Infiniti FX35, FX50 (S51). Manual - part 1324

 

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Infiniti FX35, FX50 (S51). Manual - part 1324

 

 

LAN-238

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 6)]

CAN COMMUNICATION CIRCUIT 2

CAN COMMUNICATION CIRCUIT 2

Diagnosis Procedure

INFOID:0000000005577102

1.

CONNECTOR INSPECTION

1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect all the unit connectors on CAN communication circuit 2.

4.

Check terminals and connectors for damage, bend and loose connection.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair the terminal and connector.

2.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the data link connector terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Check the harness and repair the root cause.

3.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Check the harness and repair the root cause.

4.

CHECK CAN GATEWAY TERMINATION CIRCUIT

1.

Remove the CAN gateway.

2.

Check the resistance between the CAN gateway terminals.

Is the measurement value within the specification?

YES

>> GO TO 5.

NO

>> Replace the CAN gateway.

5.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. 

Inspection result

Reproduced>>GO TO 6.

Data link connector

Continuity

Connector No.

Terminal No.

M24

13

12

Not existed

Data link connector

Ground

Continuity

Connector No.

Terminal No.

M24

13

Not existed

12

Not existed

1

: CAN gateway

CAN gateway

Resistance (

)

Terminal No.

4

10

Approx. 108 – 132

6

12

Approx. 108 – 132

JPMIA0933ZZ

LAN

CAN COMMUNICATION CIRCUIT 2

LAN-239

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 6)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

6.

CHECK UNIT REPRODUCTION

Perform the reproduction test as per the following procedure for each unit.
1.

Turn the ignition switch OFF.

2.

Disconnect the battery cable from the negative terminal.

3.

Disconnect one of the unit connectors of CAN communication circuit 2.
NOTE:
CAN gateway have a termination circuit. Check other units first.

4.

Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results from interview with customer)” are reproduced. 
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms. 

Inspection result

Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace the unit whose connector was disconnected.

LAN-240

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 6)]

ITS COMMUNICATION CIRCUIT

ITS COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000005577103

1.

CHECK CAN DIAGNOSIS

Check the CAN diagnosis results from CONSULT-III to see that the CAN communication circuit has no mal-
function.
NOTE:
For identification of CAN communication circuit and ITS communication circuit, refer to 

LAN-58, "System Dia-

gram"

.

Is the CAN communication circuit normal?

YES

>> GO TO 2.

NO

>> Check and repair CAN communication circuit.

2.

CONNECTOR INSPECTION

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 (unit side and con-
nector side).

-

ICC sensor integrated unit

-

Accelerator pedal actuator

-

Harness connector E106

-

Harness connector M6

-

Harness connector M117

-

Harness connector B201

-

Brake booster control unit

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the terminal and connector.

3.

CHECK HARNESS CONTINUITY (OPEN CIRCUIT)

1.

Disconnect the following harness connectors.

-

ICC sensor integrated unit

-

Brake booster control unit

2.

Check the continuity between the ICC sensor integrated unit harness connector and the brake booster
control unit harness connector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair the ICC sensor integrated unit branch line. (ITS communication line). Refer to 

LAN-58,

"System Diagram"

.

4.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

1.

Disconnect the connector of accelerator pedal actuator.

2.

Check the continuity between the ICC sensor integrated unit harness connector terminals.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Check the harness and repair or replace (if shield line is short) the root cause.

ICC sensor integrated unit harness connector

Brake booster control unit harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E67

2

B250

14

Existed

5

5

Existed

ICC sensor integrated unit harness connector

Continuity

Connector No.

Terminal No.

E67

2

5

Not existed

LAN

ITS COMMUNICATION CIRCUIT

LAN-241

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 6)]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

5.

CHECK HARNESS CONTINUITY (SHORT CIRCUIT)

Check the continuity between the ICC sensor integrated unit harness connector and the ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Check the harness and repair or replace (if shield line is short) the root cause.

6.

CHECK TERMINATION CIRCUIT

1.

Remove the ICC sensor integrated unit and the brake booster control unit.

2.

Check the resistance between the ICC sensor integrated unit
terminals.

3.

Check the resistance between the brake booster control unit ter-
minals.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace the ICC sensor integrated unit and/or the brake booster control unit.

7.

CHECK SYMPTOM

Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced. 

Inspection result

Reproduced>>Replace the accelerator pedal actuator.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is

detected.

ICC sensor integrated unit harness connector

Ground

Continuity

Connector No.

Terminal No.

E67

2

Not existed

5

Not existed

1

: ICC sensor integrated unit and brake booster control unit

ICC sensor integrated unit

Resistance (

)

Terminal No.

2

5

Approx. 108 – 132

Brake booster control unit

Resistance (

)

Terminal No.

14

5

Approx. 108 – 132

JPMIA0933ZZ

 

 

 

 

 

 

 

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