Nissan Leaf. Manual - part 331

BRC-114

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1144 INCOMPLETE STEERING ANGLE SENSOR ADJUSTMENT

2. Check the steering angle sensor system. Refer to 

BRC-110, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal and Installa-

tion"

.

NO

>> Repair or replace error-detected parts.

C1155 BRAKE FLUID LEVEL SWITCH

BRC-115

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

C1155 BRAKE FLUID LEVEL SWITCH

DTC Logic

INFOID:0000000010120083

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn power switch OFF and

wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1155” detected?

YES

>> Proceed to 

BRC-115, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010120084

Regarding Wiring Diagram information. Refer to 

BRC-58, "Wiring Diagram"

.

1.

CHECK CONNECTOR

1. Turn the power switch OFF.

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

3. Disconnect brake fluid level switch harness connector.
Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace error-detected parts. GO TO 2.

2.

PERFORM SELF DIAGNOSTIC (1)

With CONSULT

1. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

2. Repeat step 1 two or more times.

3. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1155” detected?

YES

>> GO TO 3.

DTC

Display Item

Malfunction detected condition

Possible causes

C1155

BR FLUID LEVEL LOW

• When brake fluid level low signal is detected.
• When an open circuit is detected in brake fluid level 

switch circuit.

• Harness or connector
• ABS actuator and electric unit 

(control unit)

• Brake fluid level switch
• Combination meter

BRC-116

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C1155 BRAKE FLUID LEVEL SWITCH

NO

>> Inspection End.

3.

CHECK BRAKE FLUID LEVEL

1. Turn the power switch OFF.

2. Check the brake fluid level. Refer to 

BR-493, "Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Refill brake fluid. Refer to 

BR-493, "Refilling"

. GO TO 4.

4.

PERFORM SELF DIAGNOSTIC (2)

With CONSULT

1. Erase “Self Diagnosis Result” for “ABS”.

2. Turn the power switch OFF 

→ ON → OFF.

CAUTION:

Be sure to wait of 10 seconds after turning power switch OFF or ON.

3. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

4. Repeat step 3 two or more times.

5. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1155” detected?

YES

>> GO TO 5.

NO

>> Inspection End.

5.

CHECK BRAKE FLUID LEVEL SWITCH

Check the brake fluid level switch. Refer to 

BRC-118, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> Replace electrically-driven intelligent brake unit. Refer to 

BR-510, "Removal and installation"

. GO

TO 6.

6.

PERFORM SELF DIAGNOSTIC (3)

With CONSULT

1. Erase “Self Diagnostic Result” of “ABS”.

2. Turn the power switch OFF 

→ ON → OFF.

CAUTION:

Be sure to wait of 10 seconds after turning power switch OFF or ON.

3. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

4. Repeat step 3 two or more times.

5. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1155” detected?

YES

>> GO TO 7.

NO

>> Inspection End.

7.

CHECK CONNECTOR AND TERMINAL

1. Turn the power switch OFF.

2. Disconnect combination meter harness connector.

3. Check the combination meter harness connector for disconnection or looseness.

4. Check the combination meter pin terminals for damage or loose connection with harness connector.

5. Disconnect brake fluid level switch harness connector.

6. Check the brake fluid level switch harness connector for disconnection or looseness.

7. Check the brake fluid level switch pin terminals for damage or loose connection with harness connector.
Is the inspection result normal?

YES

>> GO TO 9.

C1155 BRAKE FLUID LEVEL SWITCH

BRC-117

< DTC/CIRCUIT DIAGNOSIS >

[WITH VDC]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

NO

>> Repair or replace error-detected parts. GO TO 8.

8.

PERFORM SELF DIAGNOSTIC (4)

With CONSULT

1. Erase “Self Diagnostic Result” of “ABS”.

2. Turn the power switch OFF 

→ ON → OFF.

CAUTION:

Be sure to wait of 10 seconds after turning power switch OFF or ON.

3. Turn the power switch OFF 

→ ON.

CAUTION:

• Be sure to wait of 10 seconds after turning power switch OFF or ON.

• Set the vehicle to READY.

4. Repeat step 3 two or more times.

5. Perform “Self Diagnostic Result” of “ABS”.
Is DTC “C1155” detected?

YES

>> GO TO 9.

NO

>> Inspection End.

9.

CHECK BRAKE FLUID LEVEL SWITCH HARNESS

1. Turn the power switch OFF.

2. Disconnect brake fluid level switch harness connector.

3. Disconnect combination meter harness connector.

4. Check the continuity between brake fluid level switch harness connector and combination meter harness

connector.

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

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace error-detected parts. GO TO 8.

10.

CHECK BRAKE FLUID LEVEL SWITCH GROUND

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

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair or replace error-detected parts. GO TO 11.

11.

CHECK COMBINATION METER

Check the combination meter. Refer to 

MWI-49, "CONSULT Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> Replace ABS actuator and electric unit (control unit). Refer to 

BRC-162, "Removal and Installa-

tion"

.

NO

>> Repair or replace combination meter. Refer to 

MWI-102, "Removal and Installation"

.

Brake fluid level switch

Combination meter

Continuity

Connector

Terminal

Connector

Terminal

E37

1

M34

25

Yes

Brake fluid level switch

—

Continuity

Connector

Terminal

E37

1

Ground

No

Brake fluid level switch

—

Continuity

Connector

Terminal

E37

2

Ground

Yes