Infiniti FX35, FX50 (S51). Manual — part 263

C1155 BRAKE FLUID LEVEL SWITCH

BRC-83

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

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C1155 BRAKE FLUID LEVEL SWITCH

Description

INFOID:0000000005234581

The brake fluid level switch converts the brake fluid level to an electric signal and transmits it to the ABS actu-
ator and electric unit (control unit).

DTC Logic

INFOID:0000000005234582

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 “C1155” detected?

YES

>> Proceed to diagnosis procedure. Refer to

BRC-83, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005234583

1.

CHECK BRAKE FLUID LEVEL

Check the brake fluid level. Refer to

BR-10, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Refill the brake fluid. Refer to

BR-10, "Refilling"

.

2.

CHECK CONNECTOR

1.

Turn the ignition switch OFF.

2.

Disconnect brake fluid level switch harness connector.

3.

Disconnect unified meter and A/C amp. harness connector.

4.

Check terminal for deformation, disconnection, looseness, etc.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts.

3.

CHECK BRAKE FLUID LEVEL SWITCH

Check brake fluid level switch. Refer to

BRC-84, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Brake fluid level switch is malfunction. Replace reservoir tank. Refer to

BR-29, "Exploded View"

.

4.

CHECK BRAKE FLUID LEVEL SWITCH CIRCUIT

1.

Check the continuity between brake fluid level switch harness connector and unified meter and A/C amp.
harness connector.

2.

Check the continuity between brake fluid level switch harness connector and ground.

DTC

Display item

Malfunction detected condition

Possible cause

C1155

BR FLUID LEVEL LOW

Brake fluid level is low or communication line between
the ABS actuator and electric unit (control unit) and brake
fluid level switch is open or shorted.

• Harness or connector
• Brake fluid level switch
• Unified meter and A/C amp.

Unified meter and A/C amp.

Brake fluid level switch

Continuity

Connector

Terminal

Connector

Terminal

M67

57

E47

1

Existed

BRC-84

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1155 BRAKE FLUID LEVEL SWITCH

3.

Check the continuity between unified meter and A/C amp. harness connector and ground.

Is the inspection result normal?

YES

>> Replace unified meter and A/C amp.

NO

>> Repair or replace error-detected parts.

Component Inspection

INFOID:0000000005234584

1.

CHECK BRAKE FLUID LEVEL SWITCH

1.

Turn the ignition switch OFF.

2.

Disconnect brake fluid level switch harness connector.

3.

Check the continuity between brake fluid level switch harness connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace reservoir tank. Refer to

BR-29, "Exploded View"

.

Special Repair Requirement

INFOID:0000000005528345

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-

TRAL POSITION : Description"

.

>> END

Brake fluid level switch

—

Continuity

Connector

Terminal

E47

2

Ground

Existed

Unified meter and A/C amp.

—

Continuity

Connector

Terminal

M67

57

Ground

Not existed

Brake fluid level switch

Condition

Continuity

Terminal

1

−

2

When brake fluid is full in the reservoir tank.

Not existed

When brake fluid is empty in the reservoir
tank.

Existed

C1156 STEERING ANGLE SENSOR (CAN)

BRC-85

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

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C1156 STEERING ANGLE SENSOR (CAN)

Description

INFOID:0000000005234586

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

DTC Logic

INFOID:0000000005234587

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 “C1156” detected?

YES

>> Proceed to diagnosis procedure. Refer to

BRC-85, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005234588

1.

CHECK CAN COMMUNICATION LINE

Check CAN communication line. Refer to

BRC-95, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace error-detected parts.

2.

CHECK STEERING ANGLE SENSOR

Check steering angle sensor. Refer to

BRC-74, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

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

NO

>> Repair or replace error-detected parts.

Special Repair Requirement

INFOID:0000000005528346

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

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

BRC-9, "ADJUSTMENT OF STEER-

ING ANGLE SENSOR NEUTRAL POSITION : Description"

.

>> END

DTC

Display item

Malfunction detected condition

Possible cause

C1156

ST ANG SEN COM CIR

When there is a malfunction in the CAN communication
circuit or steering angle sensor.

• CAN communication line
• ABS actuator and electric unit

(control unit)

• Steering angle sensor

BRC-86

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1185 ICC UNIT

C1185 ICC UNIT

Description

INFOID:0000000005234590

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

DTC Logic

INFOID:0000000005234591

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 “C1185” detected?

YES

>> Proceed to diagnosis procedure. Refer to

BRC-86, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005234592

1.

CHECK ICC SENSOR INTEGRATED UNIT CIRCUIT

Perform self-diagnosis for “ICC” with CONSULT-III.

Is any item indicated on the self-diagnosis display?

YES

>> Repair or replace error-detected parts.

NO

>> GO TO 2.

2.

CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)

Perform self-diagnosis for “ABS” with CONSULT-III.
Is any item indicated on the self-diagnosis display?

YES

>> Repair or replace error-detected parts.

NO

>> INSPECTION END

Special Repair Requirement

INFOID:0000000005528347

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-

TRAL POSITION : Description"

.

>> END

DTC

Display item

Malfunction detected condition

Possible cause

C1185

ACC CONT

ICC sensor integrated unit internal malfunction.

• Harness or connector
• ICC sensor integrated unit
• ABS actuator and electric unit

(control unit)

• CAN communication line