Infiniti FX35, FX50 (S51). Manual — part 256
C1109 POWER AND GROUND SYSTEM
BRC-55
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C
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C1109 POWER AND GROUND SYSTEM
Description
INFOID:0000000005234508
Supplies electric power to the ABS actuator and electric unit (control unit).
DTC Logic
INFOID:0000000005234509
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
1.
Turn the ignition switch OFF to ON.
2.
Perform self-diagnosis for “ABS” with CONSULT-III.
Is DTC “C1109” detected?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005234510
1.
CHECK CONNECTOR
1.
Turn the ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) harness connector.
3.
Check terminal for deformation, disconnection, looseness, etc.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY
1.
Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
2.
Turn the ignition switch ON.
CAUTION:
Never start the engine.
3.
Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY CIRCUIT
1.
Turn the ignition switch OFF.
2.
Check 10A fusible link (45).
3.
Disconnect IPDM E/R harness connector.
DTC
Display item
Malfunction detected condition
Possible cause
C1109
BATTERY VOLTAGE
[ABNORMAL]
When the ABS actuator and electric unit (control unit)
power supply voltage is lower than normal.
• Harness or connector
• ABS actuator and electric unit
(control unit)
ABS actuator and electric unit (control unit)
—
Condition
Voltage
Connector
Terminal
E41
28
Ground
Ignition switch: OFF
Approx. 0V
ABS actuator and electric unit (control unit)
—
Condition
Voltage
Connector
Terminal
E41
28
Ground
Ignition switch: ON
Battery voltage
BRC-56
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C1109 POWER AND GROUND SYSTEM
4.
Check continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R
harness connector.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for ignition power supply circuit. Refer to
.
NO
>> Repair or replace error-detected parts.
4.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> Replace ABS actuator and electric unit (control unit).
NO
>> Repair or replace error-detected parts. (Check ABS earth bolt for tightness and corrosion.)
Special Repair Requirement
INFOID:0000000005528306
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-9, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-
>> END
ABS actuator and electric unit (control unit)
IPDM E/R
Continuity
Connector
Terminal
Connector
Terminal
E41
28
E5
25
Existed
ABS actuator and electric unit (control unit)
—
Continuity
Connector
Terminal
E41
1
Ground
Existed
4
C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
BRC-57
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
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C1110, C1153, C1170 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL
UNIT)
DTC Logic
INFOID:0000000005234512
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
1.
Turn the ignition switch ON.
2.
Perform self-diagnosis for “ABS” with CONSULT-III.
Is DTC “C1110”, “C1153” or “C1170” detected?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005234513
1.
REPLACE ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
CAUTION:
Replace ABS actuator and electric unit (control unit) when self-diagnostic result shows items other
than those applicable.
>> Replace ABS actuator and electric unit (control unit).
Special Repair Requirement
INFOID:0000000005528307
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-9, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-
>> END
DTC
Display item
Malfunction detected condition
Possible cause
C1110
CONTROLLER FAILURE
When there is an internal malfunction in the ABS actuator
and electric unit (control unit).
ABS actuator and electric unit
(control unit)
C1153
EMERGENCY BRAKE
When ABS actuator and electric unit (control unit) is mal-
functioning. (Pressure increase is too much or too little)
C1170
VARIANT CODING
In a case where VARIANT CODING is different.
BRC-58
< DTC/CIRCUIT DIAGNOSIS >
[VDC/TCS/ABS]
C1111 ABS MOTOR, MOTOR RELAY SYSTEM
C1111 ABS MOTOR, MOTOR RELAY SYSTEM
Description
INFOID:0000000005234515
PUMP
The pump returns the brake fluid stored in the reservoir to the master cylinder by reducing the pressure.
MOTOR
The motor drives the pump according to the signals transmitted by the ABS actuator and electric unit (control
unit).
MOTOR RELAY
Activates or deactivates motor according to the signals transmitted by the ABS actuator and electric unit (con-
trol unit).
DTC Logic
INFOID:0000000005234516
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
DTC REPRODUCTION PROCEDURE
1.
Turn the ignition switch ON.
2.
Perform self-diagnosis for “ABS” with CONSULT-III.
Is DTC “C1111” detected?
YES
>> Proceed to diagnosis procedure. Refer to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005234517
1.
CHECK CONNECTOR
1.
Turn the ignition switch OFF.
2.
Disconnect ABS actuator and electric unit (control unit) harness connector.
3.
Check terminal for deformation, disconnect, looseness, etc.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK ABS MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT
Check the voltage between the ABS actuator and electric unit (control unit) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT
Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.
DTC
Display item
Malfunction detected condition
Possible cause
C1111
PUMP MOTOR
During the actuator motor operating with ON, when the
actuator motor turns OFF, or when the control line for ac-
tuator motor relay is open.
• Harness or connector
• ABS actuator and electric unit
(control unit)
During the actuator motor operating with OFF, when the
actuator motor turns ON, or when the control line for relay
is shorted to ground.
ABS actuator and electric unit (control unit)
—
Voltage
Connector
Terminal
E41
2
Ground
Battery voltage
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