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
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000003430152
1.
CHECK CAN COMMUNICATION LINE
Check CAN communication line. Refer to
.
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-
>> 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
.
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
.
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.
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