Nissan Titan. Manual - part 30

C1143, C1144 STEERING ANGLE SENSOR

BRC-61

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-9, "CALIBRATION OF DECEL G SENSOR : Description"

.

>> END

BRC-62

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1155 BRAKE FLUID LEVEL SWITCH

C1155 BRAKE FLUID LEVEL SWITCH

Description

INFOID:0000000009883670

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:0000000009883671

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF-DIAGNOSIS RESULTS

Check the self-diagnosis results.

Is above displayed on the self-diagnosis display?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-62, "Diagnosis Procedure"

.

NO

>> Inspection End

Diagnosis Procedure

INFOID:0000000009883672

Regarding Wiring Diagram information, refer to 

BRC-92, "Wiring Diagram"

.

1.

CONNECTOR INSPECTION

1. Disconnect ABS actuator and electric unit (control unit) and brake fluid level switch connectors. 

2. Check the terminals for deformation, disconnection, looseness or damage.
Is the inspection result normal?

YES

>> GO TO 2

NO

>> Repair or replace as necessary.

2.

CHECK HARNESS BETWEEN BRAKE FLUID LEVEL SWITCH AND ABS ACTUATOR AND ELECTRIC

UNIT (CONTROL UNIT)
1. Check continuity between ABS actuator and electric unit (control

unit) connector E125 (A) terminal 8 and brake fluid level switch

connector E21 (B) terminal 1.

2. Check continuity between ABS actuator and electric unit (control

unit) connector E125 (A) terminal 8 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
• Brake  fluid  level

Self-diagnosis results

BR FLUID LEVEL LOW

ABS actuator and electric unit 

(control unit)

Brake fluid level switch

Continuity

Connector

Terminal

Connector

Terminal

A: E125

8

B: E21

1

Yes

AWFIA0025ZZ

C1155 BRAKE FLUID LEVEL SWITCH

BRC-63

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

Is the inspection result normal?

YES

>> GO TO 3

NO

>> Repair or replace malfunctioning components.

3.

CHECK BRAKE FLUID LEVEL SWITCH GROUND

Check continuity between brake fluid level switch connector E21 ter-

minal 2 and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair or replace malfunctioning components.

4.

CHECK BRAKE FLUID LEVEL SWITCH

Perform the brake fluid level switch component inspection. refer to 

BRC-63, "Component Inspection"

.

Is the inspection result normal?

YES

>> Perform self-diagnosis again. If the same results appear, replace ABS actuator and electric unit

(control unit). Refer to 

BRC-116, "Removal and Installation"

.

NO

>> Replace brake fluid level switch.

Component Inspection

INFOID:0000000009883673

1.

CHECK BRAKE FLUID LEVEL SWITCH

1. Turn ignition switch OFF.

2. Disconnect brake fluid level switch connector.

3. Check continuity between brake fluid level switch terminals.

Is the inspection result normal?

YES

>> Inspection End

NO

>> Replace brake fluid level switch.

Special Repair Requirement

INFOID:0000000009883674

1.

ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION

Always perform neutral position adjustment for the steering angle sensor when replacing the ABS actuator

and electric unit (control unit). Refer to 

BRC-8, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL

POSITION : Description"

.

>> GO TO 2

2.

CALIBRATION OF DECEL G SENSOR

Always perform calibration of decel G sensor when replacing the ABS actuator and electric unit (control unit).

Refer to 

BRC-9, "CALIBRATION OF DECEL G SENSOR : Description"

.

ABS actuator and electric unit (control unit)

—

Continuity

Connector

Terminal

A: E125

8

Ground

No

Brake fluid level switch

—

Continuity

Connector

Terminal

E21

2

Ground

Yes

AWFIA0026ZZ

Brake fluid level switch terminals

Condition

Continuity

1 

− 2

Brake fluid reservoir is full.

No

Brake fluid reservoir is empty.

Yes

ALFIA0026ZZ

BRC-64

< DTC/CIRCUIT DIAGNOSIS >

[VDC/TCS/ABS]

C1155 BRAKE FLUID LEVEL SWITCH

>> END