between the unified meter and A/C amp. and the harness connector M41.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the connector of ABS actuator and electric unit (control unit).

2.

Check the continuity between the harness connector and the ABS actuator and electric unit (control unit)
harness connector.

Data link connector

Unified meter and A/C amp. harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M5

6

M55

1

Yes

14

11

Yes

Unified meter and A/C amp. harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M55

1

M41

29G

Yes

11

18G

Yes

TROUBLE DIAGNOSIS

LAN-71

< SERVICE INFORMATION >

[CAN]

C

D

E

F

G

H

I

J

L

M

A

B

LAN

N

O

P

OK or NG

OK

>> • Present error: Check the following items again.

- Decision of CAN system type.
- Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU

list” included)].

- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the unified meter and A/C amp. and the

ABS actuator and electric unit (control unit). 

NG

>> Repair the main line between the harness connector E211 and the ABS actuator and electric unit

(control unit).

Main Line Between ABS Actuator and Electric Unit (Control Unit) and Driver Seat Con-
trol Unit

INFOID:0000000001328653

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the following terminals and connectors for damage, bend and loose connection (connector side
and harness side).

-

Harness connector E205

-

Harness connector B5

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

ABS actuator and electric unit (control unit)

-

Harness connectors E205 and B5

2.

Check the continuity between the ABS actuator and electric unit (control unit) harness connector and the
harness connector.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the main line between the ABS actuator and electric unit (control unit) and the harness

connector E205.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the harness connectors B8 and B151.

2.

Check the continuity between the harness connectors.

Harness connector

ABS actuator and electric unit (control unit)

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E211

29G

E56

11

Yes

18G

15

Yes

ABS actuator and electric unit (control unit)

harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E56

11

E205

4

Yes

15

10

Yes

LAN-72

< SERVICE INFORMATION >

[CAN]

TROUBLE DIAGNOSIS

OK or NG

OK

>> • Present error: Check the following items again.

- Decision of CAN system type.
- Not received CONSULT-III data [SELF-DIAG RESULTS, CAN DIAG SUPPORT MNTR (“ECU

list” included)].

- Not copied from on-board diagnosis.
- Procedure for detecting root cause.
• Past error: Error was detected in the main line between the ABS actuator and electric unit (con-

trol unit) and the driver seat control unit. 

NG

>> Repair the main line between the harness connectors B5 and B8.

ECM Branch Line Circuit

INFOID:0000000001328654

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Check the terminals and connectors of the ECM for damage, bend and loose connection (unit side and
connector side).

OK or NG

OK

>> GO TO 2.

NG

>> Repair the terminal and connector.

2.

CHECK HARNESS FOR OPEN CIRCUIT

1.

Disconnect the connector of ECM.

2.

Check the resistance between the ECM harness connector terminals.

OK or NG

OK

>> GO TO 3.

NG

>> Repair the ECM branch line.

3.

CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to 

EC-141, "Diagnosis Procedure"

(VQ35DE), 

EC-719, "Diagnosis Procedure"

 (VK45DE).

OK or NG

OK

>> • Present error: Replace the ECM. Refer to 

EC-100, "Engine Control Component Parts Loca-

tion"

(VQ35DE), 

EC-677, "Engine Control Component Parts Location"

 (VK45DE).

• Past error: Error was detected in the ECM branch line.

NG

>> Repair the power supply and the ground circuit.

AWD Control Unit Branch Line Circuit

INFOID:0000000001328655

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

Harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

B5

4

B8

10

Yes

10

9

Yes

ECM harness connector

Resistance (

Ω

)

Connector No.

Terminal No.

M90

94

86

Approx. 108 – 132