Nissan Qashqai (2007-2010). Manual - part 736

BRC-142

< COMPONENT DIAGNOSIS >

[ESP/TCS/ABS]

C1155 BRAKE FLUID LEVEL SWITCH

4.

Reconnect connectors and then perform the self-diagnosis. Refer to 

BRC-96, "CONSULT-III Function

(ABS)"

.

Is any item indicated on the self-diagnosis display?

YES

>> GO TO 5.

NO

>> Poor connection of connector terminal. Replace or repair connector.

5.

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 connector terminals.

Is the inspection result normal?

YES

>> GO TO 6.

NO

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

6.

CHECK BRAKE FLUID LEVEL SWITCH CIRCUIT

1.

Disconnect combination meter connector.

2.

Check continuity between brake fluid level switch harness connector terminals and combination meter
harness connector terminal and/or ground.

Is the inspection result normal?

YES

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

NO

>> Repair or replace malfunctioning components.

Component Inspection

INFOID:0000000000924890

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 connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

Brake fluid level switch

Condition

Continuity

Connector

Terminal

E37

1 – 2

When brake fluid is full in the reservoir tank.

Not existed

When brake fluid is empty in the reservoir tank.

Existed

Combination meter

Brake fluid level switch

Continuity

Connector

Terminal

Connector

Terminal

M34

27

E37

1

Existed

Combination meter

—

Continuity

Connector

Terminal

M34

27

Ground

Not existed

Brake fluid level switch

—

Continuity

Connector

Terminal

E37

2

Ground

Existed

Brake fluid level switch

—

Condition

Continuity

Connector

Terminal

E37

1

Ground

When brake fluid is full in the reservoir tank.

Not existed

When brake fluid is empty in the reservoir tank.

Existed

C1155 BRAKE FLUID LEVEL SWITCH

BRC-143

< COMPONENT DIAGNOSIS >

[ESP/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

NO

>> Replace reservoir tank.

Special Repair Requirement

INFOID:0000000000924891

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-78, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-

TRAL POSITION : Description"

.

>> END

BRC-144

< COMPONENT DIAGNOSIS >

[ESP/TCS/ABS]

U1000, U1002 CAN COMM CIRCUIT

U1000, U1002 CAN COMM CIRCUIT

Description

INFOID:0000000001125390

CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.

DTC Logic

INFOID:0000000000924893

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000000924894

INSPECTION PROCEDURE

1.

CHECK CONNECTOR

1.

Turn ignition switch OFF.

2.

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

3.

Check terminal for deformation, disconnection, looseness, and so on. If any malfunction is found, repair or
replace terminal.

4.

Reconnect connector and perform self-diagnosis.

Is above displayed on the self-diagnosis display?

YES

>> Go to 

LAN-46, "Trouble Diagnosis Flow Chart"

.

NO

>> INSPECTION END

Special Repair Requirement

INFOID:0000000000924895

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-78, "ADJUSTMENT OF STEERING ANGLE SENSOR NEU-

TRAL POSITION : Description"

.

>> END

DTC

Display item

Malfunction detected condition

Possible cause

U1000

CAN COMM CIRCUIT

When ABS actuator and electric unit (control unit) is not 
transmitting or receiving CAN communication signal for 2 
seconds or more.

• CAN communication line
• ABS actuator and electric unit 

(control unit)

U1002

SYSTEM COMM

When ABS actuator and electric unit (control unit) is not 
transmitting or receiving CAN communication signal for 2 
seconds or less.

Self-diagnosis results

CAN COMM CIRCUIT

SYSTEM COMM

PARKING BRAKE SWITCH

BRC-145

< COMPONENT DIAGNOSIS >

[ESP/TCS/ABS]

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

PARKING BRAKE SWITCH

Description

INFOID:0000000000924896

The parking brake switch converts the status of the parking brake pedal to an electric signal and transmits it to
the ABS actuator and electric unit (control unit).

Diagnosis Procedure

INFOID:0000000001125318

1.

CHECK COMBINATION METER INPUT SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between combination meter harness connector terminal 26 and ground.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT

1.

Turn ignition switch OFF. 

2.

Disconnect combination meter connector and parking brake switch connector.

3.

Check continuity between combination meter harness connector terminal 26 and parking brake switch
harness connector terminal 1.

4.

Check continuity between combination meter harness connector terminal 26 and ground.

Is the inspection result normal? 

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Component Function Check

INFOID:0000000000924897

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

>> Go to diagnosis procedure. Refer to 

BRC-145, "Diagnosis Procedure"

.

Component Inspection

INFOID:0000000001125391

INSPECTION PROCEDURE

1.

CHECK PARKING BRAKE SWITCH

1.

Turn ignition switch OFF.

2.

Disconnect parking brake switch connector.

26 – Ground

Parking brake ON 

: Approx. 0 V

Parking brake OFF

: Approx. 5 V

26 – 1

: Continuity should exist.

26 – Ground

: Continuity should not exist.

Condition

Brake warning lamp illumination status

When the parking brake switch is opera-
tion

ON

When the parking brake switch is not oper-
ation.

OFF