Infiniti FX35, FX50 (S51). Manual - part 1308

LAN-174

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

ITS COMMUNICATION CIRCUIT

ITS COMMUNICATION CIRCUIT

Diagnosis Procedure

INFOID:0000000005576986

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-175

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 3)]

C

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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 (

Ω

)

Terminal No.

2

5

Approx. 108 – 132

Brake booster control unit

Resistance (

Ω

)

Terminal No.

14

5

Approx. 108 – 132

JPMIA0933ZZ

LAN-176

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

MAIN LINE BETWEEN DLC AND M&A CIRCUIT

DTC/CIRCUIT DIAGNOSIS

MAIN LINE BETWEEN DLC AND M&A CIRCUIT

Diagnosis Procedure

INFOID:0000000005576993

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.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (Past error)>>Error was detected in the main line between the data link connector and the unified meter

and A/C amp. 

NO

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

Data link connector

Unified meter and A/C amp. harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M24

6

M67

56

Existed

14

72

Existed

LAN

MAIN LINE BETWEEN M&A AND ABS CIRCUIT

LAN-177

< DTC/CIRCUIT DIAGNOSIS >

[CAN SYSTEM (TYPE 4)]

C

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MAIN LINE BETWEEN M&A AND ABS CIRCUIT

Diagnosis Procedure

INFOID:0000000005576997

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 M6

-

Harness connector E106

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> 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 M6 and E106

2.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair the main line between the unified meter and A/C amp. and the harness connector M6.

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.

Is the inspection result normal?

YES (Present error)>>Check CAN system type decision again.
YES (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). 

NO

>> Repair the main line between the harness connector E106 and the ABS actuator and electric unit

(control unit).

Unified meter and A/C amp. harness connector

Harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

M67

56

M6

47

Existed

72

48

Existed

Harness connector

ABS actuator and electric unit (control unit)

harness connector

Continuity

Connector No.

Terminal No.

Connector No.

Terminal No.

E106

47

E41

35

Existed

48

14

Existed