Infiniti EX35. Manual - part 340

U1100 CAN COMM CIRCUIT (ICC UNIT)

BRC-75

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

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U1100 CAN COMM CIRCUIT (ICC UNIT)

Description

INFOID:0000000003441417

The ABS actuator and electric unit (control unit) and the ICC sensor integrated unit exchange signals via the
CAN communication line.

DTC Logic

INFOID:0000000003430151

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC REPRODUCTION PROCEDURE

1.

Turn the ignition switch ON.

2.

Perform ABS actuator and electric unit (control unit) self-diagnosis.

Is DTC “U1100” detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-75, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003430152

1.

CHECK CAN COMMUNICATION LINE

Check CAN communication line. Refer to 

BRC-74, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace damaged parts.

2.

CHECK ICC INTEGRATED UNIT

Perform ICC integrated unit self-diagnosis.

Is the inspection result normal?

YES

>> ABS actuator and electric unit (control unit).

NO

>> Repair or replace damaged parts.

Special Repair Requirement

INFOID:0000000003441416

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform the neutral position adjustment for the steering angle sensor, when replacing the ABS actua-
tor and electric unit (control unit). Refer to 

BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-

TRAL POSITION : Description"

.

>> END

DTC

Display item

Malfunction detected condition

Possible cause

U1100

ACC COMM CIRCUIT

When there is a malfunction in the CAN communication 
circuit or ICC sensor integrated unit.

• CAN communication line
• ABS actuator and electric unit 

(control unit)

• ICC integrated unit

BRC-76

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Description

INFOID:0000000003738692

Supplies power to ABS actuator and electric unit (control unit).

Diagnosis Procedure

INFOID:0000000003738693

1.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY

1.

Turn the ignition switch OFF.

2.

Disconnect ABS actuator and electric unit (control unit) harness connector.

3.

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

4.

Turn the ignition switch ON.

CAUTION:

Never start the engine.

5.

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform the trouble diagnosis for power supply circuit.

2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY

1.

Turn the ignition switch OFF.

2.

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

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Perform the trouble diagnosis for power supply circuit.

3.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND

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

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace damaged parts.

ABS actuator and electric unit (control unit)

—

Voltage

Connector

Terminal

E41

28

Ground

Approx. 0 V

ABS actuator and electric unit (control unit)

—

Voltage 

Connector

Terminal

E41

28

Ground

Battery voltage

ABS actuator and electric unit (control unit)

—

Voltage

Connector

Terminal

E41

3

Ground

Battery voltage

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

E41

1

Ground

Existed

4

PARKING BRAKE SWITCH

BRC-77

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

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PARKING BRAKE SWITCH

Component Function Check

INFOID:0000000003132965

1.

CHECK PARKING BRAKE SWITCH OPERATION

Operate the parking brake pedal. Then check that the brake warning lamp in the combination meter turns ON/
OFF correctly.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Proceed to diagnosis procedure. Refer to 

BRC-77, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003132966

1.

CHECK PARKING BRAKE SWITCH

Check parking brake switch. Refer to 

BRC-77, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace parking brake switch.

2.

CHECK COMBINATION METER

Check if the indication and operation of combination meter are normal. Refer to 

MWI-38, "Diagnosis Descrip-

tion"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace combination meter.

3.

CHECK DATA MONITOR

On “DATA MONITOR”, select “PARK BRAKE SW” and perform the parking brake switch inspection.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Check unified meter and A/C amp. Refer to 

MWI-40, "CONSULT-III Function (METER/M&A)"

.

Component Inspection

INFOID:0000000003132967

1.

CHECK PARKING BRAKE SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect parking brake switch connector.

3.

Check the continuity between parking brake switch connector and ground.

Is the inspection result normal?

Condition

Brake warning lamp illumination status

When the parking brake pedal is operation

ON

When the parking brake pedal is not oper-
ation.

OFF

Condition

PARK BRAKE SW (DATA MONITOR)

Parking brake switch is active

ON

Parking brake switch is inactive

OFF

Parking brake switch

—

Condition

Continuity

Connector

Terminal

E107

1

Ground

When the parking brake switch is operated.

Existed

When the parking brake switch is not operated.

Not existed

BRC-78

< COMPONENT DIAGNOSIS >

[VDC/TCS/ABS]

PARKING BRAKE SWITCH

YES

>> INSPECTION END

NO

>> Replace parking brake switch.